release: v0.3.17 — Windows x64 binary upgrade to 145.0.7632.159.7

- Bump wrapper version to 0.3.17 (Python + JS)
- Update PLATFORM_CHROMIUM_VERSIONS: windows-x64 109.2 → 159.7
- Update patch counts in platform tables (Linux 33, Windows 33)
- Add Linux arm64 to JS README platform table
- Update CHANGELOG with all changes since v0.3.16

.github/FUNDING.yml

@@ -0,0 +1 @@
+ko_fi: cloakhq

.github/workflows/attest-release.yml

@@ -0,0 +1,28 @@
+name: Attest Release Binary
+
+on:
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Release tag (e.g. chromium-v145.0.7632.159.2)'
+        required: true
+
+jobs:
+  attest:
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write      # Sigstore OIDC
+      attestations: write  # GitHub attestation API
+      contents: write      # Download release assets
+    steps:
+      - name: Download release binaries
+        run: gh release download ${{ github.event.inputs.tag }} --repo CloakHQ/cloakbrowser --pattern "cloakbrowser-*.tar.gz" --pattern "cloakbrowser-*.zip"
+        env:
+          GH_TOKEN: ${{ github.token }}
+
+      - name: Attest build provenance
+        uses: actions/attest-build-provenance@v2
+        with:
+          subject-path: |
+            cloakbrowser-*.tar.gz
+            cloakbrowser-*.zip

.github/workflows/ci.yml

@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  python:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - name: Install dependencies
+        run: pip install -e ".[dev]" pytest pytest-asyncio
+      - name: Run tests
+        run: pytest tests/ -v -m "not slow"
+
+  javascript:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - name: Install and build
+        run: cd js && npm install && npm run build
+      - name: Typecheck
+        run: cd js && npm run typecheck
+      - name: Run tests
+        run: cd js && npm test

.github/workflows/publish.yml

@@ -0,0 +1,136 @@
+name: Publish
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+    inputs:
+      job:
+        description: 'Job to run (leave empty to run all)'
+        required: false
+        type: choice
+        options:
+          - ''
+          - publish-pypi
+          - publish-npm
+          - publish-docker
+
+concurrency:
+  group: publish
+  cancel-in-progress: false
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - name: Python tests
+        run: |
+          pip install -e ".[dev]" pytest pytest-asyncio
+          pytest tests/ -v -m "not slow"
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+      - name: JavaScript tests
+        run: cd js && npm ci && npm run build && npm test
+
+  validate-version:
+    if: startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - name: Check tag matches package versions
+        run: |
+          TAG="${GITHUB_REF_NAME#v}"
+          PY=$(python -c 'import re; print(re.search(r"__version__\s*=\s*[\"'\'']([^\"'\'']+)", open("cloakbrowser/_version.py").read()).group(1))')
+          JS=$(python -c 'import json; print(json.load(open("js/package.json"))["version"])')
+          echo "Tag: $TAG | Python: $PY | npm: $JS"
+          [ "$TAG" = "$PY" ] || { echo "ERROR: tag v$TAG != _version.py $PY"; exit 1; }
+          [ "$TAG" = "$JS" ] || { echo "ERROR: tag v$TAG != package.json $JS"; exit 1; }
+
+  publish-pypi:
+    needs: [test, validate-version]
+    if: always() && needs.test.result == 'success' && (needs.validate-version.result == 'success' || needs.validate-version.result == 'skipped')
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write  # OIDC trusted publishing — no PYPI_TOKEN needed
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - name: Build
+        run: |
+          pip install build
+          python -m build
+      - name: Publish to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+
+  publish-npm:
+    needs: [test, validate-version]
+    if: always() && needs.test.result == 'success' && (needs.validate-version.result == 'success' || needs.validate-version.result == 'skipped')
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write  # OIDC trusted publishing + provenance — no NPM_TOKEN needed
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          registry-url: 'https://registry.npmjs.org'
+      - name: Upgrade npm
+        run: npm install -g npm@latest
+      - name: Build
+        run: cd js && npm ci && npm run build
+      - name: Publish to npm
+        run: cd js && npm publish --provenance --access public
+
+  publish-docker:
+    needs: [test, validate-version]
+    if: always() && needs.test.result == 'success' && (needs.validate-version.result == 'success' || needs.validate-version.result == 'skipped')
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write      # Cosign keyless signing + attestations
+      contents: read
+      attestations: write
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+      - name: Extract version
+        run: |
+          VERSION=$(python -c 'import re; print(re.search(r"__version__\s*=\s*[\"'\'']([^\"'\'']+)", open("cloakbrowser/_version.py").read()).group(1))')
+          echo "VERSION=$VERSION" >> $GITHUB_ENV
+      - uses: docker/setup-qemu-action@v3
+      - uses: docker/setup-buildx-action@v3
+      - uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USER }}
+          password: ${{ secrets.DOCKER_PAT }}
+      - name: Build and push
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            cloakhq/cloakbrowser:${{ env.VERSION }}
+            cloakhq/cloakbrowser:latest
+          provenance: true
+          sbom: true
+      - uses: sigstore/cosign-installer@v3
+      - name: Sign image
+        run: cosign sign --yes cloakhq/cloakbrowser@${{ steps.build.outputs.digest }}
+      - name: Attest build provenance
+        uses: actions/attest-build-provenance@v2
+        with:
+          subject-name: index.docker.io/cloakhq/cloakbrowser
+          subject-digest: ${{ steps.build.outputs.digest }}
+          push-to-registry: true

.gitignore

@@ -37,6 +37,10 @@ htmlcov/
 CLAUDE.md
 .claude/
 
+# JavaScript / Node.js
+js/node_modules/
+js/dist/
+
 # Distribution
 *.tar.gz
 *.whl
@@ -46,6 +50,18 @@ AGENTS.md
 # Private docs (launch posts, strategy)
 docs/
 
+# Internal test infrastructure (Docker, VPS-specific)
+test-infra/
+
+# Website (deployed separately)
+site/
+
+# Browser profile manager (deployed separately)
+manager/
+
 # Release scripts
 publish.sh
+deploy.sh
 .env
+debug
+publish-docker.sh

BINARY-LICENSE.md

@@ -0,0 +1,114 @@
+# CloakBrowser Binary License
+
+**Version 1.0 — February 2026**
+
+Copyright (c) 2026 CloakHQ. All rights reserved.
+
+This license applies to the compiled CloakBrowser Chromium binary ("Binary") distributed via GitHub Releases and cloakbrowser.dev. It does **not** apply to the wrapper source code in this repository, which is licensed under the [MIT License](LICENSE).
+
+By downloading, installing, or using the Binary, you agree to be bound by the terms of this license.
+
+## Intellectual Property
+
+The Binary is built on Chromium, which is open-source software by The Chromium Authors under the BSD 3-Clause License, and incorporates components from the open-source ungoogled-chromium project. CloakHQ's build configuration, patches, and the Binary as a combined work are the proprietary property of CloakHQ. This license governs the Binary as distributed by CloakHQ — it does not restrict rights granted by upstream open-source licenses to their respective components.
+
+## Grant of Use
+
+You are granted a non-exclusive, non-transferable, royalty-free license to use the Binary for personal or commercial purposes. No fees are required.
+
+## Restrictions
+
+You may NOT:
+
+1. **Redistribute** the Binary, in whole or in part, whether modified or unmodified
+2. **Resell, sublicense, or repackage** the Binary, or include it in any product or service distributed to third parties
+3. **Reverse engineer, decompile, or disassemble** the Binary, or attempt to derive source code from it, except to the extent permitted by applicable law
+4. **Modify** the Binary or create derivative works based on it
+5. **Remove or alter** any copyright notices, license files, or attribution included with the Binary
+
+Normal use of the Binary with command-line flags, browser extensions, managed policies, custom profiles, or user data directories does not constitute modification or creation of derivative works.
+
+## Cloud, Container & Integration Use
+
+**Internal use** — You may store and run the unmodified Binary within internal infrastructure, including Docker images, VM templates, CI runners, container registries, and artifact repositories (e.g., Artifactory, Nexus), solely for your organization's internal operational purposes.
+
+**Dependency listing** — Listing CloakBrowser as a dependency in your project or third-party framework (e.g., in `requirements.txt`, `package.json`, or documentation) is not redistribution, as end users download the Binary directly from official CloakHQ channels. No commercial license is required for this.
+
+**Using CloakBrowser for your own business is free** — no license beyond this one is needed, regardless of company size or revenue.
+
+**OEM/SaaS license required** — Bundling, embedding, or pre-installing the Binary into a product, hosted service, or cloud artifact distributed to third parties requires a separate OEM license. This includes running the Binary on your infrastructure to serve third-party customers (e.g., browser-as-a-service). Contact cloakhq@pm.me for OEM/SaaS licensing.
+
+## Official Distribution
+
+The Binary must originally be obtained from official CloakHQ distribution channels, including GitHub Releases (github.com/CloakHQ/CloakBrowser) and cloakbrowser.dev. Internal organizational mirrors permitted under the Cloud, Container & Integration Use section are not considered unauthorized sources.
+
+## Trademark Notice
+
+This license does not grant you any right to use the CloakHQ or CloakBrowser name, logo, or trademarks, except for nominative use reasonably necessary to refer to CloakHQ or CloakBrowser.
+
+## Attribution
+
+Attribution is appreciated but not required. If you'd like to credit CloakBrowser, a "Powered by CloakBrowser" notice with a link to https://github.com/CloakHQ/CloakBrowser in your documentation, README, or about page is welcome.
+
+## Acceptable Use
+
+You are solely responsible for how you use the Binary. You agree NOT to use the Binary for any activity that violates applicable laws or regulations in your jurisdiction. CloakHQ does not endorse, encourage, or support any illegal use.
+
+Without limiting the above, the following uses are expressly prohibited:
+
+- Unauthorized access to financial, banking, healthcare, or government authentication systems
+- Credential stuffing, brute-force login attempts, or automated account creation
+- Circumventing authentication on systems you do not own or have authorization to test
+- Any activity that constitutes fraud, identity theft, or unauthorized data collection
+
+## Indemnification
+
+You agree to indemnify and hold harmless CloakHQ and its contributors from any claims, damages, losses, liabilities, and expenses (including reasonable legal fees) arising from your unlawful use of the Binary or your violation of this license.
+
+## Disclaimer
+
+THE BINARY IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE BINARY OR THE USE OR OTHER DEALINGS IN THE BINARY.
+
+## Limitation of Liability
+
+IN NO EVENT SHALL CLOAKHQ OR ITS CONTRIBUTORS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, INCLUDING BUT NOT LIMITED TO LOSS OF PROFITS, DATA, BUSINESS OPPORTUNITIES, OR GOODWILL, ARISING OUT OF OR IN CONNECTION WITH THE USE OF THE BINARY, REGARDLESS OF THE THEORY OF LIABILITY. CLOAKHQ'S TOTAL AGGREGATE LIABILITY SHALL NOT EXCEED ONE HUNDRED US DOLLARS (US $100).
+
+## Data Collection
+
+CloakHQ does not intentionally include telemetry, analytics, or tracking mechanisms in the Binary. The Binary is built on ungoogled-chromium, which removes Google-specific services and telemetry. Any network activity may result from normal browser operation, Chromium subsystems, user configuration, extensions, or the web pages and services you access, and not from any telemetry or analytics service operated by CloakHQ.
+
+## Updates
+
+CloakHQ is under no obligation to provide updates, patches, new versions, or support for the Binary. Updates, when provided, are subject to the terms of this license.
+
+## Termination
+
+This license terminates automatically if you violate any of its terms. Upon termination, you must destroy all copies of the Binary in your possession. The Intellectual Property, Restrictions, Trademark Notice, Indemnification, Disclaimer, Governing Law, Reservation of Rights, Entire Agreement, No Waiver, Assignment, and Severability sections survive termination.
+
+## Governing Law
+
+This license is governed by the laws of the jurisdiction in which CloakHQ is established. Any disputes arising under this license shall be subject to the exclusive jurisdiction of the courts in that jurisdiction.
+
+## Reservation of Rights
+
+All rights not expressly granted under this license are reserved by CloakHQ.
+
+## Entire Agreement
+
+This license constitutes the entire agreement between you and CloakHQ regarding the Binary and supersedes any prior or contemporaneous understandings relating to the Binary.
+
+## No Waiver
+
+Failure by CloakHQ to enforce any provision of this license does not constitute a waiver of that provision or any other provision.
+
+## Assignment
+
+You may not assign or transfer this license or any rights under it without prior written consent from CloakHQ.
+
+## Severability
+
+If any provision of this license is held to be unenforceable or invalid, that provision shall be modified to the minimum extent necessary to make it enforceable, and all remaining provisions shall continue in full force and effect.
+
+## Contact
+
+For licensing inquiries, including redistribution or OEM licensing, contact cloakhq@pm.me.

CHANGELOG.md

@@ -0,0 +1,246 @@
+# Changelog
+
+All notable changes to CloakBrowser — wrapper and binary — are documented here.
+
+Changes are tagged: **[wrapper]** for Python/JS wrapper, **[binary]** for Chromium patches.
+
+---
+
+## [0.3.17] — 2026-03-15
+
+- **[binary]** Windows x64 build upgraded to 145.0.7632.159.7 — 33 source-level C++ patches, matching Linux
+- **[wrapper]** Auto-inject GPU blocklist bypass for headed mode and Windows — fixes WebGL/WebGPU on software GPUs in Docker/VNC (fixes #56)
+- **[wrapper]** Add 8 framework integration examples (Scrapy, Crawlee, BrowserBase, etc.) and README integrations section
+
+## [0.3.16] — 2026-03-14
+
+- **[binary]** Linux arm64 build available — Raspberry Pi, AWS Graviton, Oracle Ampere now supported
+- **[wrapper]** Add donate link to first-launch welcome banner
+
+## [0.3.15] — 2026-03-13
+
+- **[binary]** Upgrade Linux build to 145.0.7632.159.7 — 33 source-level C++ patches
+- **[binary]** StorageBuckets API quota normalization — closes the last storage-based incognito detection vector
+- **[wrapper]** Fix non-ASCII character support in humanized typing — Cyrillic, CJK, and emoji now type correctly (thanks [@evelaa123](https://github.com/evelaa123))
+
+## [0.3.14] — 2026-03-12
+
+- **[binary]** Upgrade Linux build to 145.0.7632.159.6 — fix persistent context detection by FingerprintJS
+- **[binary]** Storage quota normalization for persistent context profiles
+- **[binary]** Fix outerHeight calculation for non-incognito contexts
+- **[wrapper]** Add CLI for binary management — `python -m cloakbrowser install` / `npx cloakbrowser install` with visible download progress (closes #43)
+
+## [0.3.13] — 2026-03-10
+
+- **[wrapper]** Suppress Playwright's `--enable-unsafe-swiftshader` default arg — eliminates SwiftShader software renderer detection signal, letting the binary's GPU spoofing work cleanly
+- **[binary]** Upgrade Linux build to 145.0.7632.159.5 — fix WebGPU adapter limits and features for NVIDIA profiles
+
+## [0.3.12] — 2026-03-10
+
+- **[binary]** Upgrade Linux build to 145.0.7632.159.4
+- **[binary]** Native locale spoofing — new C++ patch replaces detectable CDP-level locale emulation
+- **[binary]** WebGPU fingerprint hardening — spoof adapter features, limits, device ID, and subgroup sizes for cross-API consistency
+- **[binary]** Restore WebGPU blocklist bypass auto-injection (safe now with full adapter spoofing)
+- **[binary]** Fix WebGL renderer suffix — remove driver version string flagged by BrowserLeaks
+- **[wrapper]** Use binary flags for timezone/locale instead of CDP emulation — eliminates a detection vector
+- **[wrapper]** Support bare proxy format (`user:pass@host:port`) without scheme prefix
+- **[wrapper]** Use ANGLE-wrapped GPU strings in default stealth args for realistic WebGL fingerprint
+
+## [0.3.11] — 2026-03-08
+
+- **[wrapper]** `humanize=True` — human-like mouse (Bézier curves, overshoot), keyboard (per-character timing, thinking pauses), scroll (accelerate/cruise/decelerate), and click behavior. Two presets: `default` and `careful`. Works in Python and JS. (thanks [@evelaa123](https://github.com/evelaa123))
+- **[binary]** CDP input stealth — 4 new source-level C++ patches removing automation signals from input events
+- **[binary]** Support `--remote-debugging-address` flag for CDP bind address — eliminates the socat workaround in `cloakserve` Docker mode
+- **[wrapper]** `cloakserve` updated to use `--remote-debugging-address=0.0.0.0` directly — socat dependency removed from Docker image
+- **[binary]** GPU fingerprint accuracy improvements — renderer suffix strings now match real Chrome output across Windows and Linux profiles
+- **[binary]** GPU capability accuracy fix for NVIDIA profiles — spoofed values now reflect actual hardware limits
+- **[binary]** macOS GPU accuracy fix — GPU model database reference corrected for Apple Silicon profiles
+- **[binary]** Fix CDP input synthesis — a guard condition prevented the patch from activating; now fires correctly on all input events
+- **[binary]** Code quality hardening across patches — correctness and reliability fixes
+
+## [0.3.10] — 2026-03-07
+
+- **[binary]** Upgrade Linux build to 145.0.7632.159.2
+- **[binary]** Fix detection regression caused by unnecessary browser flag (fixes #16)
+- **[binary]** Fix fingerprint consistency in offline audio rendering
+- **[wrapper]** Add `cloakserve` CDP server mode for Docker — exposes Chrome DevTools Protocol on `0.0.0.0:9222` for external tool integration
+- **[wrapper]** Add wrapper regression tests: page.goto timing with stealth init (#9), add_init_script compatibility with proxy auth (#27)
+
+## [0.3.9] — 2026-03-05
+
+- **[binary]** Upgrade Chromium base to 145.0.7632.159 (Linux x64). macOS and Windows remain on 145.0.7632.109.2
+- **[binary]** WebGPU adapter spoofing for headless/Docker, timezone multi-context fix, stealth audit phase 2 (6 detection vector fixes), font auto-hide for cross-platform fingerprints
+- **[wrapper]** Default Playwright backend switched from `patchright` to stock `playwright`. Patchright broke proxy auth and `add_init_script` (#27) and is redundant since the binary handles stealth at C++ level. Opt in with `launch(backend="patchright")` or `CLOAKBROWSER_BACKEND=patchright` env var. Install: `pip install cloakbrowser[patchright]`
+- **[wrapper]** Deduplicate CLI flags when user args overlap with stealth defaults — user values win cleanly instead of passing both to Chromium
+- **[wrapper]** Extract shared `buildArgs` into `js/src/args.ts` (JS DRY fix), guard debug logging behind `DEBUG=cloakbrowser` env var
+
+## [0.3.7] — 2026-03-05
+
+- **[wrapper]** Unify timezone parameter: rename `timezone_id` to `timezone` in `launch_context()`, `launch_persistent_context()`, and `launch_persistent_context_async()` (Python). Old `timezone_id` still works with a deprecation warning. JS: deprecate `timezoneId` on `LaunchContextOptions` — use `timezone` (inherited from `LaunchOptions`)
+- **[wrapper]** Docker Hub image (`cloakhq/cloakbrowser`) — pre-built with Python + JS wrappers, Xvfb for headed mode, and `cloaktest` CLI shortcut. One-liner: `docker run --rm cloakhq/cloakbrowser cloaktest`
+- **[wrapper]** Add "Launching stealth browser..." feedback to all examples for better UX in Docker/CI
+- **[wrapper]** Comprehensive unit tests: 169 Python + 88 JS (up from 59 + 47)
+- **[docs]** Streamline READMEs for launch — reorder for conversion, collapse fingerprint flags, update Docker section
+
+## [0.3.6] — 2026-03-04
+
+- **[wrapper]** `proxy` parameter now accepts a Playwright proxy dict (`{server, bypass, username, password}`) in addition to URL strings — enables bypass lists and separate auth fields (PR #24). **TS note:** type changed from `string` to `string | object` — code that assumed `proxy` is always a string may need a `typeof` narrowing check
+
+## [0.3.5] — 2026-03-04
+
+- **[wrapper]** Add `launch_persistent_context()` and `launch_persistent_context_async()` (Python) — persistent browser profiles with cookie/localStorage persistence across sessions, avoids incognito detection (thanks [@evelaa123](https://github.com/evelaa123), [@yahooguntu](https://github.com/yahooguntu) — PRs #22, #17)
+- **[wrapper]** Add `launchPersistentContext()` (JS/TS) — same feature for JavaScript with full type support
+- **[wrapper]** Fix Windows zip extraction failure when primary download server is down — file handle leak caused `ERROR_SHARING_VIOLATION` on fallback download (thanks [@evelaa123](https://github.com/evelaa123) — PR #23)
+
+## [0.3.4] — 2026-03-04
+
+Binary v14: auto-spoof restored with seed, wrapper simplified to match.
+
+- **[binary]** Restore full auto-spoof when `--fingerprint=seed` is set — all randomized properties now derive from the seed consistently
+- **[binary]** Auto-inject random fingerprint seed at startup if none provided. Binary is stealthy with zero flags
+- **[binary]** 26 source-level C++ patches (up from 25)
+- **[wrapper]** Simplify default stealth args — remove flags the binary now auto-generates. Wrapper still sets platform profile on Linux and `--no-sandbox`
+- **[wrapper]** Fix timezone in `launch_context()` — use Playwright's per-context timezone instead of binary flag, fixing mismatch when creating new browser contexts with geoip
+- **[wrapper]** Clarify README platform detection behavior
+
+## [0.3.3] — 2026-03-03
+
+All platforms now run Chromium 145 v2 with 25 patches. Windows x64 added.
+
+- **[binary]** Auto-spoof by default — binary is stealthy with zero flags. Random fingerprint seed auto-generated at startup, no wrapper or configuration required
+- **[binary]** Platform-aware auto-detection — GPU, screen dimensions, and User-Agent automatically match the real OS (macOS, Linux, Windows) without explicit flags
+- **[binary]** Expanded GPU model database for realistic per-session diversity
+- **[binary]** First macOS v145 builds (arm64 + x64) — 25 patches, up from 16 on v142
+- **[binary]** First Windows x64 v145 build — 25 patches
+- **[wrapper]** Add Windows x64 platform support — auto-download, binary path resolution, and platform detection
+- **[wrapper]** Upgrade macOS (arm64 + x64) from Chromium 142 to 145 — all platforms now ship the same 25-patch build
+- **[wrapper]** Add explicit Mac GPU flags (`Apple M3 Metal` renderer) to default stealth args for consistent WebGL fingerprints
+- **[wrapper]** Improve reCAPTCHA stealth test — wait for score element instead of blind sleep
+- **[wrapper]** JS: add `win32-x64` platform mapping, Windows binary path (`chrome.exe`)
+
+## [0.3.1] — 2026-03-03
+
+- **[wrapper]** Auto-check for wrapper updates on startup (PyPI/npm). Notifies users when a newer wrapper version is available. Runs once per process, respects `CLOAKBROWSER_AUTO_UPDATE=false`.
+
+---
+
+## [0.3.0] — 2026-03-02
+
+Chromium v145 upgrade. 25 fingerprint patches (up from 16). New download verification and fallback system. macOS v145 binary builds pending.
+
+### Breaking
+
+- **[wrapper]** Python dependency changed from `playwright` to `patchright` (CDP stealth fork). Patchright is API-compatible, but if you import `playwright` directly elsewhere, add it as a separate dependency. Replace `from playwright.sync_api` with `from patchright.sync_api` (or keep using `cloakbrowser.launch()` which handles this automatically).
+- **[wrapper]** `launch_context()` / `launchContext()` now defaults viewport to 1920×947 (realistic maximized Chrome on 1080p Windows with 48px taskbar) instead of Playwright's default 1280×720. Pass `viewport={"width": 1280, "height": 720}` explicitly to restore old behavior.
+
+### 2026-03-02
+
+- **[binary]** Full stealth audit — multiple detection vectors eliminated, improved cross-API consistency
+- **[binary]** Platform-aware fingerprint defaults: screen dimensions, taskbar, and layout auto-adjust per spoofed platform
+- **[binary]** Stability and performance improvements across fingerprint patches
+- **[binary]** New optional flags: `--fingerprint-fonts-dir`, `--fingerprint-taskbar-height`
+- **[wrapper]** Sync wrapper with latest binary changes: updated flag names, viewport, and defaults
+- **[wrapper]** Per-platform Chromium versioning — Linux and macOS can track different binary versions independently
+- **[wrapper]** Improved SHA-256 checksum verification and version marker migration
+
+### 2026-03-01
+
+- **[wrapper]** Upgrade wrapper to Chromium v145.0.7632.109
+- **[wrapper]** Add GitHub Releases fallback when primary download mirror is unavailable
+- **[wrapper]** Add SHA-256 checksum verification for binary downloads
+- **[wrapper]** Wire timezone and locale params to Chromium binary flags
+- **[wrapper]** Add device memory to default stealth args
+- **[wrapper]** JS: add `colorScheme` support, guard download fallback against partial failures
+
+### 2026-02-28
+
+- **[binary]** Enforce strict flag discipline — patches only activate when explicitly configured via command-line flags
+- **[binary]** Improved fingerprint consistency across multiple browser APIs
+- **[binary]** 3 new fingerprint patches + bug fixes in existing patches
+- **[binary]** New command-line flag for device memory spoofing
+- **[infra]** Automated test matrix: 8 groups, 41+ tests across core stealth, fingerprint noise, bot detection, reCAPTCHA, TLS, Turnstile, residential proxy, and enterprise reCAPTCHA
+- **[infra]** Docker-based test runner with subprocess isolation per test group
+
+### 2026-02-25
+
+- **[binary]** Reduced automation markers visible to detection scripts
+- **[binary]** Added browser API support at build time
+- **[binary]** Improved screen property consistency
+
+### 2026-02-24
+
+- **[binary]** Comprehensive fingerprint audit and hardening pass
+- **[binary]** Fixed font rendering edge case on cross-platform spoofing
+- **[binary]** 4 new fingerprint patches
+
+### 2026-02-22
+
+- **[binary]** Start Chromium v145 build (v145.0.7632.109)
+- **[binary]** 24 fingerprint patches ported and adapted
+
+---
+
+## [0.2.2] — 2026-03-01
+
+### 2026-03-01
+
+- **[wrapper]** Fix: replace `page.wait_for_timeout()` with `time.sleep()` to avoid timing leak
+- **[wrapper]** Add auto-detect timezone and locale from proxy IP via GeoIP lookup
+- **[binary]** CDP detection vector audit and hardening
+
+---
+
+## [0.2.0] — 2026-02-27
+
+macOS platform release. JavaScript/TypeScript wrapper. Self-hosted binary mirror.
+
+### 2026-02-27
+
+- **[wrapper]** Add macOS support: Apple Silicon (arm64) and Intel (x64) binary downloads
+- **[wrapper]** Add GPG-signed release workflow via GitHub Actions
+- **[wrapper]** Fix macOS binary download: preserve `.app` symlinks, remove quarantine xattrs
+- **[wrapper]** Add real bot detection assertions to stealth tests
+- **[wrapper]** Bump version to 0.2.0
+
+### 2026-02-26
+
+- **[wrapper]** Switch binary downloads to self-hosted mirror (`cloakbrowser.dev`) as GitHub backup
+- **[wrapper]** Set up GitLab mirror at `gitlab.com/CloakHQ/cloakbrowser`
+
+### 2026-02-25
+
+- **[wrapper]** Move binary releases from separate repo to wrapper repo
+- **[wrapper]** Add auto-update check on launch
+- **[infra]** Initial Docker test infrastructure + matrix test runner
+
+### 2026-02-24
+
+- **[wrapper]** Add JavaScript/TypeScript wrapper with Playwright + Puppeteer support (`npm install cloakbrowser`)
+- **[wrapper]** Fix proxy authentication credentials support in URL (closes #4)
+
+---
+
+## [0.1.4] — 2026-02-23
+
+### 2026-02-23
+
+- **[wrapper]** Stealth hardening: additional launch args and detection evasion improvements
+- **[wrapper]** Full test suite rewrite with real detection site assertions
+- **[wrapper]** Add Docker support with Dockerfile and compose config
+- **[wrapper]** Add headed mode documentation
+
+---
+
+## [0.1.0] — 2026-02-22
+
+Initial release. Chromium v142 with 16 fingerprint patches.
+
+### 2026-02-22
+
+- **[binary]** Chromium v142.0.7444.175 with 16 source-level fingerprint patches
+- **[binary]** Fix browser brand string to match Chrome 142 format
+- **[wrapper]** `launch()` and `launch_async()` — drop-in Playwright replacements
+- **[wrapper]** Auto-download binary from GitHub Releases, cached in `~/.cloakbrowser/`
+- **[wrapper]** Linux x64 platform support
+- **[wrapper]** Passes 14/14 bot detection tests
+- **[wrapper]** reCAPTCHA v3: 0.9 (server-verified), Cloudflare Turnstile: pass

Dockerfile

@@ -1,6 +1,6 @@
 FROM python:3.12-slim
 
-# Chromium system deps (matches fingerprint-chromium 142+ requirements)
+# Chromium system deps + Node.js
 RUN apt-get update && apt-get install -y --no-install-recommends \
     libnss3 libnspr4 libatk1.0-0 libatk-bridge2.0-0 libcups2 \
     libdbus-1-3 libdrm2 libxkbcommon0 libatspi2.0-0 libxcomposite1 \
@@ -9,16 +9,43 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libxcb1 libxext6 libxshmfence1 \
     libglib2.0-0 libgtk-3-0 libpangocairo-1.0-0 libcairo-gobject2 \
     libgdk-pixbuf-2.0-0 libxss1 libxtst6 fonts-liberation \
+    xvfb xdotool \
+    curl ca-certificates \
+    && curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
+    && apt-get install -y --no-install-recommends nodejs \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
 
-COPY pyproject.toml README.md LICENSE ./
+# Python wrapper
+COPY pyproject.toml README.md LICENSE BINARY-LICENSE.md CHANGELOG.md ./
 COPY cloakbrowser/ cloakbrowser/
-
 RUN pip install --no-cache-dir .
 
-# Pre-download stealth Chromium binary during build (not at runtime)
-RUN python -c "from cloakbrowser import ensure_binary; ensure_binary()"
+# JS wrapper
+COPY js/ js/
+RUN cd js && npm install && npm run build
 
+# Examples
+COPY examples/ examples/
+
+# Pre-download stealth Chromium binary during build (not at runtime)
+# Remove welcome marker so users see it on first container run
+RUN python -c "from cloakbrowser import ensure_binary; ensure_binary()" \
+    && rm -f ~/.cloakbrowser/.welcome_shown
+
+# CLI shortcuts
+COPY bin/cloaktest /usr/local/bin/cloaktest
+COPY bin/cloakserve /usr/local/bin/cloakserve
+RUN chmod +x /usr/local/bin/cloaktest /usr/local/bin/cloakserve
+
+EXPOSE 9222
+
+# Xvfb entrypoint for headed mode support
+COPY bin/docker-entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+ENV DISPLAY=:99
+
+ENTRYPOINT ["/entrypoint.sh"]
 CMD ["python"]

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2026 cloakbrowser
+Copyright (c) 2026 CloakHQ
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

bin/cloakserve

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+"""Launch stealth Chromium as a CDP server for remote connections.
+
+Usage:
+    cloakserve                          # headless on port 9222
+    cloakserve --headless=false         # headed (uses Xvfb in Docker)
+    cloakserve --proxy-server=host:port # with proxy
+
+Connect from host:
+    playwright.chromium.connect_over_cdp("http://localhost:9222")
+"""
+import signal
+import subprocess
+import sys
+import time
+
+from cloakbrowser.config import get_default_stealth_args
+from cloakbrowser.download import ensure_binary
+
+PORT = 9222
+
+binary = ensure_binary()
+
+chrome_args = [
+    binary,
+    f"--remote-debugging-port={PORT}",
+    "--remote-debugging-address=0.0.0.0",
+    # Sane defaults for running Chrome directly (outside Playwright)
+    "--no-first-run",
+    "--no-default-browser-check",
+    "--disable-dev-shm-usage",
+    "--disable-extensions",
+    "--disable-popup-blocking",
+    "--disable-background-networking",
+    "--metrics-recording-only",
+] + get_default_stealth_args() + sys.argv[1:]
+
+chrome = subprocess.Popen(chrome_args)
+
+time.sleep(2)
+
+print(f"CloakBrowser CDP server ready on port {PORT}", flush=True)
+
+
+def cleanup(sig, frame):
+    chrome.terminate()
+    sys.exit(0)
+
+
+signal.signal(signal.SIGTERM, cleanup)
+signal.signal(signal.SIGINT, cleanup)
+
+chrome.wait()

bin/cloaktest

@@ -0,0 +1,3 @@
+#!/bin/bash
+# Run CloakBrowser stealth test suite
+exec python -u /app/examples/stealth_test.py --no-screenshots "$@"

bin/docker-entrypoint.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+# Start Xvfb for headed mode (Turnstile, CAPTCHAs), then run user command
+Xvfb :99 -screen 0 1920x1080x24 -nolisten tcp &
+sleep 1
+exec "$@"

cloakbrowser/__init__.py

@@ -11,19 +11,38 @@ Usage:
     browser.close()
 """
 
-from .browser import launch, launch_async, launch_context
+from .browser import launch, launch_async, launch_context, launch_persistent_context, launch_persistent_context_async, ProxySettings
 from .config import CHROMIUM_VERSION, get_default_stealth_args
-from .download import binary_info, clear_cache, ensure_binary
+from .download import binary_info, check_for_update, clear_cache, ensure_binary
 from ._version import __version__
 
+# Human-like behavioral layer (optional)
+def __getattr__(name):
+    if name == "HumanConfig":
+        from .human.config import HumanConfig
+        globals()["HumanConfig"] = HumanConfig
+        return HumanConfig
+    if name == "resolve_human_config":
+        from .human.config import resolve_config
+        globals()["resolve_human_config"] = resolve_config
+        return resolve_config
+    raise AttributeError(f"module 'cloakbrowser' has no attribute {name}")
+
 __all__ = [
     "launch",
     "launch_async",
     "launch_context",
+    "launch_persistent_context",
+    "launch_persistent_context_async",
     "ensure_binary",
     "clear_cache",
     "binary_info",
+    "check_for_update",
     "CHROMIUM_VERSION",
     "get_default_stealth_args",
+    "ProxySettings",
+    "HumanConfig",
+    "resolve_human_config",
     "__version__",
 ]
+

cloakbrowser/__main__.py

@@ -0,0 +1,111 @@
+"""CLI for cloakbrowser — download and manage the stealth Chromium binary.
+
+Usage:
+    python -m cloakbrowser install      # Download binary (with progress)
+    python -m cloakbrowser info         # Show binary version, path, platform
+    python -m cloakbrowser update       # Check for and download newer binary
+    python -m cloakbrowser clear-cache  # Remove cached binaries
+"""
+
+from __future__ import annotations
+
+import argparse
+import logging
+import sys
+
+
+def _setup_logging() -> None:
+    """Route cloakbrowser logger to stderr with clean output."""
+    logging.basicConfig(
+        level=logging.INFO,
+        format="%(message)s",
+        stream=sys.stderr,
+        force=True,
+    )
+    # Suppress noisy HTTP request logs from httpx
+    logging.getLogger("httpx").setLevel(logging.WARNING)
+
+
+def cmd_install(args: argparse.Namespace) -> None:
+    from .download import ensure_binary
+
+    path = ensure_binary()
+    print(path)
+
+
+def cmd_info(args: argparse.Namespace) -> None:
+    from .config import get_local_binary_override
+    from .download import binary_info
+
+    info = binary_info()
+    override = get_local_binary_override()
+
+    print(f"Version:   {info['version']}")
+    print(f"Platform:  {info['platform']}")
+    print(f"Binary:    {info['binary_path']}")
+    print(f"Installed: {info['installed']}")
+    print(f"Cache:     {info['cache_dir']}")
+    if override:
+        print(f"Override:  {override} (CLOAKBROWSER_BINARY_PATH)")
+
+
+def cmd_update(args: argparse.Namespace) -> None:
+    from .download import check_for_update
+
+    logger = logging.getLogger("cloakbrowser")
+    logger.info("Checking for updates...")
+    new_version = check_for_update()
+    if new_version:
+        print(f"Updated to Chromium {new_version}")
+    else:
+        print("Already up to date.")
+
+
+def cmd_clear_cache(args: argparse.Namespace) -> None:
+    from .config import get_cache_dir
+    from .download import clear_cache
+
+    if not get_cache_dir().exists():
+        print("No cache to clear.")
+        return
+    clear_cache()
+    print("Cache cleared.")
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(
+        prog="cloakbrowser",
+        description="Manage the CloakBrowser stealth Chromium binary.",
+    )
+    sub = parser.add_subparsers(dest="command")
+
+    sub.add_parser("install", help="Download the Chromium binary")
+    sub.add_parser("info", help="Show binary version, path, and platform")
+    sub.add_parser("update", help="Check for and download a newer binary")
+    sub.add_parser("clear-cache", help="Remove all cached binaries")
+
+    args = parser.parse_args()
+    if not args.command:
+        parser.print_help()
+        sys.exit(2)
+
+    _setup_logging()
+
+    commands = {
+        "install": cmd_install,
+        "info": cmd_info,
+        "update": cmd_update,
+        "clear-cache": cmd_clear_cache,
+    }
+
+    try:
+        commands[args.command](args)
+    except KeyboardInterrupt:
+        sys.exit(130)
+    except Exception as e:
+        print(f"Error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()

cloakbrowser/_version.py

@@ -1 +1 @@
-__version__ = "0.1.5"
+__version__ = "0.3.17"

cloakbrowser/browser.py

@@ -15,29 +15,76 @@ Usage:
 from __future__ import annotations
 
 import logging
-from typing import Any
+import os
+from typing import Any, Literal, TypedDict
+from urllib.parse import unquote, urlparse, urlunparse
 
-from .config import get_default_stealth_args
+from .config import DEFAULT_VIEWPORT, IGNORE_DEFAULT_ARGS, get_default_stealth_args
 from .download import ensure_binary
 
 logger = logging.getLogger("cloakbrowser")
 
 
+def _resolve_timezone(timezone: str | None, kwargs: dict[str, Any]) -> str | None:
+    """Accept both timezone and timezone_id — either works, no warning."""
+    if "timezone_id" in kwargs:
+        if timezone is None:
+            timezone = kwargs.pop("timezone_id")
+        else:
+            kwargs.pop("timezone_id")
+    return timezone
+
+
+class _ProxySettingsRequired(TypedDict):
+    server: str
+
+
+class ProxySettings(_ProxySettingsRequired, total=False):
+    """Playwright-compatible proxy configuration."""
+
+    bypass: str
+    username: str
+    password: str
+
+
 def launch(
     headless: bool = True,
-    proxy: str | None = None,
+    proxy: str | ProxySettings | None = None,
     args: list[str] | None = None,
     stealth_args: bool = True,
+    timezone: str | None = None,
+    locale: str | None = None,
+    geoip: bool = False,
+    backend: str | None = None,
+    humanize: bool = False,
+    human_preset: str = "default",
+    human_config: dict | None = None,
     **kwargs: Any,
 ) -> Any:
     """Launch stealth Chromium browser. Returns a Playwright Browser object.
 
     Args:
         headless: Run in headless mode (default True).
-        proxy: Proxy server URL (e.g. 'http://proxy:8080' or 'socks5://proxy:1080').
+        proxy: Proxy URL string or Playwright proxy dict.
+            String: 'http://user:pass@proxy:8080' (credentials auto-extracted).
+            Dict: {"server": "http://proxy:8080", "bypass": ".google.com", ...}
+            — passed directly to Playwright.
         args: Additional Chromium CLI arguments to pass.
         stealth_args: Include default stealth fingerprint args (default True).
             Set to False if you want to pass your own --fingerprint flags.
+        timezone: IANA timezone (e.g. 'America/New_York'). Sets --fingerprint-timezone binary flag.
+        locale: BCP 47 locale (e.g. 'en-US'). Sets --lang binary flag.
+        geoip: Auto-detect timezone/locale from proxy IP (default False).
+            Requires ``pip install cloakbrowser[geoip]``. Downloads ~70 MB
+            GeoLite2-City database on first use.  Explicit timezone/locale
+            always override geoip results.
+        backend: Playwright backend — 'playwright' (default) or 'patchright'.
+            Patchright suppresses CDP signals (helps reCAPTCHA v3 Enterprise)
+            but breaks proxy auth and add_init_script.
+            Override globally with CLOAKBROWSER_BACKEND env var.
+        humanize: Enable human-like mouse, keyboard, scroll behavior (default False).
+        human_preset: Humanize preset — 'default' or 'careful' (default 'default').
+        human_config: Custom humanize config dict to override preset values.
         **kwargs: Passed directly to playwright.chromium.launch().
 
     Returns:
@@ -51,10 +98,11 @@ def launch(
         >>> print(page.title())
         >>> browser.close()
     """
-    from playwright.sync_api import sync_playwright
+    sync_playwright = _import_sync_playwright(_resolve_backend(backend))
 
     binary_path = ensure_binary()
-    chrome_args = _build_args(stealth_args, args)
+    timezone, locale = _maybe_resolve_geoip(geoip, proxy, timezone, locale)
+    chrome_args = _build_args(stealth_args, args, timezone=timezone, locale=locale, headless=headless)
 
     logger.debug("Launching stealth Chromium (headless=%s, args=%d)", headless, len(chrome_args))
 
@@ -63,7 +111,7 @@ def launch(
         executable_path=binary_path,
         headless=headless,
         args=chrome_args,
-        ignore_default_args=["--enable-automation"],
+        ignore_default_args=IGNORE_DEFAULT_ARGS,
         **_build_proxy_kwargs(proxy),
         **kwargs,
     )
@@ -77,23 +125,44 @@ def launch(
 
     browser.close = _close_with_cleanup
 
+    # Human-like behavioral patching
+    if humanize:
+        from .human import patch_browser
+        from .human.config import resolve_config
+        cfg = resolve_config(human_preset, human_config)
+        patch_browser(browser, cfg)
+
     return browser
 
 
-async def launch_async(
+async def launch_async(  # noqa: C901
     headless: bool = True,
-    proxy: str | None = None,
+    proxy: str | ProxySettings | None = None,
     args: list[str] | None = None,
     stealth_args: bool = True,
+    timezone: str | None = None,
+    locale: str | None = None,
+    geoip: bool = False,
+    backend: str | None = None,
+    humanize: bool = False,
+    human_preset: str = "default",
+    human_config: dict | None = None,
     **kwargs: Any,
 ) -> Any:
     """Async version of launch(). Returns a Playwright Browser object.
 
     Args:
         headless: Run in headless mode (default True).
-        proxy: Proxy server URL (e.g. 'http://proxy:8080' or 'socks5://proxy:1080').
+        proxy: Proxy URL string or Playwright proxy dict (see launch() for details).
         args: Additional Chromium CLI arguments to pass.
         stealth_args: Include default stealth fingerprint args (default True).
+        timezone: IANA timezone (e.g. 'America/New_York'). Sets --fingerprint-timezone binary flag.
+        locale: BCP 47 locale (e.g. 'en-US'). Sets --lang binary flag.
+        geoip: Auto-detect timezone/locale from proxy IP (default False).
+        backend: Playwright backend — 'playwright' (default) or 'patchright'.
+        humanize: Enable human-like mouse, keyboard, scroll behavior (default False).
+        human_preset: Humanize preset — 'default' or 'careful' (default 'default').
+        human_config: Custom humanize config dict to override preset values.
         **kwargs: Passed directly to playwright.chromium.launch().
 
     Returns:
@@ -112,10 +181,11 @@ async def launch_async(
         >>>
         >>> asyncio.run(main())
     """
-    from playwright.async_api import async_playwright
+    async_playwright = _import_async_playwright(_resolve_backend(backend))
 
     binary_path = ensure_binary()
-    chrome_args = _build_args(stealth_args, args)
+    timezone, locale = _maybe_resolve_geoip(geoip, proxy, timezone, locale)
+    chrome_args = _build_args(stealth_args, args, timezone=timezone, locale=locale, headless=headless)
 
     logger.debug("Launching stealth Chromium async (headless=%s, args=%d)", headless, len(chrome_args))
 
@@ -124,7 +194,7 @@ async def launch_async(
         executable_path=binary_path,
         headless=headless,
         args=chrome_args,
-        ignore_default_args=["--enable-automation"],
+        ignore_default_args=IGNORE_DEFAULT_ARGS,
         **_build_proxy_kwargs(proxy),
         **kwargs,
     )
@@ -138,18 +208,255 @@ async def launch_async(
 
     browser.close = _close_with_cleanup
 
+    # Human-like behavioral patching (async variant)
+    if humanize:
+        from .human import patch_browser_async
+        from .human.config import resolve_config
+        cfg = resolve_config(human_preset, human_config)
+        patch_browser_async(browser, cfg)
+
     return browser
 
 
-def launch_context(
+def launch_persistent_context(
+    user_data_dir: str | os.PathLike,
     headless: bool = True,
-    proxy: str | None = None,
+    proxy: str | ProxySettings | None = None,
     args: list[str] | None = None,
     stealth_args: bool = True,
     user_agent: str | None = None,
     viewport: dict | None = None,
     locale: str | None = None,
-    timezone_id: str | None = None,
+    timezone: str | None = None,
+    color_scheme: Literal["light", "dark", "no-preference"] | None = None,
+    geoip: bool = False,
+    backend: str | None = None,
+    humanize: bool = False,
+    human_preset: str = "default",
+    human_config: dict | None = None,
+    **kwargs: Any,
+) -> Any:
+    """Launch stealth browser with a persistent profile and return a BrowserContext.
+
+    This persists cookies, localStorage, cache, and other browser state across
+    sessions by storing them in ``user_data_dir``. Also avoids incognito detection
+    by services like BrowserScan (-10% penalty).
+
+    Args:
+        user_data_dir: Path to the directory where browser profile data is stored.
+            Created automatically if it doesn't exist. Reuse the same path across
+            sessions to restore cookies, localStorage, cached credentials, etc.
+        headless: Run in headless mode (default True).
+        proxy: Proxy URL string or Playwright proxy dict (see launch() for details).
+        args: Additional Chromium CLI arguments.
+        stealth_args: Include default stealth fingerprint args (default True).
+        user_agent: Custom user agent string.
+        viewport: Viewport size dict, e.g. {"width": 1920, "height": 1080}.
+        locale: Browser locale, e.g. "en-US".
+        timezone: IANA timezone (e.g. 'America/New_York').
+        color_scheme: Color scheme preference — 'light', 'dark', or 'no-preference'.
+            Default: None (uses Chromium default, which is 'light').
+        geoip: Auto-detect timezone/locale from proxy IP (default False).
+            Requires ``pip install cloakbrowser[geoip]``.
+        backend: Playwright backend — 'playwright' (default) or 'patchright'.
+        humanize: Enable human-like mouse, keyboard, scroll behavior (default False).
+        human_preset: Humanize preset — 'default' or 'careful' (default 'default').
+        human_config: Custom humanize config dict to override preset values.
+        **kwargs: Passed directly to playwright.chromium.launch_persistent_context().
+
+    Returns:
+        Playwright BrowserContext object backed by a persistent profile.
+        Call ``.close()`` when done — this also stops the Playwright instance.
+
+    Example:
+        >>> from cloakbrowser import launch_persistent_context
+        >>> ctx = launch_persistent_context("./my-profile", headless=False)
+        >>> page = ctx.new_page()
+        >>> page.goto("https://protected-site.com")
+        >>> ctx.close()  # Profile is saved; re-use path next run to restore state.
+    """
+    sync_playwright = _import_sync_playwright(_resolve_backend(backend))
+
+    timezone = _resolve_timezone(timezone, kwargs)
+
+    binary_path = ensure_binary()
+    timezone, locale = _maybe_resolve_geoip(geoip, proxy, timezone, locale)
+    chrome_args = _build_args(stealth_args, args, timezone=timezone, locale=locale, headless=headless)
+
+    logger.debug(
+        "Launching persistent stealth Chromium (headless=%s, user_data_dir=%s)",
+        headless,
+        user_data_dir,
+    )
+
+    # locale and timezone are set via binary flags (--lang, --fingerprint-timezone)
+    # — NOT via Playwright context kwargs which use detectable CDP emulation.
+    context_kwargs: dict[str, Any] = {}
+    if user_agent:
+        context_kwargs["user_agent"] = user_agent
+    context_kwargs["viewport"] = viewport or DEFAULT_VIEWPORT
+    if color_scheme:
+        context_kwargs["color_scheme"] = color_scheme
+    context_kwargs.update(kwargs)
+
+    pw = sync_playwright().start()
+    context = pw.chromium.launch_persistent_context(
+        user_data_dir=os.fspath(user_data_dir),
+        executable_path=binary_path,
+        headless=headless,
+        args=chrome_args,
+        ignore_default_args=IGNORE_DEFAULT_ARGS,
+        **_build_proxy_kwargs(proxy),
+        **context_kwargs,
+    )
+
+    # Patch close() to also stop the Playwright instance
+    _original_close = context.close
+
+    def _close_with_cleanup() -> None:
+        _original_close()
+        pw.stop()
+
+    context.close = _close_with_cleanup
+
+    # Human-like behavioral patching
+    if humanize:
+        from .human import patch_context
+        from .human.config import resolve_config
+        cfg = resolve_config(human_preset, human_config)
+        patch_context(context, cfg)
+
+    return context
+
+
+async def launch_persistent_context_async(
+    user_data_dir: str | os.PathLike,
+    headless: bool = True,
+    proxy: str | ProxySettings | None = None,
+    args: list[str] | None = None,
+    stealth_args: bool = True,
+    user_agent: str | None = None,
+    viewport: dict | None = None,
+    locale: str | None = None,
+    timezone: str | None = None,
+    color_scheme: Literal["light", "dark", "no-preference"] | None = None,
+    geoip: bool = False,
+    backend: str | None = None,
+    humanize: bool = False,
+    human_preset: str = "default",
+    human_config: dict | None = None,
+    **kwargs: Any,
+) -> Any:
+    """Async version of launch_persistent_context().
+
+    Launch stealth browser with a persistent profile and return a BrowserContext.
+    This persists cookies, localStorage, cache, and other browser state across
+    sessions by storing them in ``user_data_dir``.
+
+    Args:
+        user_data_dir: Path to the directory where browser profile data is stored.
+            Created automatically if it doesn't exist.
+        headless: Run in headless mode (default True).
+        proxy: Proxy URL string or Playwright proxy dict (see launch() for details).
+        args: Additional Chromium CLI arguments.
+        stealth_args: Include default stealth fingerprint args (default True).
+        user_agent: Custom user agent string.
+        viewport: Viewport size dict, e.g. {"width": 1920, "height": 1080}.
+        locale: Browser locale, e.g. "en-US".
+        timezone: IANA timezone (e.g. 'America/New_York').
+        color_scheme: Color scheme preference — 'light', 'dark', or 'no-preference'.
+        geoip: Auto-detect timezone/locale from proxy IP (default False).
+        backend: Playwright backend — 'playwright' (default) or 'patchright'.
+        humanize: Enable human-like mouse, keyboard, scroll behavior (default False).
+        human_preset: Humanize preset — 'default' or 'careful' (default 'default').
+        human_config: Custom humanize config dict to override preset values.
+        **kwargs: Passed directly to playwright.chromium.launch_persistent_context().
+
+    Returns:
+        Playwright BrowserContext object backed by a persistent profile (async API).
+        Call ``await .close()`` when done.
+
+    Example:
+        >>> import asyncio
+        >>> from cloakbrowser import launch_persistent_context_async
+        >>>
+        >>> async def main():
+        ...     ctx = await launch_persistent_context_async("./my-profile", headless=False)
+        ...     page = await ctx.new_page()
+        ...     await page.goto("https://protected-site.com")
+        ...     await ctx.close()
+        >>>
+        >>> asyncio.run(main())
+    """
+    async_playwright = _import_async_playwright(_resolve_backend(backend))
+
+    timezone = _resolve_timezone(timezone, kwargs)
+
+    binary_path = ensure_binary()
+    timezone, locale = _maybe_resolve_geoip(geoip, proxy, timezone, locale)
+    chrome_args = _build_args(stealth_args, args, timezone=timezone, locale=locale, headless=headless)
+
+    logger.debug(
+        "Launching persistent stealth Chromium async (headless=%s, user_data_dir=%s)",
+        headless,
+        user_data_dir,
+    )
+
+    # locale and timezone are set via binary flags (--lang, --fingerprint-timezone)
+    # — NOT via Playwright context kwargs which use detectable CDP emulation.
+    context_kwargs: dict[str, Any] = {}
+    if user_agent:
+        context_kwargs["user_agent"] = user_agent
+    context_kwargs["viewport"] = viewport or DEFAULT_VIEWPORT
+    if color_scheme:
+        context_kwargs["color_scheme"] = color_scheme
+    context_kwargs.update(kwargs)
+
+    pw = await async_playwright().start()
+    context = await pw.chromium.launch_persistent_context(
+        user_data_dir=os.fspath(user_data_dir),
+        executable_path=binary_path,
+        headless=headless,
+        args=chrome_args,
+        ignore_default_args=IGNORE_DEFAULT_ARGS,
+        **_build_proxy_kwargs(proxy),
+        **context_kwargs,
+    )
+
+    # Patch close() to also stop the Playwright instance
+    _original_close = context.close
+
+    async def _close_with_cleanup() -> None:
+        await _original_close()
+        await pw.stop()
+
+    context.close = _close_with_cleanup
+
+    # Human-like behavioral patching (async variant)
+    if humanize:
+        from .human import patch_context_async
+        from .human.config import resolve_config
+        cfg = resolve_config(human_preset, human_config)
+        patch_context_async(context, cfg)
+
+    return context
+
+
+def launch_context(
+    headless: bool = True,
+    proxy: str | ProxySettings | None = None,
+    args: list[str] | None = None,
+    stealth_args: bool = True,
+    user_agent: str | None = None,
+    viewport: dict | None = None,
+    locale: str | None = None,
+    timezone: str | None = None,
+    color_scheme: Literal["light", "dark", "no-preference"] | None = None,
+    geoip: bool = False,
+    backend: str | None = None,
+    humanize: bool = False,
+    human_preset: str = "default",
+    human_config: dict | None = None,
     **kwargs: Any,
 ) -> Any:
     """Launch stealth browser and return a BrowserContext with common options pre-set.
@@ -159,29 +466,42 @@ def launch_context(
 
     Args:
         headless: Run in headless mode (default True).
-        proxy: Proxy server URL.
+        proxy: Proxy URL string or Playwright proxy dict (see launch() for details).
         args: Additional Chromium CLI arguments.
         stealth_args: Include default stealth fingerprint args (default True).
         user_agent: Custom user agent string.
         viewport: Viewport size dict, e.g. {"width": 1920, "height": 1080}.
         locale: Browser locale, e.g. "en-US".
-        timezone_id: Timezone, e.g. "America/New_York".
+        timezone: IANA timezone (e.g. 'America/New_York').
+        color_scheme: Color scheme preference — 'light', 'dark', or 'no-preference'.
+            Default: None (uses Chromium default, which is 'light').
+        geoip: Auto-detect timezone/locale from proxy IP (default False).
+        backend: Playwright backend — 'playwright' (default) or 'patchright'.
+        humanize: Enable human-like mouse, keyboard, scroll behavior (default False).
+        human_preset: Humanize preset — 'default' or 'careful' (default 'default').
+        human_config: Custom humanize config dict to override preset values.
         **kwargs: Passed to browser.new_context().
 
     Returns:
         Playwright BrowserContext object.
     """
-    browser = launch(headless=headless, proxy=proxy, args=args, stealth_args=stealth_args)
+    timezone = _resolve_timezone(timezone, kwargs)
+
+    # Resolve geoip BEFORE launch() to avoid double-resolution and ensure
+    # resolved values flow to binary flags
+    timezone, locale = _maybe_resolve_geoip(geoip, proxy, timezone, locale)
+    # --fingerprint-timezone is process-wide (reads CommandLine in renderer),
+    # so it applies to ALL contexts, not just the default one.
+    # locale and timezone are set via binary flags only — no CDP emulation.
+    browser = launch(headless=headless, proxy=proxy, args=args, stealth_args=stealth_args,
+                     timezone=timezone, locale=locale, backend=backend)
 
     context_kwargs: dict[str, Any] = {}
     if user_agent:
         context_kwargs["user_agent"] = user_agent
-    if viewport:
-        context_kwargs["viewport"] = viewport
-    if locale:
-        context_kwargs["locale"] = locale
-    if timezone_id:
-        context_kwargs["timezone_id"] = timezone_id
+    context_kwargs["viewport"] = viewport or DEFAULT_VIEWPORT
+    if color_scheme:
+        context_kwargs["color_scheme"] = color_scheme
     context_kwargs.update(kwargs)
 
     try:
@@ -199,26 +519,179 @@ def launch_context(
 
     context.close = _close_context_with_cleanup
 
+    # Human-like behavioral patching
+    if humanize:
+        from .human import patch_context
+        from .human.config import resolve_config
+        cfg = resolve_config(human_preset, human_config)
+        patch_context(context, cfg)
+
     return context
 
 
+# ---------------------------------------------------------------------------
+# Backend resolution
+# ---------------------------------------------------------------------------
+
+
+def _resolve_backend(backend: str | None) -> str:
+    """Resolve backend: param > env var > default ('playwright')."""
+    b = backend or os.environ.get("CLOAKBROWSER_BACKEND", "playwright")
+    if b not in ("playwright", "patchright"):
+        raise ValueError(f"Unknown backend '{b}'. Use 'playwright' or 'patchright'.")
+    return b
+
+
+def _import_sync_playwright(backend: str):
+    """Import sync_playwright from the resolved backend."""
+    if backend == "patchright":
+        try:
+            from patchright.sync_api import sync_playwright
+        except ModuleNotFoundError:
+            raise ModuleNotFoundError(
+                "patchright is not installed. Install it with: pip install cloakbrowser[patchright]"
+            ) from None
+        return sync_playwright
+    from playwright.sync_api import sync_playwright
+    return sync_playwright
+
+
+def _import_async_playwright(backend: str):
+    """Import async_playwright from the resolved backend."""
+    if backend == "patchright":
+        try:
+            from patchright.async_api import async_playwright
+        except ModuleNotFoundError:
+            raise ModuleNotFoundError(
+                "patchright is not installed. Install it with: pip install cloakbrowser[patchright]"
+            ) from None
+        return async_playwright
+    from playwright.async_api import async_playwright
+    return async_playwright
+
+
 # ---------------------------------------------------------------------------
 # Internal helpers
 # ---------------------------------------------------------------------------
 
 
-def _build_args(stealth_args: bool, extra_args: list[str] | None) -> list[str]:
-    """Combine stealth args with user-provided args."""
-    result = []
+def _ensure_proxy_scheme(proxy_url: str) -> str:
+    """Prepend http:// to schemeless proxy URLs so parsers can extract hostname."""
+    return proxy_url if "://" in proxy_url else f"http://{proxy_url}"
+
+
+def _maybe_resolve_geoip(
+    geoip: bool,
+    proxy: str | ProxySettings | None,
+    timezone: str | None,
+    locale: str | None,
+) -> tuple[str | None, str | None]:
+    """Auto-fill timezone/locale from proxy IP when geoip is enabled."""
+    if not geoip or not proxy or (timezone is not None and locale is not None):
+        return timezone, locale
+
+    from .geoip import resolve_proxy_geo
+
+    proxy_url = proxy.get("server") if isinstance(proxy, dict) else proxy
+    if not proxy_url:
+        return timezone, locale
+    proxy_url = _ensure_proxy_scheme(proxy_url)
+    geo_tz, geo_locale = resolve_proxy_geo(proxy_url)
+    if timezone is None:
+        timezone = geo_tz
+    if locale is None:
+        locale = geo_locale
+    return timezone, locale
+
+
+def _build_args(
+    stealth_args: bool,
+    extra_args: list[str] | None,
+    timezone: str | None = None,
+    locale: str | None = None,
+    headless: bool = True,
+) -> list[str]:
+    """Combine stealth args with user-provided args and locale flags.
+
+    Deduplicates by flag key (everything before '=').
+    Priority: stealth defaults < user args < dedicated params (timezone/locale).
+    """
+    seen: dict[str, str] = {}
+
     if stealth_args:
-        result.extend(get_default_stealth_args())
+        for arg in get_default_stealth_args():
+            seen[arg.split("=", 1)[0]] = arg
+
+    # GPU blocklist bypass:
+    # - Headed mode (all platforms): Chromium blocks WebGL on software GPUs
+    #   in Docker/Xvfb. Flag lets SwiftShader serve WebGL. See issue #56.
+    # - Windows (all modes): Chromium's GPU blocklist blocks WebGPU for the
+    #   Microsoft Basic Render Driver. Dawn's adapter_blocklist bypass alone
+    #   isn't enough — need this flag too. Linux doesn't need it.
+    import platform as _platform
+    if not headless or _platform.system() == "Windows":
+        seen["--ignore-gpu-blocklist"] = "--ignore-gpu-blocklist"
+
     if extra_args:
-        result.extend(extra_args)
+        for arg in extra_args:
+            key = arg.split("=", 1)[0]
+            if key in seen:
+                logger.debug("Arg override: %s -> %s", seen[key], arg)
+            seen[key] = arg
+
+    # Timezone/locale flags are independent of stealth_args — always inject when set
+    if timezone:
+        key = "--fingerprint-timezone"
+        flag = f"{key}={timezone}"
+        if key in seen:
+            logger.debug("Arg override: %s -> %s", seen[key], flag)
+        seen[key] = flag
+    if locale:
+        for key in ("--lang", "--fingerprint-locale"):
+            flag = f"{key}={locale}"
+            if key in seen:
+                logger.debug("Arg override: %s -> %s", seen[key], flag)
+            seen[key] = flag
+
+    return list(seen.values())
+
+
+def _parse_proxy_url(proxy: str) -> dict[str, Any]:
+    """Parse proxy URL, extracting credentials into separate Playwright fields.
+
+    Handles: http://user:pass@host:port -> {server: "http://host:port", username: "user", password: "pass"}
+    Also handles: no credentials, URL-encoded special chars, socks5://, missing port,
+    and bare proxy strings without a scheme (e.g. 'user:pass@host:port' -> treated as http).
+    """
+    # Bare format: "user:pass@host:port" — urlparse needs a scheme to extract credentials.
+    normalized = proxy
+    if "@" in proxy and "://" not in proxy:
+        normalized = f"http://{proxy}"
+
+    parsed = urlparse(normalized)
+
+    if not parsed.username:
+        return {"server": proxy}  # no creds — return original unchanged
+
+    # Rebuild server URL without credentials
+    netloc = parsed.hostname or ""
+    if parsed.port:
+        netloc += f":{parsed.port}"
+
+    server = urlunparse((parsed.scheme, netloc, parsed.path, "", "", ""))
+
+    result: dict[str, Any] = {"server": server}
+    result["username"] = unquote(parsed.username)
+    if parsed.password:
+        result["password"] = unquote(parsed.password)
+
     return result
 
 
-def _build_proxy_kwargs(proxy: str | None) -> dict[str, Any]:
+def _build_proxy_kwargs(proxy: str | ProxySettings | None) -> dict[str, Any]:
     """Build proxy kwargs for Playwright launch."""
     if proxy is None:
         return {}
-    return {"proxy": {"server": proxy}}
+    if isinstance(proxy, dict):
+        return {"proxy": proxy}
+    return {"proxy": _parse_proxy_url(proxy)}

cloakbrowser/config.py

@@ -10,27 +10,73 @@ from pathlib import Path
 from ._version import __version__
 
 # ---------------------------------------------------------------------------
-# Chromium version shipped with this release
+# Chromium version shipped with this release.
+# Different platforms may ship different versions during transition periods.
+# CHROMIUM_VERSION is the latest across all platforms (for display/reference).
+# Use get_chromium_version() for the current platform's actual version.
 # ---------------------------------------------------------------------------
-CHROMIUM_VERSION = "142.0.7444.175"
+CHROMIUM_VERSION = "145.0.7632.159.7"
+
+PLATFORM_CHROMIUM_VERSIONS: dict[str, str] = {
+    "linux-x64": "145.0.7632.159.7",
+    "linux-arm64": "145.0.7632.159.7",
+    "darwin-arm64": "145.0.7632.109.2",
+    "darwin-x64": "145.0.7632.109.2",
+    "windows-x64": "145.0.7632.159.7",
+}
+
+# ---------------------------------------------------------------------------
+# Playwright default args to suppress — these leak automation signals.
+# --enable-automation: exposes navigator.webdriver = true
+# --enable-unsafe-swiftshader: forces software WebGL rendering via SwiftShader,
+#   producing a distinctive renderer string that no real user browser has
+# ---------------------------------------------------------------------------
+IGNORE_DEFAULT_ARGS = ["--enable-automation", "--enable-unsafe-swiftshader"]
 
 # ---------------------------------------------------------------------------
 # Default stealth arguments passed to the patched Chromium binary.
 # These activate source-level fingerprint patches compiled into the binary.
 # ---------------------------------------------------------------------------
 def get_default_stealth_args() -> list[str]:
-    """Build stealth args with a random fingerprint seed per launch."""
+    """Build stealth args with a random fingerprint seed per launch.
+
+    On macOS, skips platform/GPU spoofing — runs as a native Mac browser.
+    Spoofing Windows on Mac creates detectable mismatches (fonts, GPU, etc.).
+    """
     seed = random.randint(10000, 99999)
-    return [
+    system = platform.system()
+
+    base = [
         "--no-sandbox",
         "--disable-blink-features=AutomationControlled",
         f"--fingerprint={seed}",
-        "--fingerprint-platform=windows",
-        "--fingerprint-hardware-concurrency=8",
-        "--fingerprint-gpu-vendor=NVIDIA Corporation",
-        "--fingerprint-gpu-renderer=NVIDIA GeForce RTX 3070",
     ]
 
+    if system == "Darwin":
+        # Tell the fingerprint patches we're on macOS so GPU/UA match natively
+        return base + [
+            "--fingerprint-platform=macos",
+            "--fingerprint-gpu-vendor=Google Inc. (Apple)",
+            "--fingerprint-gpu-renderer=ANGLE (Apple, ANGLE Metal Renderer: Apple M3, Unspecified Version)",
+        ]
+
+    # Linux/Windows: Windows fingerprint profile
+    # Hardware concurrency, device memory, screen, and window size are
+    # auto-generated by the binary from the seed (v14+).
+    return base + [
+        "--fingerprint-platform=windows",
+        "--fingerprint-gpu-vendor=Google Inc. (NVIDIA)",
+        "--fingerprint-gpu-renderer=ANGLE (NVIDIA, NVIDIA GeForce RTX 3070 (0x00002484) Direct3D11 vs_5_0 ps_5_0, D3D11)",
+    ]
+
+
+# ---------------------------------------------------------------------------
+# Default viewport — realistic maximized Chrome on 1080p Windows
+# screen=1920x1080, availHeight=1032 (minus 48px taskbar, binary default),
+# innerHeight=947 (minus ~85px Chrome UI: tabs + address bar + bookmarks)
+# ---------------------------------------------------------------------------
+DEFAULT_VIEWPORT = {"width": 1920, "height": 947}
+
 # ---------------------------------------------------------------------------
 # Platform detection
 # ---------------------------------------------------------------------------
@@ -39,8 +85,19 @@ SUPPORTED_PLATFORMS: dict[tuple[str, str], str] = {
     ("Linux", "aarch64"): "linux-arm64",
     ("Darwin", "arm64"): "darwin-arm64",
     ("Darwin", "x86_64"): "darwin-x64",
+    ("Windows", "AMD64"): "windows-x64",
+    ("Windows", "x86_64"): "windows-x64",
 }
 
+# Platforms with pre-built binaries available for download (derived from version map).
+AVAILABLE_PLATFORMS: set[str] = set(PLATFORM_CHROMIUM_VERSIONS.keys())
+
+
+def get_chromium_version() -> str:
+    """Return the Chromium version for the current platform."""
+    tag = get_platform_tag()
+    return PLATFORM_CHROMIUM_VERSIONS.get(tag, CHROMIUM_VERSION)
+
 
 def get_platform_tag() -> str:
     """Return the platform tag for binary download (e.g. 'linux-x64', 'darwin-arm64')."""
@@ -70,37 +127,113 @@ def get_cache_dir() -> Path:
     return Path.home() / ".cloakbrowser"
 
 
-def get_binary_dir() -> Path:
-    """Return the directory for the current Chromium version binary."""
-    return get_cache_dir() / f"chromium-{CHROMIUM_VERSION}"
+def get_binary_dir(version: str | None = None) -> Path:
+    """Return the directory for a Chromium version binary."""
+    v = version or get_chromium_version()
+    return get_cache_dir() / f"chromium-{v}"
 
 
-def get_binary_path() -> Path:
+def get_binary_path(version: str | None = None) -> Path:
     """Return the expected path to the chrome executable."""
-    platform_tag = get_platform_tag()
-    binary_dir = get_binary_dir()
+    binary_dir = get_binary_dir(version)
 
     if platform.system() == "Darwin":
         # macOS: Chromium.app bundle
         return binary_dir / "Chromium.app" / "Contents" / "MacOS" / "Chromium"
+    elif platform.system() == "Windows":
+        return binary_dir / "chrome.exe"
     else:
         # Linux: flat binary
         return binary_dir / "chrome"
 
 
+def check_platform_available() -> None:
+    """Raise a clear error if no pre-built binary exists for this platform.
+
+    Skipped when CLOAKBROWSER_BINARY_PATH is set (user has their own build).
+    """
+    if get_local_binary_override():
+        return
+
+    tag = get_platform_tag()  # raises if platform unsupported entirely
+    if tag not in AVAILABLE_PLATFORMS:
+        available = ", ".join(sorted(AVAILABLE_PLATFORMS))
+        import sys
+        sys.exit(
+            f"\n\033[1mCloakBrowser\033[0m — Pre-built binaries are currently only available for: {available}.\n\n"
+            f"To use CloakBrowser now, set CLOAKBROWSER_BINARY_PATH to a local Chromium binary."
+        )
+
+
+def get_effective_version() -> str:
+    """Return the best available version: auto-updated if available, else platform default.
+
+    Reads a platform-scoped marker file from the cache directory.
+    Returns the platform's hardcoded version if no update has been downloaded.
+    """
+    base = get_chromium_version()
+    # Try platform-scoped marker first, fall back to legacy marker for upgrades from <0.3.0
+    cache = get_cache_dir()
+    for name in (f"latest_version_{get_platform_tag()}", "latest_version"):
+        marker = cache / name
+        if marker.exists():
+            try:
+                version = marker.read_text().strip()
+                if version and _version_newer(version, base):
+                    binary = get_binary_path(version)
+                    if binary.exists():
+                        return version
+            except (ValueError, OSError):
+                pass
+    return base
+
+
+def _version_tuple(v: str) -> tuple[int, ...]:
+    """Parse '145.0.7718.0' into (145, 0, 7718, 0) for comparison."""
+    return tuple(int(x) for x in v.split("."))
+
+
+def _version_newer(a: str, b: str) -> bool:
+    """Return True if version a is strictly newer than version b."""
+    return _version_tuple(a) > _version_tuple(b)
+
+
 # ---------------------------------------------------------------------------
 # Download URL
 # ---------------------------------------------------------------------------
 DOWNLOAD_BASE_URL = os.environ.get(
     "CLOAKBROWSER_DOWNLOAD_URL",
-    "https://github.com/CloakHQ/chromium-stealth-builds/releases/download",
+    "https://cloakbrowser.dev",
+)
+
+GITHUB_API_URL = "https://api.github.com/repos/CloakHQ/cloakbrowser/releases"
+
+GITHUB_DOWNLOAD_BASE_URL = (
+    "https://github.com/CloakHQ/cloakbrowser/releases/download"
 )
 
 
-def get_download_url() -> str:
+def get_archive_ext() -> str:
+    """Return the archive extension for the current platform (.zip for Windows, .tar.gz otherwise)."""
+    return ".zip" if platform.system() == "Windows" else ".tar.gz"
+
+
+def get_archive_name(tag: str | None = None) -> str:
+    """Return the archive filename for a platform tag (e.g. 'cloakbrowser-linux-x64.tar.gz')."""
+    t = tag or get_platform_tag()
+    return f"cloakbrowser-{t}{get_archive_ext()}"
+
+
+def get_download_url(version: str | None = None) -> str:
     """Return the full download URL for the current platform's binary archive."""
-    tag = get_platform_tag()
-    return f"{DOWNLOAD_BASE_URL}/v{CHROMIUM_VERSION}/cloakbrowser-{tag}.tar.gz"
+    v = version or get_chromium_version()
+    return f"{DOWNLOAD_BASE_URL}/chromium-v{v}/{get_archive_name()}"
+
+
+def get_fallback_download_url(version: str | None = None) -> str:
+    """Return the GitHub Releases fallback URL for the binary archive."""
+    v = version or get_chromium_version()
+    return f"{GITHUB_DOWNLOAD_BASE_URL}/chromium-v{v}/{get_archive_name()}"
 
 
 # ---------------------------------------------------------------------------

cloakbrowser/download.py

@@ -6,20 +6,37 @@ Similar to how Playwright downloads its own bundled Chromium.
 
 from __future__ import annotations
 
+import hashlib
 import logging
 import os
+import platform
 import stat
+import subprocess
 import tarfile
 import tempfile
+import threading
+import time
 from pathlib import Path
 
 import httpx
 
+from ._version import __version__ as _wrapper_version
 from .config import (
     CHROMIUM_VERSION,
+    DOWNLOAD_BASE_URL,
+    GITHUB_API_URL,
+    GITHUB_DOWNLOAD_BASE_URL,
+    _version_newer,
+    check_platform_available,
+    get_archive_ext,
+    get_archive_name,
     get_binary_dir,
     get_binary_path,
+    get_cache_dir,
+    get_chromium_version,
     get_download_url,
+    get_effective_version,
+    get_fallback_download_url,
     get_local_binary_override,
     get_platform_tag,
 )
@@ -27,7 +44,30 @@ from .config import (
 logger = logging.getLogger("cloakbrowser")
 
 # Timeout for download (large binary, allow 10 min)
-DOWNLOAD_TIMEOUT = 600.0
+DOWNLOAD_TIMEOUT = httpx.Timeout(connect=10.0, read=60.0, write=10.0, pool=10.0)
+
+# Auto-update check interval (1 hour)
+UPDATE_CHECK_INTERVAL = 3600
+
+
+def _show_welcome() -> None:
+    """Show welcome message on first launch. Uses a marker file to show only once."""
+    marker = get_cache_dir() / ".welcome_shown"
+    if marker.exists():
+        return
+    print()
+    print("  CloakBrowser — stealth Chromium for automation")
+    print("  https://github.com/CloakHQ/CloakBrowser")
+    print()
+    print("  Issues?  https://github.com/CloakHQ/CloakBrowser/issues")
+    print("  Donate?  https://ko-fi.com/cloakhq")
+    print("  Star us if CloakBrowser helps your project!")
+    print()
+    try:
+        marker.parent.mkdir(parents=True, exist_ok=True)
+        marker.write_text("")
+    except OSError:
+        pass
 
 
 def ensure_binary() -> str:
@@ -48,20 +88,37 @@ def ensure_binary() -> str:
         logger.info("Using local binary override: %s", local_override)
         return str(path)
 
-    # Check if binary is already cached
-    binary_path = get_binary_path()
+    # Fail fast if no binary available for this platform
+    check_platform_available()
+
+    # Check for auto-updated version first, then fall back to hardcoded
+    effective = get_effective_version()
+    binary_path = get_binary_path(effective)
+
     if binary_path.exists() and _is_executable(binary_path):
-        logger.debug("Binary found in cache: %s", binary_path)
+        logger.debug("Binary found in cache: %s (version %s)", binary_path, effective)
+        _show_welcome()
+        _maybe_trigger_update_check()
         return str(binary_path)
 
-    # Download
+    # Fall back to platform's hardcoded version if effective version binary doesn't exist
+    platform_version = get_chromium_version()
+    if effective != platform_version:
+        fallback_path = get_binary_path()
+        if fallback_path.exists() and _is_executable(fallback_path):
+            logger.debug("Binary found in cache: %s", fallback_path)
+            _maybe_trigger_update_check()
+            return str(fallback_path)
+
+    # Download platform's hardcoded version
     logger.info(
         "Stealth Chromium %s not found. Downloading for %s...",
-        CHROMIUM_VERSION,
+        platform_version,
         get_platform_tag(),
     )
     _download_and_extract()
 
+    binary_path = get_binary_path()
     if not binary_path.exists():
         raise RuntimeError(
             f"Download completed but binary not found at expected path: {binary_path}. "
@@ -69,29 +126,123 @@ def ensure_binary() -> str:
             f"https://github.com/CloakHQ/cloakbrowser/issues"
         )
 
+    _maybe_trigger_update_check()
     return str(binary_path)
 
 
-def _download_and_extract() -> None:
-    """Download the binary archive and extract to cache directory."""
-    url = get_download_url()
-    binary_dir = get_binary_dir()
+def _download_and_extract(version: str | None = None) -> None:
+    """Download the binary archive and extract to cache directory.
+
+    Tries the primary server (cloakbrowser.dev) first, falls back to
+    GitHub Releases if the primary is unreachable or returns an error.
+    Verifies SHA-256 checksum before extraction when available.
+    """
+    primary_url = get_download_url(version)
+    fallback_url = get_fallback_download_url(version)
+    binary_dir = get_binary_dir(version)
+    binary_path = get_binary_path(version)
 
     # Create cache dir
     binary_dir.parent.mkdir(parents=True, exist_ok=True)
 
     # Download to temp file first (atomic — no partial downloads in cache)
-    with tempfile.NamedTemporaryFile(suffix=".tar.gz", delete=False) as tmp:
+    with tempfile.NamedTemporaryFile(suffix=get_archive_ext(), delete=False) as tmp:
         tmp_path = Path(tmp.name)
 
     try:
-        _download_file(url, tmp_path)
-        _extract_archive(tmp_path, binary_dir)
+        # Try primary, fall back to GitHub Releases (skip fallback if custom URL)
+        try:
+            _download_file(primary_url, tmp_path)
+        except Exception as primary_err:
+            if os.environ.get("CLOAKBROWSER_DOWNLOAD_URL"):
+                raise
+            logger.warning(
+                "Primary download failed (%s), trying GitHub Releases...",
+                primary_err,
+            )
+            _download_file(fallback_url, tmp_path)
+
+        # Verify checksum before extraction
+        if os.environ.get("CLOAKBROWSER_SKIP_CHECKSUM", "").lower() != "true":
+            _verify_download_checksum(tmp_path, version)
+
+        _extract_archive(tmp_path, binary_dir, binary_path)
+        _show_welcome()
     finally:
         # Clean up temp file
         tmp_path.unlink(missing_ok=True)
 
 
+def _verify_download_checksum(file_path: Path, version: str | None = None) -> None:
+    """Fetch SHA256SUMS and verify the downloaded file. Warn if unavailable, fail on mismatch."""
+    checksums = _fetch_checksums(version)
+    tarball_name = get_archive_name()
+
+    if checksums is None:
+        logger.warning("SHA256SUMS not available for this release — skipping checksum verification")
+        return
+
+    expected = checksums.get(tarball_name)
+    if expected is None:
+        logger.warning("SHA256SUMS found but no entry for %s — skipping verification", tarball_name)
+        return
+
+    _verify_checksum(file_path, expected)
+
+
+def _fetch_checksums(version: str | None = None) -> dict[str, str] | None:
+    """Fetch SHA256SUMS file for a version. Returns {filename: hash} or None."""
+    v = version or get_chromium_version()
+    has_custom_url = os.environ.get("CLOAKBROWSER_DOWNLOAD_URL")
+
+    # Build URL list — respect custom URL contract (no GitHub fallback)
+    urls = [f"{DOWNLOAD_BASE_URL}/chromium-v{v}/SHA256SUMS"]
+    if not has_custom_url:
+        urls.append(f"{GITHUB_DOWNLOAD_BASE_URL}/chromium-v{v}/SHA256SUMS")
+
+    for url in urls:
+        try:
+            resp = httpx.get(url, follow_redirects=True, timeout=10.0)
+            resp.raise_for_status()
+            return _parse_checksums(resp.text)
+        except Exception:
+            continue
+    return None
+
+
+def _parse_checksums(text: str) -> dict[str, str]:
+    """Parse SHA256SUMS format: 'hash  filename' per line."""
+    result = {}
+    for line in text.strip().splitlines():
+        line = line.strip()
+        if not line:
+            continue
+        parts = line.split(None, 1)
+        if len(parts) == 2:
+            hash_val, filename = parts
+            filename = filename.lstrip("*")
+            result[filename] = hash_val.lower()
+    return result
+
+
+def _verify_checksum(file_path: Path, expected_hash: str) -> None:
+    """Verify SHA-256 of a file. Raises RuntimeError on mismatch."""
+    sha256 = hashlib.sha256()
+    with open(file_path, "rb") as f:
+        for chunk in iter(lambda: f.read(8192), b""):
+            sha256.update(chunk)
+    actual = sha256.hexdigest().lower()
+    if actual != expected_hash:
+        raise RuntimeError(
+            f"Checksum verification failed!\n"
+            f"  Expected: {expected_hash}\n"
+            f"  Got:      {actual}\n"
+            f"  File may be corrupted or tampered with. "
+            f"Please retry or report at https://github.com/CloakHQ/cloakbrowser/issues"
+        )
+    logger.info("Checksum verified: SHA-256 OK")
+
+
 def _download_file(url: str, dest: Path) -> None:
     """Download a file with progress logging."""
     logger.info("Downloading from %s", url)
@@ -123,8 +274,10 @@ def _download_file(url: str, dest: Path) -> None:
     logger.info("Download complete: %d MB", dest.stat().st_size // (1024 * 1024))
 
 
-def _extract_archive(archive_path: Path, dest_dir: Path) -> None:
-    """Extract tar.gz archive to destination directory."""
+def _extract_archive(
+    archive_path: Path, dest_dir: Path, binary_path: Path | None = None
+) -> None:
+    """Extract tar.gz or zip archive to destination directory."""
     logger.info("Extracting to %s", dest_dir)
 
     # Clean existing dir if partial download existed
@@ -134,29 +287,59 @@ def _extract_archive(archive_path: Path, dest_dir: Path) -> None:
 
     dest_dir.mkdir(parents=True, exist_ok=True)
 
+    if str(archive_path).endswith(".zip"):
+        _extract_zip(archive_path, dest_dir)
+    else:
+        _extract_tar(archive_path, dest_dir)
+
+    # If extracted into a single subdirectory, flatten it
+    # (e.g. fingerprint-chromium-142-custom-v2/chrome → chrome)
+    # But never flatten .app bundles — macOS needs the bundle structure intact
+    _flatten_single_subdir(dest_dir)
+
+    # Make binary executable
+    bp = binary_path or get_binary_path()
+    if bp.exists():
+        _make_executable(bp)
+
+    # macOS: remove quarantine/provenance xattrs to prevent Gatekeeper prompts
+    if platform.system() == "Darwin":
+        _remove_quarantine(dest_dir)
+
+    if bp.exists():
+        logger.info("Binary ready: %s", bp)
+
+
+def _extract_tar(archive_path: Path, dest_dir: Path) -> None:
+    """Extract tar.gz archive with path traversal protection."""
     with tarfile.open(archive_path, "r:gz") as tar:
-        # Security: prevent path traversal and symlink attacks
         safe_members = []
         for member in tar.getmembers():
+            # Allow symlinks — macOS .app bundles require them (Framework layout)
             if member.issym() or member.islnk():
-                logger.warning("Skipping symlink in archive: %s", member.name)
-                continue
-            member_path = (dest_dir / member.name).resolve()
-            if not str(member_path).startswith(str(dest_dir.resolve())):
-                raise RuntimeError(f"Archive contains path traversal: {member.name}")
+                link_target = member.linkname
+                if os.path.isabs(link_target) or ".." in link_target.split("/"):
+                    logger.warning("Skipping suspicious symlink: %s -> %s", member.name, link_target)
+                    continue
+            else:
+                member_path = (dest_dir / member.name).resolve()
+                if not str(member_path).startswith(str(dest_dir.resolve())):
+                    raise RuntimeError(f"Archive contains path traversal: {member.name}")
             safe_members.append(member)
 
         tar.extractall(dest_dir, members=safe_members)
 
-    # If tar extracted into a single subdirectory, flatten it
-    # (e.g. fingerprint-chromium-142-custom-v2/chrome → chrome)
-    _flatten_single_subdir(dest_dir)
 
-    # Make binary executable
-    binary_path = get_binary_path()
-    if binary_path.exists():
-        _make_executable(binary_path)
-        logger.info("Binary ready: %s", binary_path)
+def _extract_zip(archive_path: Path, dest_dir: Path) -> None:
+    """Extract zip archive with path traversal protection."""
+    import zipfile
+
+    with zipfile.ZipFile(archive_path, "r") as zf:
+        for info in zf.infolist():
+            member_path = (dest_dir / info.filename).resolve()
+            if not str(member_path).startswith(str(dest_dir.resolve())):
+                raise RuntimeError(f"Archive contains path traversal: {info.filename}")
+        zf.extractall(dest_dir)
 
 
 def _flatten_single_subdir(dest_dir: Path) -> None:
@@ -170,6 +353,10 @@ def _flatten_single_subdir(dest_dir: Path) -> None:
     entries = list(dest_dir.iterdir())
     if len(entries) == 1 and entries[0].is_dir():
         subdir = entries[0]
+        # Never flatten .app bundles — macOS needs the bundle structure
+        if subdir.name.endswith(".app"):
+            logger.debug("Keeping .app bundle intact: %s", subdir.name)
+            return
         logger.debug("Flattening single subdirectory: %s", subdir.name)
         for item in subdir.iterdir():
             shutil.move(str(item), str(dest_dir / item.name))
@@ -182,11 +369,26 @@ def _is_executable(path: Path) -> bool:
 
 
 def _make_executable(path: Path) -> None:
-    """Make a file executable (chmod +x)."""
+    """Make a file executable (chmod +x). Skipped on Windows (no-op / AV lock risk)."""
+    if platform.system() == "Windows":
+        return
     current = path.stat().st_mode
     path.chmod(current | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
 
 
+def _remove_quarantine(path: Path) -> None:
+    """Remove macOS quarantine/provenance xattrs so Gatekeeper doesn't block the binary."""
+    try:
+        subprocess.run(
+            ["xattr", "-cr", str(path)],
+            capture_output=True,
+            timeout=30,
+        )
+        logger.debug("Removed quarantine attributes from %s", path)
+    except Exception:
+        logger.debug("Failed to remove quarantine attributes", exc_info=True)
+
+
 def clear_cache() -> None:
     """Remove all cached binaries. Forces re-download on next launch."""
     from .config import get_cache_dir
@@ -200,12 +402,177 @@ def clear_cache() -> None:
 
 def binary_info() -> dict:
     """Return info about the current binary installation."""
-    binary_path = get_binary_path()
+    effective = get_effective_version()
+    binary_path = get_binary_path(effective)
     return {
-        "version": CHROMIUM_VERSION,
+        "version": effective,
+        "bundled_version": CHROMIUM_VERSION,
         "platform": get_platform_tag(),
         "binary_path": str(binary_path),
         "installed": binary_path.exists(),
-        "cache_dir": str(get_binary_dir()),
-        "download_url": get_download_url(),
+        "cache_dir": str(get_binary_dir(effective)),
+        "download_url": get_download_url(effective),
     }
+
+
+# ---------------------------------------------------------------------------
+# Auto-update
+# ---------------------------------------------------------------------------
+
+def check_for_update() -> str | None:
+    """Manually check for a newer Chromium version. Returns new version or None.
+
+    This is the public API for triggering an update check. Unlike the
+    background check in ensure_binary(), this blocks until complete.
+    """
+    latest = _get_latest_chromium_version()
+    if latest is None:
+        return None
+    if not _version_newer(latest, get_chromium_version()):
+        return None
+
+    binary_dir = get_binary_dir(latest)
+    if binary_dir.exists():
+        # Already downloaded
+        _write_version_marker(latest)
+        return latest
+
+    logger.info("Downloading Chromium %s...", latest)
+    _download_and_extract(version=latest)
+    _write_version_marker(latest)
+    return latest
+
+
+def _should_check_for_update() -> bool:
+    """Check if auto-update is enabled and rate limit hasn't been hit."""
+    if os.environ.get("CLOAKBROWSER_AUTO_UPDATE", "").lower() == "false":
+        return False
+    if get_local_binary_override():
+        return False
+    if os.environ.get("CLOAKBROWSER_DOWNLOAD_URL"):
+        return False
+
+    check_file = get_cache_dir() / ".last_update_check"
+    if check_file.exists():
+        try:
+            last_check = float(check_file.read_text().strip())
+            if time.time() - last_check < UPDATE_CHECK_INTERVAL:
+                return False
+        except (ValueError, OSError):
+            pass
+    return True
+
+
+def _get_latest_chromium_version() -> str | None:
+    """Hit GitHub Releases API, return latest chromium-v* version for this platform.
+
+    Checks that the release has a binary asset for the current platform,
+    so Linux-only releases won't be offered to macOS users.
+    """
+    try:
+        resp = httpx.get(
+            GITHUB_API_URL, params={"per_page": 10}, timeout=10.0
+        )
+        resp.raise_for_status()
+        platform_tarball = get_archive_name()
+        for release in resp.json():
+            tag = release.get("tag_name", "")
+            if tag.startswith("chromium-v") and not release.get("draft"):
+                asset_names = {a["name"] for a in release.get("assets", [])}
+                if platform_tarball in asset_names:
+                    return tag.removeprefix("chromium-v")
+        return None
+    except Exception:
+        logger.debug("Auto-update check failed", exc_info=True)
+        return None
+
+
+def _write_version_marker(version: str) -> None:
+    """Write the latest version marker for this platform to cache dir."""
+    cache_dir = get_cache_dir()
+    cache_dir.mkdir(parents=True, exist_ok=True)
+    marker = cache_dir / f"latest_version_{get_platform_tag()}"
+    # Write to temp file then rename for atomicity
+    tmp = marker.with_suffix(".tmp")
+    tmp.write_text(version)
+    tmp.rename(marker)
+
+
+_wrapper_update_checked = False
+
+
+def _check_wrapper_update() -> None:
+    """Check PyPI for a newer wrapper version. Runs once per process."""
+    global _wrapper_update_checked
+    if _wrapper_update_checked:
+        return
+    _wrapper_update_checked = True
+    if os.environ.get("CLOAKBROWSER_AUTO_UPDATE", "").lower() == "false":
+        return
+    if os.environ.get("CLOAKBROWSER_DOWNLOAD_URL"):
+        return
+    try:
+        resp = httpx.get(
+            "https://pypi.org/pypi/cloakbrowser/json",
+            timeout=5.0,
+        )
+        resp.raise_for_status()
+        latest = resp.json()["info"]["version"]
+        if _version_newer(latest, _wrapper_version):
+            logger.warning(
+                "Update available: cloakbrowser %s → %s. "
+                "Run: pip install --upgrade cloakbrowser",
+                _wrapper_version,
+                latest,
+            )
+    except Exception:
+        logger.debug("Wrapper update check failed", exc_info=True)
+
+
+def _check_and_download_update() -> None:
+    """Background task: check for newer binary, download if available."""
+    try:
+        # Record check timestamp first (rate limiting)
+        check_file = get_cache_dir() / ".last_update_check"
+        check_file.parent.mkdir(parents=True, exist_ok=True)
+        check_file.write_text(str(time.time()))
+
+        platform_version = get_chromium_version()
+        latest = _get_latest_chromium_version()
+        if latest is None:
+            return
+        if not _version_newer(latest, platform_version):
+            return
+
+        # Already downloaded?
+        if get_binary_dir(latest).exists():
+            _write_version_marker(latest)
+            return
+
+        logger.info(
+            "Newer Chromium available: %s (current: %s). Downloading in background...",
+            latest,
+            platform_version,
+        )
+        _download_and_extract(version=latest)
+        _write_version_marker(latest)
+        logger.info(
+            "Background update complete: Chromium %s ready. Will use on next launch.",
+            latest,
+        )
+    except Exception:
+        logger.debug("Background update failed", exc_info=True)
+
+
+def _maybe_trigger_update_check() -> None:
+    """Fire-and-forget update check in a daemon thread."""
+    # Wrapper update: once per process, not rate-limited
+    if not _wrapper_update_checked:
+        t = threading.Thread(target=_check_wrapper_update, daemon=True)
+        t.start()
+
+    # Binary update: rate-limited to once per hour
+    if not _should_check_for_update():
+        return
+    t = threading.Thread(target=_check_and_download_update, daemon=True)
+    t.start()

cloakbrowser/geoip.py

@@ -0,0 +1,238 @@
+"""GeoIP-based timezone and locale detection from proxy IP.
+
+Optional feature — requires ``geoip2`` package::
+
+    pip install cloakbrowser[geoip]
+
+Downloads GeoLite2-City.mmdb (~70 MB) on first use, caches in
+``~/.cloakbrowser/geoip/``.  Background re-download after 30 days.
+"""
+
+from __future__ import annotations
+
+import ipaddress
+import logging
+import socket
+import tempfile
+import threading
+import time
+from pathlib import Path
+from urllib.parse import urlparse
+
+logger = logging.getLogger("cloakbrowser")
+
+# P3TERX mirror of MaxMind GeoLite2-City — no license key needed
+GEOIP_DB_URL = (
+    "https://github.com/P3TERX/GeoLite.mmdb/raw/download/GeoLite2-City.mmdb"
+)
+GEOIP_DB_FILENAME = "GeoLite2-City.mmdb"
+GEOIP_UPDATE_INTERVAL = 30 * 86_400  # 30 days
+
+# Country ISO code → BCP 47 locale (covers ~90 % of proxy traffic)
+COUNTRY_LOCALE_MAP: dict[str, str] = {
+    "US": "en-US", "GB": "en-GB", "AU": "en-AU", "CA": "en-CA", "NZ": "en-NZ",
+    "IE": "en-IE", "ZA": "en-ZA", "SG": "en-SG",
+    "DE": "de-DE", "AT": "de-AT", "CH": "de-CH",
+    "FR": "fr-FR", "BE": "fr-BE",
+    "ES": "es-ES", "MX": "es-MX", "AR": "es-AR", "CO": "es-CO", "CL": "es-CL",
+    "BR": "pt-BR", "PT": "pt-PT",
+    "IT": "it-IT", "NL": "nl-NL",
+    "JP": "ja-JP", "KR": "ko-KR", "CN": "zh-CN", "TW": "zh-TW", "HK": "zh-HK",
+    "RU": "ru-RU", "UA": "uk-UA", "PL": "pl-PL", "CZ": "cs-CZ", "RO": "ro-RO",
+    "IL": "he-IL", "TR": "tr-TR", "SA": "ar-SA", "AE": "ar-AE", "EG": "ar-EG",
+    "IN": "hi-IN", "ID": "id-ID", "PH": "en-PH",
+    "TH": "th-TH", "VN": "vi-VN", "MY": "ms-MY",
+    "SE": "sv-SE", "NO": "nb-NO", "DK": "da-DK", "FI": "fi-FI",
+    "GR": "el-GR", "HU": "hu-HU", "BG": "bg-BG",
+}
+
+
+def resolve_proxy_geo(proxy_url: str) -> tuple[str | None, str | None]:
+    """Resolve timezone and locale from a proxy's IP address.
+
+    Returns ``(timezone, locale)`` — either or both may be ``None`` on
+    failure (missing dep, DB download error, lookup miss).  Never raises.
+    """
+    try:
+        import geoip2.database  # noqa: F811
+    except ImportError:
+        raise ImportError(
+            "geoip2 is required for geoip=True. Install it with:\n"
+            "  pip install cloakbrowser[geoip]"
+        ) from None
+
+    db_path = _ensure_geoip_db()
+    if db_path is None:
+        return None, None
+
+    # Exit IP (through proxy) is most accurate — gateway DNS may differ from exit
+    ip = _resolve_exit_ip(proxy_url)
+    if ip is None:
+        ip = _resolve_proxy_ip(proxy_url)
+    if ip is None:
+        return None, None
+
+    try:
+        with geoip2.database.Reader(str(db_path)) as reader:
+            resp = reader.city(ip)
+            timezone = resp.location.time_zone
+            country = resp.country.iso_code
+            locale = COUNTRY_LOCALE_MAP.get(country) if country else None
+            logger.debug(
+                "GeoIP: %s → tz=%s, country=%s, locale=%s",
+                ip, timezone, country, locale,
+            )
+            return timezone, locale
+    except Exception as exc:
+        logger.debug("GeoIP lookup failed for %s: %s", ip, exc)
+        return None, None
+
+
+# ---------------------------------------------------------------------------
+# Proxy IP resolution
+# ---------------------------------------------------------------------------
+
+
+def _resolve_proxy_ip(proxy_url: str) -> str | None:
+    """Extract proxy hostname from URL and resolve to an IP address."""
+    try:
+        hostname = urlparse(proxy_url).hostname
+        if not hostname:
+            return None
+
+        # Already a literal IP?
+        try:
+            socket.inet_pton(socket.AF_INET, hostname)
+            return hostname
+        except OSError:
+            pass
+        try:
+            socket.inet_pton(socket.AF_INET6, hostname)
+            return hostname
+        except OSError:
+            pass
+
+        # DNS resolve (returns first result, handles both v4/v6)
+        results = socket.getaddrinfo(hostname, None, socket.AF_UNSPEC, socket.SOCK_STREAM)
+        if results:
+            ip = results[0][4][0]
+            logger.debug("Resolved proxy %s → %s", hostname, ip)
+            return ip
+        return None
+    except Exception as exc:
+        logger.debug("Failed to resolve proxy hostname: %s", exc)
+        return None
+
+
+def _is_private_ip(ip: str) -> bool:
+    """Check if an IP address is private/internal (not routable on the internet)."""
+    try:
+        return ipaddress.ip_address(ip).is_private
+    except ValueError:
+        return False
+
+
+# IP echo services — fast, no auth, return just the IP
+_IP_ECHO_URLS = [
+    "https://api.ipify.org",
+    "https://checkip.amazonaws.com",
+    "https://ifconfig.me/ip",
+]
+
+
+def _resolve_exit_ip(proxy_url: str) -> str | None:
+    """Discover the proxy's actual exit IP by connecting through it."""
+    import httpx
+
+    for url in _IP_ECHO_URLS:
+        try:
+            resp = httpx.get(url, proxy=proxy_url, timeout=10.0)
+            resp.raise_for_status()
+            ip = resp.text.strip()
+            # Validate it looks like an IP
+            ipaddress.ip_address(ip)
+            logger.debug("Exit IP via %s: %s", url, ip)
+            return ip
+        except Exception:
+            continue
+    logger.debug("Failed to discover exit IP through proxy")
+    return None
+
+
+# ---------------------------------------------------------------------------
+# GeoIP database management
+# ---------------------------------------------------------------------------
+
+
+def _get_geoip_dir() -> Path:
+    from .config import get_cache_dir
+
+    return get_cache_dir() / "geoip"
+
+
+def _ensure_geoip_db() -> Path | None:
+    """Return path to GeoLite2-City.mmdb, downloading on first use."""
+    db_path = _get_geoip_dir() / GEOIP_DB_FILENAME
+
+    if db_path.exists():
+        _maybe_trigger_update(db_path)
+        return db_path
+
+    try:
+        _download_geoip_db(db_path)
+        return db_path
+    except Exception as exc:
+        logger.warning("Failed to download GeoIP database: %s", exc)
+        return None
+
+
+def _download_geoip_db(dest: Path) -> None:
+    """Atomic download of GeoLite2-City.mmdb via httpx."""
+    import httpx
+
+    dest.parent.mkdir(parents=True, exist_ok=True)
+    logger.info("Downloading GeoIP database (~70 MB) …")
+
+    tmp_fd, tmp_name = tempfile.mkstemp(dir=dest.parent, suffix=".tmp")
+    tmp_path = Path(tmp_name)
+    try:
+        with httpx.stream(
+            "GET", GEOIP_DB_URL, follow_redirects=True, timeout=300.0
+        ) as resp:
+            resp.raise_for_status()
+            total = int(resp.headers.get("content-length", 0))
+            downloaded = 0
+            last_pct = -1
+            with open(tmp_fd, "wb") as f:
+                for chunk in resp.iter_bytes(chunk_size=65_536):
+                    f.write(chunk)
+                    downloaded += len(chunk)
+                    if total:
+                        pct = downloaded * 100 // total
+                        if pct >= last_pct + 10:
+                            last_pct = pct
+                            logger.info("GeoIP download: %d %%", pct)
+
+        tmp_path.rename(dest)
+        logger.info("GeoIP database ready: %s", dest)
+    except Exception:
+        tmp_path.unlink(missing_ok=True)
+        raise
+
+
+def _maybe_trigger_update(db_path: Path) -> None:
+    """Re-download in background if DB is older than 30 days."""
+    try:
+        age = time.time() - db_path.stat().st_mtime
+        if age < GEOIP_UPDATE_INTERVAL:
+            return
+    except OSError:
+        return
+
+    def _bg() -> None:
+        try:
+            _download_geoip_db(db_path)
+        except Exception:
+            logger.debug("Background GeoIP update failed", exc_info=True)
+
+    threading.Thread(target=_bg, daemon=True).start()

cloakbrowser/human/config.py

@@ -0,0 +1,194 @@
+"""cloakbrowser-human — Configuration and presets.
+
+All numeric parameters for human-like behavior are centralized here.
+Two built-in presets: 'default' (normal human speed) and 'careful' (slower, more cautious).
+"""
+
+from __future__ import annotations
+
+import math
+import random
+import time
+from dataclasses import dataclass, field
+from typing import Literal, Tuple
+
+# ---------------------------------------------------------------------------
+# Type alias
+# ---------------------------------------------------------------------------
+
+Range = Tuple[float, float]
+HumanPreset = Literal["default", "careful"]
+
+
+# ---------------------------------------------------------------------------
+# Configuration dataclass
+# ---------------------------------------------------------------------------
+
+@dataclass
+class HumanConfig:
+    """All tunable parameters for human-like behavior."""
+
+    # Keyboard
+    typing_delay: float = 70
+    typing_delay_spread: float = 40
+    typing_pause_chance: float = 0.1
+    typing_pause_range: Range = (400, 1000)
+    shift_down_delay: Range = (30, 70)
+    shift_up_delay: Range = (20, 50)
+    key_hold: Range = (15, 35)
+    
+    # Mistype (typo simulation)
+    mistype_chance: float = 0.02
+    mistype_delay_notice: Range = (100, 300)
+    mistype_delay_correct: Range = (50, 150)
+
+    field_switch_delay: Range = (800, 1500)
+
+    # Mouse — movement
+    mouse_steps_divisor: float = 8
+    mouse_min_steps: int = 25
+    mouse_max_steps: int = 80
+    mouse_wobble_max: float = 1.5
+    mouse_overshoot_chance: float = 0.15
+    mouse_overshoot_px: Range = (3, 6)
+    mouse_burst_size: Range = (3, 5)
+    mouse_burst_pause: Range = (8, 18)
+
+    # Mouse — clicks
+    click_aim_delay_input: Range = (60, 140)
+    click_aim_delay_button: Range = (80, 200)
+    click_hold_input: Range = (40, 100)
+    click_hold_button: Range = (60, 150)
+    click_input_x_range: Range = (0.05, 0.30)
+
+    # Mouse — idle
+    idle_drift_px: float = 3
+    idle_pause_range: Range = (300, 1000)
+
+    # Scroll
+    scroll_delta_base: Range = (80, 130)
+    scroll_delta_variance: float = 0.2
+    scroll_pause_fast: Range = (30, 80)
+    scroll_pause_slow: Range = (80, 200)
+    scroll_accel_steps: Range = (2, 3)
+    scroll_decel_steps: Range = (2, 3)
+    scroll_overshoot_chance: float = 0.1
+    scroll_overshoot_px: Range = (50, 150)
+    scroll_settle_delay: Range = (300, 600)
+    scroll_target_zone: Range = (0.20, 0.80)
+    scroll_pre_move_delay: Range = (100, 300)
+
+    # Initial cursor position (as if coming from the address bar area)
+    initial_cursor_x: Range = (400, 700)
+    initial_cursor_y: Range = (45, 60)
+
+    # Idle micro-movements between actions (opt-in, adds latency)
+    idle_between_actions: bool = False
+    idle_between_duration: Range = (0.3, 0.8)
+
+
+# ---------------------------------------------------------------------------
+# Presets
+# ---------------------------------------------------------------------------
+
+def _careful_config() -> HumanConfig:
+    """Careful preset — everything slower and more deliberate."""
+    return HumanConfig(
+        # Keyboard — slower typing
+        typing_delay=100,
+        typing_delay_spread=50,
+        typing_pause_chance=0.15,
+        typing_pause_range=(500, 1200),
+        shift_down_delay=(40, 90),
+        shift_up_delay=(30, 70),
+        key_hold=(20, 45),
+        field_switch_delay=(1000, 2000),
+        # Mouse — slower, more precise
+        mouse_overshoot_chance=0.10,
+        mouse_burst_pause=(12, 25),
+        # Mouse — clicks (longer aiming and holding)
+        click_aim_delay_input=(80, 180),
+        click_aim_delay_button=(120, 280),
+        click_hold_input=(60, 140),
+        click_hold_button=(80, 200),
+        # Scroll — slower
+        scroll_pause_fast=(100, 200),
+        scroll_pause_slow=(250, 600),
+        scroll_settle_delay=(400, 800),
+        scroll_pre_move_delay=(150, 400),
+        # Idle between actions enabled for careful preset
+        idle_between_actions=True,
+        idle_between_duration=(0.4, 1.0),
+    )
+
+
+_PRESETS: dict[str, HumanConfig] = {
+    "default": HumanConfig(),
+    "careful": _careful_config(),
+}
+
+
+def resolve_config(
+    preset: HumanPreset = "default",
+    overrides: dict | None = None,
+) -> HumanConfig:
+    """Resolve a preset name + optional overrides into a full HumanConfig.
+
+    Args:
+        preset: 'default' or 'careful'.
+        overrides: Dict of field names to override values.
+
+    Returns:
+        A new HumanConfig instance.
+
+    Raises:
+        ValueError: If preset is not a recognized name.
+    """
+    if preset not in _PRESETS:
+        raise ValueError(
+            f"Unknown humanize preset {preset!r}. "
+            f"Valid presets: {', '.join(sorted(_PRESETS.keys()))}"
+        )
+    base = _PRESETS[preset]
+    if not overrides:
+        return HumanConfig(**{k: getattr(base, k) for k in base.__dataclass_fields__})
+    merged = {k: getattr(base, k) for k in base.__dataclass_fields__}
+    merged.update(overrides)
+    return HumanConfig(**merged)
+
+
+# ---------------------------------------------------------------------------
+# Utility functions
+# ---------------------------------------------------------------------------
+
+def rand(lo: float, hi: float) -> float:
+    """Random float in [lo, hi]."""
+    return random.uniform(lo, hi)
+
+
+def rand_int(lo: int, hi: int) -> int:
+    """Random integer in [lo, hi] inclusive."""
+    return random.randint(lo, hi)
+
+
+def rand_range(r: Range) -> float:
+    """Random float from a (min, max) tuple."""
+    return random.uniform(r[0], r[1])
+
+
+def rand_int_range(r: Range) -> int:
+    """Random integer from a (min, max) tuple, inclusive."""
+    return random.randint(int(r[0]), int(r[1]))
+
+
+def sleep_ms(ms: float) -> None:
+    """Sleep for `ms` milliseconds."""
+    if ms > 0:
+        time.sleep(ms / 1000.0)
+
+
+async def async_sleep_ms(ms: float) -> None:
+    """Async sleep for `ms` milliseconds."""
+    if ms > 0:
+        import asyncio
+        await asyncio.sleep(ms / 1000.0)

cloakbrowser/human/keyboard.py

@@ -0,0 +1,112 @@
+"""cloakbrowser-human — Human-like keyboard input."""
+
+from __future__ import annotations
+
+import random
+from typing import Any, Protocol
+
+from .config import HumanConfig, rand, rand_range, sleep_ms
+
+
+class RawKeyboard(Protocol):
+    def down(self, key: str) -> None: ...
+    def up(self, key: str) -> None: ...
+    def type(self, text: str) -> None: ...
+    def insert_text(self, text: str) -> None: ...
+
+
+SHIFT_SYMBOLS = frozenset('@#!$%^&*()_+{}|:"<>?~')
+
+NEARBY_KEYS = {
+    'a': 'sqwz', 'b': 'vghn', 'c': 'xdfv', 'd': 'sfecx', 'e': 'wrsdf',
+    'f': 'dgrtcv', 'g': 'fhtyb', 'h': 'gjybn', 'i': 'ujko', 'j': 'hkunm',
+    'k': 'jloi', 'l': 'kop', 'm': 'njk', 'n': 'bhjm', 'o': 'iklp',
+    'p': 'ol', 'q': 'wa', 'r': 'edft', 's': 'awedxz', 't': 'rfgy',
+    'u': 'yhji', 'v': 'cfgb', 'w': 'qase', 'x': 'zsdc', 'y': 'tghu',
+    'z': 'asx',
+    '1': '2q', '2': '13qw', '3': '24we', '4': '35er', '5': '46rt',
+    '6': '57ty', '7': '68yu', '8': '79ui', '9': '80io', '0': '9p',
+}
+
+
+def _get_nearby_key(ch: str) -> str:
+    """Return a random adjacent key for the given character."""
+    lower = ch.lower()
+    if lower in NEARBY_KEYS:
+        neighbors = NEARBY_KEYS[lower]
+        wrong = random.choice(neighbors)
+        return wrong.upper() if ch.isupper() else wrong
+    return ch
+
+
+def human_type(page: Any, raw: RawKeyboard, text: str, cfg: HumanConfig) -> None:
+    for i, ch in enumerate(text):
+        # Non-ASCII characters (Cyrillic, CJK, emoji) — use insertText
+        if not ch.isascii():
+            sleep_ms(rand_range(cfg.key_hold))
+            raw.insert_text(ch)
+            if i < len(text) - 1:
+                _inter_char_delay(cfg)
+            continue
+
+        # Mistype chance — only for ASCII alphanumeric
+        if random.random() < cfg.mistype_chance and ch.isalnum():
+            wrong = _get_nearby_key(ch)
+            _type_normal_char(raw, wrong, cfg)
+            sleep_ms(rand_range(cfg.mistype_delay_notice))
+            raw.down("Backspace")
+            sleep_ms(rand_range(cfg.key_hold))
+            raw.up("Backspace")
+            sleep_ms(rand_range(cfg.mistype_delay_correct))
+
+        if ch.isupper() and ch.isalpha():
+            _type_shifted_char(page, raw, ch, cfg)
+        elif ch in SHIFT_SYMBOLS:
+            _type_shift_symbol(page, raw, ch, cfg)
+        else:
+            _type_normal_char(raw, ch, cfg)
+
+        if i < len(text) - 1:
+            _inter_char_delay(cfg)
+
+
+def _type_normal_char(raw: RawKeyboard, ch: str, cfg: HumanConfig) -> None:
+    raw.down(ch)
+    sleep_ms(rand_range(cfg.key_hold))
+    raw.up(ch)
+
+
+def _type_shifted_char(page: Any, raw: RawKeyboard, ch: str, cfg: HumanConfig) -> None:
+    raw.down("Shift")
+    sleep_ms(rand_range(cfg.shift_down_delay))
+    raw.down(ch)
+    sleep_ms(rand_range(cfg.key_hold))
+    raw.up(ch)
+    sleep_ms(rand_range(cfg.shift_up_delay))
+    raw.up("Shift")
+
+
+def _type_shift_symbol(page: Any, raw: RawKeyboard, ch: str, cfg: HumanConfig) -> None:
+    raw.down("Shift")
+    sleep_ms(rand_range(cfg.shift_down_delay))
+    raw.insert_text(ch)
+    page.evaluate(
+        """(key) => {
+            const el = document.activeElement;
+            if (el) {
+                el.dispatchEvent(new KeyboardEvent('keydown', { key, bubbles: true }));
+                el.dispatchEvent(new KeyboardEvent('keyup', { key, bubbles: true }));
+            }
+        }""",
+        ch,
+    )
+    sleep_ms(rand_range(cfg.shift_up_delay))
+    raw.up("Shift")
+
+
+def _inter_char_delay(cfg: HumanConfig) -> None:
+    if random.random() < cfg.typing_pause_chance:
+        sleep_ms(rand_range(cfg.typing_pause_range))
+    else:
+        delay = cfg.typing_delay + (random.random() - 0.5) * 2 * cfg.typing_delay_spread
+        sleep_ms(max(10, delay))

cloakbrowser/human/keyboard_async.py

@@ -0,0 +1,93 @@
+"""cloakbrowser-human — Async human-like keyboard input.
+
+Mirrors keyboard.py but uses ``await`` for all Playwright calls and
+``async_sleep_ms`` instead of ``sleep_ms``.
+"""
+
+from __future__ import annotations
+
+import random
+from typing import Any, Protocol
+
+from .config import HumanConfig, rand, rand_range, async_sleep_ms
+from .keyboard import SHIFT_SYMBOLS, NEARBY_KEYS, _get_nearby_key
+
+
+class AsyncRawKeyboard(Protocol):
+    async def down(self, key: str) -> None: ...
+    async def up(self, key: str) -> None: ...
+    async def type(self, text: str) -> None: ...
+    async def insert_text(self, text: str) -> None: ...
+
+
+async def async_human_type(page: Any, raw: AsyncRawKeyboard, text: str, cfg: HumanConfig) -> None:
+    for i, ch in enumerate(text):
+        # Non-ASCII characters (Cyrillic, CJK, emoji) — use insertText
+        if not ch.isascii():
+            await async_sleep_ms(rand_range(cfg.key_hold))
+            await raw.insert_text(ch)
+            if i < len(text) - 1:
+                await _inter_char_delay(cfg)
+            continue
+
+        # Mistype chance — only for ASCII alphanumeric
+        if random.random() < cfg.mistype_chance and ch.isalnum():
+            wrong = _get_nearby_key(ch)
+            await _type_normal_char(raw, wrong, cfg)
+            await async_sleep_ms(rand_range(cfg.mistype_delay_notice))
+            await raw.down("Backspace")
+            await async_sleep_ms(rand_range(cfg.key_hold))
+            await raw.up("Backspace")
+            await async_sleep_ms(rand_range(cfg.mistype_delay_correct))
+
+        if ch.isupper() and ch.isalpha():
+            await _type_shifted_char(page, raw, ch, cfg)
+        elif ch in SHIFT_SYMBOLS:
+            await _type_shift_symbol(page, raw, ch, cfg)
+        else:
+            await _type_normal_char(raw, ch, cfg)
+
+        if i < len(text) - 1:
+            await _inter_char_delay(cfg)
+
+
+async def _type_normal_char(raw: AsyncRawKeyboard, ch: str, cfg: HumanConfig) -> None:
+    await raw.down(ch)
+    await async_sleep_ms(rand_range(cfg.key_hold))
+    await raw.up(ch)
+
+
+async def _type_shifted_char(page: Any, raw: AsyncRawKeyboard, ch: str, cfg: HumanConfig) -> None:
+    await raw.down("Shift")
+    await async_sleep_ms(rand_range(cfg.shift_down_delay))
+    await raw.down(ch)
+    await async_sleep_ms(rand_range(cfg.key_hold))
+    await raw.up(ch)
+    await async_sleep_ms(rand_range(cfg.shift_up_delay))
+    await raw.up("Shift")
+
+
+async def _type_shift_symbol(page: Any, raw: AsyncRawKeyboard, ch: str, cfg: HumanConfig) -> None:
+    await raw.down("Shift")
+    await async_sleep_ms(rand_range(cfg.shift_down_delay))
+    await raw.insert_text(ch)
+    await page.evaluate(
+        """(key) => {
+            const el = document.activeElement;
+            if (el) {
+                el.dispatchEvent(new KeyboardEvent('keydown', { key, bubbles: true }));
+                el.dispatchEvent(new KeyboardEvent('keyup', { key, bubbles: true }));
+            }
+        }""",
+        ch,
+    )
+    await async_sleep_ms(rand_range(cfg.shift_up_delay))
+    await raw.up("Shift")
+
+
+async def _inter_char_delay(cfg: HumanConfig) -> None:
+    if random.random() < cfg.typing_pause_chance:
+        await async_sleep_ms(rand_range(cfg.typing_pause_range))
+    else:
+        delay = cfg.typing_delay + (random.random() - 0.5) * 2 * cfg.typing_delay_spread
+        await async_sleep_ms(max(10, delay))

cloakbrowser/human/mouse.py

@@ -0,0 +1,132 @@
+"""cloakbrowser-human — Human-like mouse movement and clicking."""
+
+from __future__ import annotations
+
+import math
+import random
+from typing import Any, Protocol, Tuple
+
+from .config import HumanConfig, rand, rand_range, rand_int_range, sleep_ms
+
+
+class RawMouse(Protocol):
+    def move(self, x: float, y: float) -> None: ...
+    def down(self) -> None: ...
+    def up(self) -> None: ...
+    def wheel(self, delta_x: float, delta_y: float) -> None: ...
+
+
+class Point:
+    __slots__ = ("x", "y")
+    def __init__(self, x: float, y: float):
+        self.x = x
+        self.y = y
+
+
+def _ease_in_out(t: float) -> float:
+    if t < 0.5:
+        return 4 * t * t * t
+    return 1 - pow(-2 * t + 2, 3) / 2
+
+
+def _bezier(p0: Point, p1: Point, p2: Point, p3: Point, t: float) -> Point:
+    u = 1 - t
+    uu = u * u
+    uuu = uu * u
+    tt = t * t
+    ttt = tt * t
+    return Point(
+        uuu * p0.x + 3 * uu * t * p1.x + 3 * u * tt * p2.x + ttt * p3.x,
+        uuu * p0.y + 3 * uu * t * p1.y + 3 * u * tt * p2.y + ttt * p3.y,
+    )
+
+
+def _random_control_points(start: Point, end: Point) -> Tuple[Point, Point]:
+    dx = end.x - start.x
+    dy = end.y - start.y
+    dist = math.hypot(dx, dy) or 1
+    px = -dy / dist
+    py = dx / dist
+    bias1 = rand(-0.3, 0.3) * dist
+    bias2 = rand(-0.3, 0.3) * dist
+    return (
+        Point(start.x + dx * 0.25 + px * bias1, start.y + dy * 0.25 + py * bias1),
+        Point(start.x + dx * 0.75 + px * bias2, start.y + dy * 0.75 + py * bias2),
+    )
+
+
+def human_move(
+    raw: RawMouse,
+    start_x: float, start_y: float,
+    end_x: float, end_y: float,
+    cfg: HumanConfig,
+) -> None:
+    dist = math.hypot(end_x - start_x, end_y - start_y)
+    if dist < 1:
+        return
+
+    steps = max(cfg.mouse_min_steps, min(cfg.mouse_max_steps, round(dist / cfg.mouse_steps_divisor)))
+    start = Point(start_x, start_y)
+    end = Point(end_x, end_y)
+    cp1, cp2 = _random_control_points(start, end)
+
+    burst_counter = 0
+    burst_size = rand_int_range(cfg.mouse_burst_size)
+
+    for i in range(steps + 1):
+        progress = i / steps
+        eased_t = _ease_in_out(progress)
+        pt = _bezier(start, cp1, cp2, end, eased_t)
+
+        wobble_amp = math.sin(math.pi * progress) * cfg.mouse_wobble_max
+        wx = pt.x + (random.random() - 0.5) * 2 * wobble_amp
+        wy = pt.y + (random.random() - 0.5) * 2 * wobble_amp
+
+        raw.move(round(wx), round(wy))
+
+        burst_counter += 1
+        if burst_counter >= burst_size and i < steps:
+            sleep_ms(rand_range(cfg.mouse_burst_pause))
+            burst_counter = 0
+
+    if random.random() < cfg.mouse_overshoot_chance:
+        overshoot_dist = rand_range(cfg.mouse_overshoot_px)
+        angle = math.atan2(end_y - start_y, end_x - start_x)
+        raw.move(round(end_x + math.cos(angle) * overshoot_dist),
+                 round(end_y + math.sin(angle) * overshoot_dist))
+        sleep_ms(rand(30, 70))
+        raw.move(round(end_x + (random.random() - 0.5) * 4),
+                 round(end_y + (random.random() - 0.5) * 4))
+
+
+def click_target(box: dict, is_input: bool, cfg: HumanConfig) -> Point:
+    if is_input:
+        x_frac = rand_range(cfg.click_input_x_range)
+        y_frac = rand(0.30, 0.70)
+    else:
+        x_frac = rand(0.35, 0.65)
+        y_frac = rand(0.35, 0.65)
+    return Point(round(box["x"] + box["width"] * x_frac),
+                 round(box["y"] + box["height"] * y_frac))
+
+
+def human_click(raw: RawMouse, is_input: bool, cfg: HumanConfig) -> None:
+    aim_delay = rand_range(cfg.click_aim_delay_input) if is_input else rand_range(cfg.click_aim_delay_button)
+    sleep_ms(aim_delay)
+    hold_time = rand_range(cfg.click_hold_input) if is_input else rand_range(cfg.click_hold_button)
+    raw.down()
+    sleep_ms(hold_time)
+    raw.up()
+
+
+def human_idle(raw: RawMouse, seconds: float, cx: float, cy: float, cfg: HumanConfig) -> None:
+    import time as _time
+    end_time = _time.monotonic() + seconds
+    x, y = cx, cy
+    while _time.monotonic() < end_time:
+        dx = (random.random() - 0.5) * 2 * cfg.idle_drift_px
+        dy = (random.random() - 0.5) * 2 * cfg.idle_drift_px
+        x += dx
+        y += dy
+        raw.move(round(x), round(y))
+        sleep_ms(rand_range(cfg.idle_pause_range))

cloakbrowser/human/mouse_async.py

@@ -0,0 +1,87 @@
+"""cloakbrowser-human — Async human-like mouse movement and clicking.
+
+Mirrors mouse.py but uses ``await`` for all Playwright calls and
+``async_sleep_ms`` instead of ``sleep_ms``.
+"""
+
+from __future__ import annotations
+
+import math
+import random
+from typing import Any, Protocol
+
+from .config import HumanConfig, rand, rand_range, rand_int_range, async_sleep_ms
+from .mouse import Point, _ease_in_out, _bezier, _random_control_points, click_target  # noqa: reuse pure math
+
+
+class AsyncRawMouse(Protocol):
+    async def move(self, x: float, y: float) -> None: ...
+    async def down(self) -> None: ...
+    async def up(self) -> None: ...
+    async def wheel(self, delta_x: float, delta_y: float) -> None: ...
+
+
+async def async_human_move(
+    raw: AsyncRawMouse,
+    start_x: float, start_y: float,
+    end_x: float, end_y: float,
+    cfg: HumanConfig,
+) -> None:
+    dist = math.hypot(end_x - start_x, end_y - start_y)
+    if dist < 1:
+        return
+
+    steps = max(cfg.mouse_min_steps, min(cfg.mouse_max_steps, round(dist / cfg.mouse_steps_divisor)))
+    start = Point(start_x, start_y)
+    end = Point(end_x, end_y)
+    cp1, cp2 = _random_control_points(start, end)
+
+    burst_counter = 0
+    burst_size = rand_int_range(cfg.mouse_burst_size)
+
+    for i in range(steps + 1):
+        progress = i / steps
+        eased_t = _ease_in_out(progress)
+        pt = _bezier(start, cp1, cp2, end, eased_t)
+
+        wobble_amp = math.sin(math.pi * progress) * cfg.mouse_wobble_max
+        wx = pt.x + (random.random() - 0.5) * 2 * wobble_amp
+        wy = pt.y + (random.random() - 0.5) * 2 * wobble_amp
+
+        await raw.move(round(wx), round(wy))
+
+        burst_counter += 1
+        if burst_counter >= burst_size and i < steps:
+            await async_sleep_ms(rand_range(cfg.mouse_burst_pause))
+            burst_counter = 0
+
+    if random.random() < cfg.mouse_overshoot_chance:
+        overshoot_dist = rand_range(cfg.mouse_overshoot_px)
+        angle = math.atan2(end_y - start_y, end_x - start_x)
+        await raw.move(round(end_x + math.cos(angle) * overshoot_dist),
+                       round(end_y + math.sin(angle) * overshoot_dist))
+        await async_sleep_ms(rand(30, 70))
+        await raw.move(round(end_x + (random.random() - 0.5) * 4),
+                       round(end_y + (random.random() - 0.5) * 4))
+
+
+async def async_human_click(raw: AsyncRawMouse, is_input: bool, cfg: HumanConfig) -> None:
+    aim_delay = rand_range(cfg.click_aim_delay_input) if is_input else rand_range(cfg.click_aim_delay_button)
+    await async_sleep_ms(aim_delay)
+    hold_time = rand_range(cfg.click_hold_input) if is_input else rand_range(cfg.click_hold_button)
+    await raw.down()
+    await async_sleep_ms(hold_time)
+    await raw.up()
+
+
+async def async_human_idle(raw: AsyncRawMouse, seconds: float, cx: float, cy: float, cfg: HumanConfig) -> None:
+    import time as _time
+    end_time = _time.monotonic() + seconds
+    x, y = cx, cy
+    while _time.monotonic() < end_time:
+        dx = (random.random() - 0.5) * 2 * cfg.idle_drift_px
+        dy = (random.random() - 0.5) * 2 * cfg.idle_drift_px
+        x += dx
+        y += dy
+        await raw.move(round(x), round(y))
+        await async_sleep_ms(rand_range(cfg.idle_pause_range))

cloakbrowser/human/scroll.py

@@ -0,0 +1,132 @@
+"""cloakbrowser-human — Human-like scrolling via mouse wheel events."""
+
+from __future__ import annotations
+
+import math
+import random
+from typing import Any, Optional, Tuple
+
+from .config import HumanConfig, rand, rand_range, rand_int_range, sleep_ms
+from .mouse import RawMouse, human_move
+
+
+def _is_in_viewport(bounds: dict, viewport_height: int, cfg: HumanConfig) -> bool:
+    top_edge = bounds["y"]
+    bottom_edge = bounds["y"] + bounds["height"]
+    zone_top = viewport_height * cfg.scroll_target_zone[0]
+    zone_bottom = viewport_height * cfg.scroll_target_zone[1]
+    return top_edge >= zone_top and bottom_edge <= zone_bottom
+
+
+def _get_element_box(page: Any, selector: str) -> Optional[dict]:
+    try:
+        el = page.locator(selector).first
+        return el.bounding_box(timeout=2000)
+    except Exception:
+        return None
+
+
+def _smooth_wheel(raw: RawMouse, delta: int, cfg: HumanConfig) -> None:
+    """Send one logical scroll as a burst of small wheel events (like real inertia)."""
+    abs_d = abs(delta)
+    sign = 1 if delta > 0 else -1
+    sent = 0
+    while sent < abs_d:
+        step_size = rand(20, 40)
+        chunk = min(step_size, abs_d - sent)
+        raw.wheel(0, round(chunk) * sign)
+        sent += chunk
+        sleep_ms(rand(8, 20))
+
+
+def scroll_to_element(
+    page: Any,
+    raw: RawMouse,
+    selector: str,
+    cursor_x: float, cursor_y: float,
+    cfg: HumanConfig,
+) -> Tuple[dict, float, float]:
+    viewport = page.viewport_size
+    if not viewport:
+        raise RuntimeError("Viewport size not available")
+
+    viewport_height = viewport["height"]
+    viewport_width = viewport["width"]
+
+    box = _get_element_box(page, selector)
+    if box is None:
+        sleep_ms(200)
+        box = _get_element_box(page, selector)
+        if box is None:
+            raise RuntimeError(f"Element not found: {selector}")
+
+    if _is_in_viewport(box, viewport_height, cfg):
+        return box, cursor_x, cursor_y
+
+    # Move cursor into scroll area
+    scroll_area_x = round(viewport_width * rand(0.3, 0.7))
+    scroll_area_y = round(viewport_height * rand(0.3, 0.7))
+    human_move(raw, cursor_x, cursor_y, scroll_area_x, scroll_area_y, cfg)
+    cursor_x = scroll_area_x
+    cursor_y = scroll_area_y
+    sleep_ms(rand_range(cfg.scroll_pre_move_delay))
+
+    # Calculate scroll distance
+    target_y = viewport_height * rand(cfg.scroll_target_zone[0], cfg.scroll_target_zone[1])
+    element_center = box["y"] + box["height"] / 2
+    distance_to_scroll = element_center - target_y
+
+    direction = 1 if distance_to_scroll > 0 else -1
+    abs_distance = abs(distance_to_scroll)
+    avg_delta = (cfg.scroll_delta_base[0] + cfg.scroll_delta_base[1]) / 2
+    total_clicks = max(3, math.ceil(abs_distance / avg_delta))
+    accel_steps = rand_int_range(cfg.scroll_accel_steps)
+    decel_steps = rand_int_range(cfg.scroll_decel_steps)
+
+    # Scroll loop: accelerate → cruise → decelerate
+    scrolled = 0
+    for i in range(total_clicks):
+        if i < accel_steps:
+            delta = rand(80, 100)
+            pause = rand_range(cfg.scroll_pause_slow)
+        elif i >= total_clicks - decel_steps:
+            delta = rand(60, 90)
+            pause = rand_range(cfg.scroll_pause_slow)
+        else:
+            delta = rand_range(cfg.scroll_delta_base)
+            pause = rand_range(cfg.scroll_pause_fast)
+
+        delta *= 1 + (random.random() - 0.5) * 2 * cfg.scroll_delta_variance
+        delta = round(delta) * direction
+
+        _smooth_wheel(raw, delta, cfg)
+        scrolled += abs(delta)
+        sleep_ms(pause)
+
+        # Check visibility every 3 steps
+        if i % 3 == 2 or i == total_clicks - 1:
+            box = _get_element_box(page, selector)
+            if box and _is_in_viewport(box, viewport_height, cfg):
+                break
+        if scrolled >= abs_distance * 1.1:
+            break
+
+    # Optional overshoot + correction
+    if random.random() < cfg.scroll_overshoot_chance:
+        overshoot_px = round(rand_range(cfg.scroll_overshoot_px)) * direction
+        _smooth_wheel(raw, overshoot_px, cfg)
+        sleep_ms(rand_range(cfg.scroll_settle_delay))
+        corrections = rand_int_range((1, 2))
+        for _ in range(corrections):
+            corr_delta = round(rand(40, 80)) * -direction
+            _smooth_wheel(raw, corr_delta, cfg)
+            sleep_ms(rand(100, 250))
+
+    # Settle
+    sleep_ms(rand_range(cfg.scroll_settle_delay))
+
+    box = _get_element_box(page, selector)
+    if box is None:
+        raise RuntimeError(f"Element lost after scrolling: {selector}")
+
+    return box, cursor_x, cursor_y

cloakbrowser/human/scroll_async.py

@@ -0,0 +1,129 @@
+"""cloakbrowser-human — Async human-like scrolling via mouse wheel events.
+
+Mirrors scroll.py but uses ``await`` for all Playwright calls and
+``async_sleep_ms`` instead of ``sleep_ms``.
+"""
+
+from __future__ import annotations
+
+import math
+import random
+from typing import Any, Optional, Tuple
+
+from .config import HumanConfig, rand, rand_range, rand_int_range, async_sleep_ms
+from .mouse_async import AsyncRawMouse, async_human_move
+from .scroll import _is_in_viewport
+
+
+async def _get_element_box_async(page: Any, selector: str) -> Optional[dict]:
+    try:
+        el = page.locator(selector).first
+        return await el.bounding_box(timeout=2000)
+    except Exception:
+        return None
+
+
+async def _async_smooth_wheel(raw: AsyncRawMouse, delta: int, cfg: HumanConfig) -> None:
+    """Send one logical scroll as a burst of small wheel events (like real inertia)."""
+    abs_d = abs(delta)
+    sign = 1 if delta > 0 else -1
+    sent = 0
+    while sent < abs_d:
+        step_size = rand(20, 40)
+        chunk = min(step_size, abs_d - sent)
+        await raw.wheel(0, round(chunk) * sign)
+        sent += chunk
+        await async_sleep_ms(rand(8, 20))
+
+
+async def async_scroll_to_element(
+    page: Any,
+    raw: AsyncRawMouse,
+    selector: str,
+    cursor_x: float, cursor_y: float,
+    cfg: HumanConfig,
+) -> Tuple[dict, float, float]:
+    viewport = page.viewport_size
+    if not viewport:
+        raise RuntimeError("Viewport size not available")
+
+    viewport_height = viewport["height"]
+    viewport_width = viewport["width"]
+
+    box = await _get_element_box_async(page, selector)
+    if box is None:
+        await async_sleep_ms(200)
+        box = await _get_element_box_async(page, selector)
+        if box is None:
+            raise RuntimeError(f"Element not found: {selector}")
+
+    if _is_in_viewport(box, viewport_height, cfg):
+        return box, cursor_x, cursor_y
+
+    # Move cursor into scroll area
+    scroll_area_x = round(viewport_width * rand(0.3, 0.7))
+    scroll_area_y = round(viewport_height * rand(0.3, 0.7))
+    await async_human_move(raw, cursor_x, cursor_y, scroll_area_x, scroll_area_y, cfg)
+    cursor_x = scroll_area_x
+    cursor_y = scroll_area_y
+    await async_sleep_ms(rand_range(cfg.scroll_pre_move_delay))
+
+    # Calculate scroll distance
+    target_y = viewport_height * rand(cfg.scroll_target_zone[0], cfg.scroll_target_zone[1])
+    element_center = box["y"] + box["height"] / 2
+    distance_to_scroll = element_center - target_y
+
+    direction = 1 if distance_to_scroll > 0 else -1
+    abs_distance = abs(distance_to_scroll)
+    avg_delta = (cfg.scroll_delta_base[0] + cfg.scroll_delta_base[1]) / 2
+    total_clicks = max(3, math.ceil(abs_distance / avg_delta))
+    accel_steps = rand_int_range(cfg.scroll_accel_steps)
+    decel_steps = rand_int_range(cfg.scroll_decel_steps)
+
+    # Scroll loop: accelerate → cruise → decelerate
+    scrolled = 0
+    for i in range(total_clicks):
+        if i < accel_steps:
+            delta = rand(80, 100)
+            pause = rand_range(cfg.scroll_pause_slow)
+        elif i >= total_clicks - decel_steps:
+            delta = rand(60, 90)
+            pause = rand_range(cfg.scroll_pause_slow)
+        else:
+            delta = rand_range(cfg.scroll_delta_base)
+            pause = rand_range(cfg.scroll_pause_fast)
+
+        delta *= 1 + (random.random() - 0.5) * 2 * cfg.scroll_delta_variance
+        delta = round(delta) * direction
+
+        await _async_smooth_wheel(raw, delta, cfg)
+        scrolled += abs(delta)
+        await async_sleep_ms(pause)
+
+        # Check visibility every 3 steps
+        if i % 3 == 2 or i == total_clicks - 1:
+            box = await _get_element_box_async(page, selector)
+            if box and _is_in_viewport(box, viewport_height, cfg):
+                break
+        if scrolled >= abs_distance * 1.1:
+            break
+
+    # Optional overshoot + correction
+    if random.random() < cfg.scroll_overshoot_chance:
+        overshoot_px = round(rand_range(cfg.scroll_overshoot_px)) * direction
+        await _async_smooth_wheel(raw, overshoot_px, cfg)
+        await async_sleep_ms(rand_range(cfg.scroll_settle_delay))
+        corrections = rand_int_range((1, 2))
+        for _ in range(corrections):
+            corr_delta = round(rand(40, 80)) * -direction
+            await _async_smooth_wheel(raw, corr_delta, cfg)
+            await async_sleep_ms(rand(100, 250))
+
+    # Settle
+    await async_sleep_ms(rand_range(cfg.scroll_settle_delay))
+
+    box = await _get_element_box_async(page, selector)
+    if box is None:
+        raise RuntimeError(f"Element lost after scrolling: {selector}")
+
+    return box, cursor_x, cursor_y

examples/basic.py

@@ -2,6 +2,7 @@
 
 from cloakbrowser import launch
 
+print("Launching stealth browser...", flush=True)
 browser = launch(headless=False)
 page = browser.new_page()
 

examples/fingerprint_scan_test.py

@@ -0,0 +1,229 @@
+"""Test against fingerprint-scan.com and CreepJS.
+
+Tests the specific headless detection signals flagged by the community:
+- noTaskbar, noContentIndex, noContactsManager, noDownlinkMax
+- Bot risk score (fingerprint-scan.com)
+- Headless/stealth percentages (CreepJS)
+- Full CreepJS signal breakdown (likeHeadless, headless, stealth)
+
+Usage:
+    python examples/fingerprint_scan_test.py
+    python examples/fingerprint_scan_test.py --proxy http://10.50.96.5:8888
+    python examples/fingerprint_scan_test.py --headless
+"""
+
+import sys
+import time
+
+from cloakbrowser import launch_context
+
+HEADLESS = "--headless" in sys.argv
+PROXY = None
+for i, arg in enumerate(sys.argv):
+    if arg == "--proxy" and i + 1 < len(sys.argv):
+        PROXY = sys.argv[i + 1]
+
+
+def test_fingerprint_scan(page):
+    """fingerprint-scan.com — bot risk score + headless detection signals."""
+    print("=== fingerprint-scan.com ===")
+    page.goto("https://fingerprint-scan.com/", wait_until="domcontentloaded", timeout=30000)
+    time.sleep(20)  # Castle.js needs time to compute score
+
+    # Check bot risk score
+    score = page.evaluate(
+        'document.getElementById("fingerprintScore")?.textContent || "Score not rendered"'
+    )
+    print(f"Bot Risk Score: {score}")
+
+    # Check headless detection signals
+    apis = page.evaluate("""() => ({
+        noTaskbar: screen.height === screen.availHeight,
+        taskbarSize: screen.height - screen.availHeight,
+        noContentIndex: typeof window.ContentIndex === "undefined",
+        noContactsManager: !("contacts" in navigator),
+        noDownlinkMax: !("downlinkMax" in (navigator.connection || {})),
+        downlinkMax: navigator.connection?.downlinkMax ?? null,
+        timezone: Intl.DateTimeFormat().resolvedOptions().timeZone,
+        webdriver: navigator.webdriver,
+        isPlaywright: "__pwInitScripts" in window || "__playwright__binding__" in window,
+        webgpu: typeof navigator.gpu !== "undefined" ? "available" : "NOT_AVAILABLE",
+        scrollbarWidth: (() => { const d = document.createElement("div"); d.style.cssText = "overflow:scroll;width:100px;height:100px;position:absolute;top:-999px"; document.body.appendChild(d); const w = d.offsetWidth - d.clientWidth; d.remove(); return w; })()
+    })""")
+
+    print("\nHeadless detection signals:")
+    headless_fails = 0
+    for k, v in apis.items():
+        is_fail = k.startswith("no") and v is True
+        if is_fail:
+            headless_fails += 1
+        flag = "FAIL" if is_fail else ""
+        print(f"  {k}: {v}  {flag}")
+
+    # Extract bot test results from page
+    bot_tests = page.evaluate("""() => {
+        const text = document.body.innerText;
+        const tests = {};
+        for (const key of ['WebDriver', 'Is Selenium Chrome', 'CDP Check', 'Is Playwright']) {
+            const match = text.match(new RegExp(key + '\\\\s+(true|false)'));
+            if (match) tests[key] = match[1];
+        }
+        return tests;
+    }""")
+    print("\nBot Detection Tests:")
+    for k, v in bot_tests.items():
+        status = "PASS" if v == "false" else "FAIL"
+        print(f"  {k}: {v}  [{status}]")
+
+    page.screenshot(path="/results/fingerprint-scan.png", full_page=True)
+    print("\nScreenshot: /results/fingerprint-scan.png")
+
+    return {
+        "score": score,
+        "headless_fails": headless_fails,
+        "apis": apis,
+        "bot_tests": bot_tests,
+    }
+
+
+def test_creepjs(page):
+    """abrahamjuliot.github.io/creepjs — comprehensive fingerprint analysis."""
+    print("\n=== CreepJS ===")
+    page.goto(
+        "https://abrahamjuliot.github.io/creepjs/", wait_until="domcontentloaded", timeout=30000
+    )
+    print("Waiting 30s for CreepJS analysis...")
+    time.sleep(30)
+
+    # Extract % scores from page text (matches test-infra/matrix_tests/group3_bot_detection.py)
+    scores = page.evaluate("""() => {
+        const text = document.body.innerText;
+        const likeMatch = text.match(/(\\d+)%\\s*like headless/i);
+        const headlessMatch = text.match(/(\\d+)%\\s*headless:/i);
+        const stealthMatch = text.match(/(\\d+)%\\s*stealth:/i);
+        return {
+            likeHeadlessPct: likeMatch ? parseInt(likeMatch[1]) : null,
+            headlessPct: headlessMatch ? parseInt(headlessMatch[1]) : null,
+            stealthPct: stealthMatch ? parseInt(stealthMatch[1]) : null,
+        };
+    }""")
+
+    print(f"\nScores:")
+    print(f"  like-headless: {scores['likeHeadlessPct']}%  (target: <=30%)")
+    print(f"  headless:      {scores['headlessPct']}%  (target: 0%)")
+    print(f"  stealth:       {scores['stealthPct']}%  (target: 0%)")
+
+    # Extract full signal breakdown from window.Fingerprint.headless (CreepJS internal object)
+    signals = page.evaluate("""() => {
+        try {
+            const fp = window.Fingerprint;
+            if (!fp || !fp.headless) return null;
+            return {
+                likeHeadless: fp.headless.likeHeadless || null,
+                headless: fp.headless.headless || null,
+                stealth: fp.headless.stealth || null,
+            };
+        } catch { return null; }
+    }""")
+
+    if signals:
+        if signals.get("likeHeadless"):
+            print("\nlikeHeadless signals:")
+            fails = 0
+            for k, v in signals["likeHeadless"].items():
+                is_fail = v is True
+                if is_fail:
+                    fails += 1
+                flag = " FAIL" if is_fail else ""
+                print(f"  {k}: {v}{flag}")
+            print(f"  ({fails} fails)")
+
+        if signals.get("headless"):
+            print("\nheadless signals:")
+            for k, v in signals["headless"].items():
+                flag = " FAIL" if v is True else ""
+                print(f"  {k}: {v}{flag}")
+
+        if signals.get("stealth"):
+            print("\nstealth signals:")
+            for k, v in signals["stealth"].items():
+                flag = " FAIL" if v is True else ""
+                print(f"  {k}: {v}{flag}")
+    else:
+        print("\n(window.Fingerprint.headless not available — signals not extracted)")
+
+    # Extract platform estimate
+    platform = page.evaluate("""() => {
+        try {
+            const fp = window.Fingerprint;
+            if (!fp || !fp.platformEstimate) return null;
+            return fp.platformEstimate;
+        } catch { return null; }
+    }""")
+    if platform:
+        print(f"\nPlatform estimate: {platform}")
+
+    passed = (
+        scores["headlessPct"] is not None
+        and scores["headlessPct"] <= 30
+        and scores["stealthPct"] is not None
+        and scores["stealthPct"] <= 30
+    )
+    print(f"\nVerdict: {'PASS' if passed else 'FAIL'} (<=30% headless, <=30% stealth)")
+
+    page.screenshot(path="/results/creepjs.png", full_page=True)
+    print("Screenshot: /results/creepjs.png")
+
+    return {**scores, "signals": signals, "platform": platform}
+
+
+def main():
+    print("=" * 60)
+    print("CloakBrowser — Fingerprint & Headless Detection Tests")
+    print("=" * 60)
+    print(f"Mode: {'headless' if HEADLESS else 'headed'}")
+    print(f"Proxy: {PROXY or 'none'}")
+    print()
+
+    print("Launching stealth browser...", flush=True)
+    context = launch_context(
+        headless=HEADLESS,
+        proxy=PROXY,
+        args=[
+            "--fingerprint-screen-width=1920",
+            "--fingerprint-screen-height=1080",
+            "--fingerprint-timezone=Asia/Jerusalem",
+        ],
+    )
+    page = context.new_page()
+
+    try:
+        fp_result = test_fingerprint_scan(page)
+        creep_result = test_creepjs(page)
+    finally:
+        context.close()
+
+    # Summary
+    print("\n" + "=" * 60)
+    print("SUMMARY")
+    print("=" * 60)
+    print(f"fingerprint-scan.com: {fp_result['score']}")
+    print(f"  Headless signal fails: {fp_result['headless_fails']}")
+    like = creep_result["likeHeadlessPct"]
+    headless = creep_result["headlessPct"]
+    stealth = creep_result["stealthPct"]
+    print(f"CreepJS: like-headless={like}%, headless={headless}%, stealth={stealth}%")
+
+    # Count CreepJS signal fails
+    sigs = creep_result.get("signals")
+    if sigs and sigs.get("likeHeadless"):
+        fail_names = [k for k, v in sigs["likeHeadless"].items() if v is True]
+        if fail_names:
+            print(f"  likeHeadless fails: {', '.join(fail_names)}")
+    print("=" * 60)
+
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

examples/integrations/agent_browser.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+# agent-browser + CloakBrowser: AI browser agent with stealth fingerprints.
+#
+# agent-browser is a Node.js CLI for browser automation with session management.
+# CloakBrowser provides the stealth Chromium binary.
+#
+# Requires: npm install -g agent-browser
+#           pip install cloakbrowser (to auto-download the binary)
+#
+# Note: agent-browser launches Chrome itself via env vars — it can't connect
+# to an existing browser via CDP. So we pass the binary path and stealth args directly.
+
+# Get CloakBrowser binary path (auto-downloads if needed)
+BINARY_PATH=$(python3 -c "from cloakbrowser.download import ensure_binary; print(ensure_binary())")
+
+# Get stealth args from our wrapper (comma-separated for agent-browser)
+STEALTH_ARGS=$(python3 -c "from cloakbrowser.config import get_default_stealth_args; print(','.join(get_default_stealth_args()))")
+
+# Point agent-browser at CloakBrowser
+export AGENT_BROWSER_EXECUTABLE_PATH="$BINARY_PATH"
+export AGENT_BROWSER_ARGS="$STEALTH_ARGS"
+
+# Open a page
+agent-browser --session stealth-test open "https://example.com"
+
+# Get page title
+agent-browser --session stealth-test eval "document.title"
+
+# Check stealth
+agent-browser --session stealth-test eval "JSON.stringify({webdriver: navigator.webdriver, plugins: navigator.plugins.length, platform: navigator.platform})"

examples/integrations/browser_use_example.py

@@ -0,0 +1,43 @@
+"""browser-use + CloakBrowser: AI agent with stealth fingerprints.
+
+browser-use handles AI agent logic, CloakBrowser handles bot detection.
+Your agent can now browse sites behind Cloudflare, reCAPTCHA, DataDome.
+
+Requires: pip install browser-use cloakbrowser langchain-openai
+Set OPENAI_API_KEY (or swap for another LLM provider).
+"""
+
+import asyncio
+
+from browser_use import Agent, Browser, BrowserConfig
+from langchain_openai import ChatOpenAI
+
+from cloakbrowser import launch_async
+
+
+async def main():
+    # Step 1: Launch CloakBrowser (handles binary, stealth args, fingerprints)
+    cb_browser = await launch_async(
+        headless=True,
+        args=["--remote-debugging-port=9242", "--remote-debugging-address=127.0.0.1"],
+    )
+
+    # Step 2: Connect browser-use to the stealth browser via CDP
+    config = BrowserConfig(cdp_url="http://127.0.0.1:9242")
+    browser = Browser(config=config)
+
+    # Step 3: Run your AI agent — it browses through CloakBrowser
+    agent = Agent(
+        task="Go to https://www.google.com and search for 'browser automation'",
+        llm=ChatOpenAI(model="gpt-4o-mini"),
+        browser=browser,
+    )
+
+    result = await agent.run()
+    print(result)
+
+    await cb_browser.close()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

examples/integrations/crawl4ai_example.py

@@ -0,0 +1,39 @@
+"""Crawl4AI + CloakBrowser: LLM-ready web crawling with stealth fingerprints.
+
+Crawl4AI handles extraction and markdown conversion,
+CloakBrowser handles bot detection.
+
+Requires: pip install crawl4ai cloakbrowser
+"""
+
+import asyncio
+
+from crawl4ai import AsyncWebCrawler, BrowserConfig, CrawlerRunConfig
+
+from cloakbrowser import launch_async
+
+
+async def main():
+    # Step 1: Launch CloakBrowser with remote debugging
+    cb_browser = await launch_async(
+        headless=True,
+        args=["--remote-debugging-port=9243", "--remote-debugging-address=127.0.0.1"],
+    )
+
+    # Step 2: Connect Crawl4AI to the stealth browser via CDP
+    browser_config = BrowserConfig(cdp_url="http://127.0.0.1:9243")
+    run_config = CrawlerRunConfig()
+
+    async with AsyncWebCrawler(config=browser_config) as crawler:
+        result = await crawler.arun(
+            "https://example.com",
+            config=run_config,
+        )
+        print(f"Extracted {len(result.markdown)} chars of markdown")
+        print(result.markdown[:500])
+
+    await cb_browser.close()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

examples/integrations/langchain_loader.py

@@ -0,0 +1,51 @@
+"""LangChain + CloakBrowser: load web pages behind bot detection into LangChain Documents.
+
+LangChain's PlaywrightURLLoader hardcodes chromium.launch() with no way to pass
+a custom binary. This example uses CloakBrowser directly as a stealth document loader
+that produces LangChain Document objects.
+
+Requires: pip install langchain-core cloakbrowser
+"""
+
+import asyncio
+
+from langchain_core.documents import Document
+
+from cloakbrowser import launch_async
+
+
+async def load_urls_stealth(urls: list[str], **launch_kwargs) -> list[Document]:
+    """Load URLs using CloakBrowser stealth browser, return LangChain Documents."""
+    browser = await launch_async(headless=True, **launch_kwargs)
+    page = await browser.new_page()
+    docs = []
+
+    for url in urls:
+        await page.goto(url, wait_until="domcontentloaded")
+        text = await page.evaluate("document.body.innerText")
+        title = await page.title()
+        docs.append(Document(
+            page_content=text,
+            metadata={"source": url, "title": title},
+        ))
+
+    await browser.close()
+    return docs
+
+
+async def main():
+    urls = [
+        "https://example.com",
+        "https://httpbin.org/html",
+    ]
+
+    docs = await load_urls_stealth(urls)
+
+    for doc in docs:
+        print(f"--- {doc.metadata['title']} ({doc.metadata['source']}) ---")
+        print(doc.page_content[:300])
+        print()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

examples/integrations/scrapling_example.py

@@ -0,0 +1,42 @@
+"""Scrapling + CloakBrowser: adaptive web scraping with stealth fingerprints.
+
+Scrapling handles parsing and element tracking,
+CloakBrowser handles bot detection.
+
+Requires: pip install scrapling[all] cloakbrowser
+"""
+
+import asyncio
+import json
+from urllib.request import urlopen
+
+from scrapling.fetchers import StealthyFetcher
+
+from cloakbrowser import launch_async
+
+
+async def main():
+    # Launch CloakBrowser with remote debugging
+    cb_browser = await launch_async(
+        headless=True,
+        args=["--remote-debugging-port=9245", "--remote-debugging-address=127.0.0.1"],
+    )
+
+    # Get the WebSocket URL from Chrome (Scrapling requires ws:// scheme)
+    info = json.loads(urlopen("http://127.0.0.1:9245/json/version").read())
+    ws_url = info["webSocketDebuggerUrl"]
+
+    # Connect Scrapling to the stealth browser via CDP
+    page = await StealthyFetcher.async_fetch(
+        "https://example.com",
+        cdp_url=ws_url,
+    )
+
+    print(f"Title: {page.css('title::text').get()}")
+    print(f"Text: {page.css('p::text').getall()}")
+
+    await cb_browser.close()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

examples/integrations/selenium_example.py

@@ -0,0 +1,41 @@
+"""Selenium + CloakBrowser: use stealth Chromium with Selenium WebDriver.
+
+CloakBrowser provides the binary and stealth args.
+Selenium drives it via ChromeDriver.
+
+Requires: pip install selenium cloakbrowser
+Note: ChromeDriver version must match Chromium 145.
+      pip install chromedriver-autoinstaller or download manually.
+"""
+
+from selenium import webdriver
+from selenium.webdriver.chrome.options import Options
+
+from cloakbrowser.config import get_default_stealth_args
+from cloakbrowser.download import ensure_binary
+
+binary_path = ensure_binary()
+stealth_args = get_default_stealth_args()
+
+options = Options()
+options.binary_location = binary_path
+options.add_argument("--headless")
+for arg in stealth_args:
+    options.add_argument(arg)
+
+driver = webdriver.Chrome(options=options)
+
+driver.get("https://example.com")
+print(f"Selenium + CloakBrowser: {driver.title}")
+
+# Verify stealth
+result = driver.execute_script("""
+    return {
+        webdriver: navigator.webdriver,
+        plugins: navigator.plugins.length,
+        platform: navigator.platform,
+    }
+""")
+print(f"Stealth checks: {result}")
+
+driver.quit()

examples/integrations/undetected_chromedriver.py

@@ -0,0 +1,40 @@
+"""undetected-chromedriver + CloakBrowser: double stealth layer.
+
+undetected-chromedriver patches ChromeDriver detection signals,
+CloakBrowser patches the browser fingerprints at the C++ level.
+
+Requires: pip install undetected-chromedriver cloakbrowser
+"""
+
+import undetected_chromedriver as uc
+
+from cloakbrowser.config import get_chromium_version, get_default_stealth_args
+from cloakbrowser.download import ensure_binary
+
+binary_path = ensure_binary()
+stealth_args = get_default_stealth_args()
+chromium_major = int(get_chromium_version().split(".")[0])
+
+options = uc.ChromeOptions()
+options.binary_location = binary_path
+options.add_argument("--headless")
+for arg in stealth_args:
+    options.add_argument(arg)
+
+driver = uc.Chrome(options=options, version_main=chromium_major)
+
+driver.get("https://example.com")
+print(f"undetected-chromedriver + CloakBrowser: {driver.title}")
+
+# Verify stealth
+result = driver.execute_script("""
+    return {
+        webdriver: navigator.webdriver,
+        plugins: navigator.plugins.length,
+        platform: navigator.platform,
+        hardwareConcurrency: navigator.hardwareConcurrency,
+    }
+""")
+print(f"Stealth checks: {result}")
+
+driver.quit()

examples/persistent_context.py

@@ -0,0 +1,31 @@
+"""Persistent context example: cookies and localStorage survive across sessions."""
+
+from cloakbrowser import launch_persistent_context
+
+PROFILE_DIR = "./my-profile"
+
+# Session 1 — set some state
+print("=== Session 1: Setting state ===")
+print("Launching stealth browser...", flush=True)
+ctx = launch_persistent_context(PROFILE_DIR, headless=False)
+page = ctx.new_page()
+page.goto("https://example.com")
+page.evaluate("document.cookie = 'session=abc123; path=/; max-age=3600'")
+page.evaluate("localStorage.setItem('user', 'returning')")
+print(f"Cookie: {page.evaluate('document.cookie')}")
+ls_val = page.evaluate("localStorage.getItem('user')")
+print(f"localStorage: {ls_val}")
+ctx.close()
+
+# Session 2 — state is restored
+print("\n=== Session 2: Verifying persistence ===")
+print("Launching stealth browser...", flush=True)
+ctx = launch_persistent_context(PROFILE_DIR, headless=False)
+page = ctx.new_page()
+page.goto("https://example.com")
+print(f"Cookie: {page.evaluate('document.cookie')}")
+ls_val = page.evaluate("localStorage.getItem('user')")
+print(f"localStorage: {ls_val}")
+ctx.close()
+
+print("\nDone!")

examples/recaptcha_score.py

@@ -5,8 +5,11 @@ Expected: 0.9 (human-level) with cloakbrowser.
 Default Playwright typically scores 0.1-0.3.
 """
 
+import time
+
 from cloakbrowser import launch
 
+print("Launching stealth browser...", flush=True)
 browser = launch(headless=True)
 page = browser.new_page()
 
@@ -18,7 +21,7 @@ page.wait_for_load_state("networkidle")
 button = page.query_selector("button")
 if button:
     button.click()
-    page.wait_for_timeout(3000)
+    time.sleep(3)
 
 # Extract score from page
 content = page.content()

examples/stealth_test.py

@@ -27,7 +27,7 @@ for i, arg in enumerate(sys.argv):
 def test_bot_sannysoft(page):
     """bot.sannysoft.com — classic bot detection checks."""
     page.goto("https://bot.sannysoft.com", wait_until="networkidle", timeout=30000)
-    page.wait_for_timeout(3000)
+    time.sleep(3)
 
     results = page.evaluate("""() => {
         const rows = document.querySelectorAll('table tr');
@@ -53,28 +53,34 @@ def test_bot_sannysoft(page):
 def test_bot_incolumitas(page):
     """bot.incolumitas.com — comprehensive 30+ check bot detection."""
     page.goto("https://bot.incolumitas.com", wait_until="networkidle", timeout=30000)
-    page.wait_for_timeout(12000)  # needs time to run all detection tests
 
-    # Site outputs JSON blocks in page text, not HTML tables
-    results = page.evaluate("""() => {
-        const text = document.body.innerText;
-        const okMatches = text.match(/"\\w+":\\s*"OK"/g) || [];
-        const failMatches = text.match(/"\\w+":\\s*"FAIL"/g) || [];
-        const failedTests = failMatches.map(m => m.match(/"(\\w+)"/)[1]);
-        return {
-            passed: okMatches.length,
-            failed: failMatches.length,
-            failedTests,
-            total: okMatches.length + failMatches.length
-        };
-    }""")
+    # Poll until test count stabilizes (site runs tests progressively)
+    last_total = 0
+    for _ in range(15):
+        time.sleep(2)
+        results = page.evaluate("""() => {
+            const text = document.body.innerText;
+            const okMatches = text.match(/"\\w+":\\s*"OK"/g) || [];
+            const failMatches = text.match(/"\\w+":\\s*"FAIL"/g) || [];
+            const failedTests = failMatches.map(m => m.match(/"(\\w+)"/)[1]);
+            return {
+                passed: okMatches.length,
+                failed: failMatches.length,
+                failedTests,
+                total: okMatches.length + failMatches.length
+            };
+        }""")
+        if results["total"] >= 30 and results["total"] == last_total:
+            break
+        last_total = results["total"]
+
     return results
 
 
 def test_browserscan(page):
     """browserscan.net/bot-detection — WebDriver, UA, CDP, Navigator checks."""
     page.goto("https://www.browserscan.net/bot-detection", wait_until="networkidle", timeout=30000)
-    page.wait_for_timeout(5000)
+    time.sleep(5)
 
     results = page.evaluate("""() => {
         const items = document.querySelectorAll('[class*="result"], [class*="item"], [class*="check"]');
@@ -95,7 +101,7 @@ def test_browserscan(page):
 def test_deviceandbrowserinfo(page):
     """deviceandbrowserinfo.com/are_you_a_bot — fingerprint + behavioral detection."""
     page.goto("https://deviceandbrowserinfo.com/are_you_a_bot", wait_until="domcontentloaded", timeout=30000)
-    page.wait_for_timeout(8000)
+    time.sleep(8)
 
     results = page.evaluate("""() => {
         const text = document.body.innerText;
@@ -119,13 +125,13 @@ def test_deviceandbrowserinfo(page):
 
 def test_fingerprintjs(page):
     """demo.fingerprint.com/web-scraping — industry-standard bot detection."""
-    page.goto("https://demo.fingerprint.com/web-scraping", wait_until="networkidle", timeout=30000)
-    page.wait_for_timeout(5000)
+    page.goto("https://demo.fingerprint.com/web-scraping", wait_until="domcontentloaded", timeout=30000)
+    time.sleep(8)
 
     # Click search to trigger bot detection — bots get blocked, humans see flights
     try:
         page.click("button:has-text('Search')", timeout=5000)
-        page.wait_for_timeout(5000)
+        time.sleep(5)
     except Exception:
         pass
 
@@ -143,22 +149,21 @@ def test_recaptcha(page):
     """recaptcha-demo.appspot.com — Google's official reCAPTCHA v3 score."""
     page.goto(
         "https://recaptcha-demo.appspot.com/recaptcha-v3-request-scores.php",
-        wait_until="networkidle",
+        wait_until="domcontentloaded",
         timeout=30000,
     )
-    # Page auto-submits via grecaptcha.execute() — wait for backend response
-    page.wait_for_timeout(8000)
+    # Wait for score to appear (polls up to 30s)
+    for _ in range(15):
+        time.sleep(2)
+        score = page.evaluate("""() => {
+            const text = document.body.innerText;
+            const match = text.match(/"score":\\s*(\\d+\\.\\d+)/);
+            return match ? parseFloat(match[1]) : null;
+        }""")
+        if score is not None:
+            break
 
-    results = page.evaluate("""() => {
-        const text = document.body.innerText;
-        // Score appears in JSON response block: "score": 0.9
-        const scoreMatch = text.match(/"score":\\s*(\\d+\\.\\d+)/);
-        return {
-            score: scoreMatch ? parseFloat(scoreMatch[1]) : null,
-            pageText: text.substring(0, 500)
-        };
-    }""")
-    return results
+    return {"score": score}
 
 
 TESTS = [
@@ -175,8 +180,11 @@ TESTS = [
         "url": "https://bot.incolumitas.com",
         "runner": test_bot_incolumitas,
         "verdict": lambda r: f"{r['passed']}/{r['total']} passed"
-            + (f" (FAILED: {', '.join(r.get('failedTests', []))})" if r.get("failed", 0) > 0 else " — ALL GREEN"),
-        "pass": lambda r: r.get("failed", 0) <= 1,  # fpscanner.WEBDRIVER false positive expected (all builds)
+            + (" — ALL GREEN" if r.get("failed", 0) == 0
+               else f" (FAILED: {', '.join(r.get('failedTests', []))} — known false positives)"
+               if set(r.get("failedTests", [])) <= {"WEBDRIVER", "connectionRTT"}
+               else f" (FAILED: {', '.join(r.get('failedTests', []))})"),
+        "pass": lambda r: set(r.get("failedTests", [])) <= {"WEBDRIVER", "connectionRTT"},  # known false positives
     },
     {
         "name": "BrowserScan",
@@ -218,10 +226,54 @@ def main():
     print(f"Screenshots: {'on' if SCREENSHOTS else 'off'}")
     print(f"Proxy: {PROXY or 'none'}")
     print()
+    print("Launching stealth browser...", flush=True)
 
     browser = launch(headless=not HEADED, proxy=PROXY)
     page = browser.new_page()
 
+    # Show browser fingerprint details
+    try:
+        import re
+        info = page.evaluate("""async () => {
+            const ua = navigator.userAgent;
+            let fullVersion = null;
+            try {
+                const data = await navigator.userAgentData.getHighEntropyValues(['fullVersionList', 'platform', 'platformVersion']);
+                const chrome = data.fullVersionList.find(b => b.brand === 'Chromium' || b.brand === 'Google Chrome');
+                fullVersion = chrome ? chrome.version : null;
+            } catch {}
+            const gl = document.createElement('canvas').getContext('webgl');
+            const dbg = gl ? gl.getExtension('WEBGL_debug_renderer_info') : null;
+            return {
+                ua,
+                fullVersion,
+                platform: navigator.platform,
+                cores: navigator.hardwareConcurrency,
+                gpu: dbg ? gl.getParameter(dbg.UNMASKED_RENDERER_WEBGL) : 'N/A',
+                gpuVendor: dbg ? gl.getParameter(dbg.UNMASKED_VENDOR_WEBGL) : 'N/A',
+                screen: screen.width + 'x' + screen.height,
+                languages: navigator.languages.join(', '),
+            };
+        }""")
+        # Condensed UA
+        ua_short = re.sub(r'^Mozilla/5\.0 \(', '', info["ua"])
+        ua_short = re.sub(r'\) AppleWebKit/[\d.]+ \(KHTML, like Gecko\) ', ' | ', ua_short)
+        print(f"UA: {ua_short}", flush=True)
+        print(f"Platform: {info['platform']} | Cores: {info['cores']} | Screen: {info['screen']}", flush=True)
+        print(f"GPU: {info['gpuVendor']} — {info['gpu']}", flush=True)
+    except Exception:
+        print("Chrome: could not detect", flush=True)
+
+    # Show IP address
+    try:
+        page.goto("https://httpbin.org/ip", timeout=10000)
+        ip = page.evaluate("JSON.parse(document.body.innerText).origin")
+        print(f"IP: {ip}", flush=True)
+    except Exception:
+        print("IP: could not detect", flush=True)
+
+    print(f"Running {len(TESTS)} tests (this takes ~2 minutes)...\n", flush=True)
+
     results_summary = []
 
     for test in TESTS:

js/README.md

@@ -0,0 +1,284 @@
+<p align="center">
+<img src="https://i.imgur.com/cqkp6fG.png" width="500" alt="CloakBrowser">
+</p>
+
+# CloakBrowser
+
+[![npm](https://img.shields.io/npm/v/cloakbrowser)](https://www.npmjs.com/package/cloakbrowser)
+[![License](https://img.shields.io/github/license/CloakHQ/CloakBrowser)](https://github.com/CloakHQ/CloakBrowser/blob/main/LICENSE)
+
+**Stealth Chromium that passes every bot detection test.**
+
+Drop-in Playwright/Puppeteer replacement. Same API, same code — just swap the import. **3 lines of code, 30 seconds to unblock.**
+
+- **33 source-level C++ patches** — canvas, WebGL, audio, fonts, GPU, screen, automation signals
+- **0.9 reCAPTCHA v3 score** — human-level, server-verified
+- **Passes Cloudflare Turnstile**, FingerprintJS, BrowserScan — tested against 30+ detection sites
+- **`npm install cloakbrowser`** — binary auto-downloads, auto-updates, zero config
+- **Free and open source** — no subscriptions, no usage limits
+- **Works with any framework** — tested with browser-use, Crawl4AI, Scrapling, Stagehand ([example](examples/stagehand.ts)), LangChain, Selenium, and more
+
+## Install
+
+```bash
+# With Playwright
+npm install cloakbrowser playwright-core
+
+# With Puppeteer
+npm install cloakbrowser puppeteer-core
+```
+
+On first launch, the stealth Chromium binary auto-downloads (~200MB, cached at `~/.cloakbrowser/`).
+
+## Usage
+
+### Playwright (default)
+
+```javascript
+import { launch } from 'cloakbrowser';
+
+const browser = await launch();
+const page = await browser.newPage();
+await page.goto('https://protected-site.com');
+console.log(await page.title());
+await browser.close();
+```
+
+### Puppeteer
+
+> **Note:** Playwright is recommended for sites with reCAPTCHA Enterprise. Puppeteer's CDP protocol leaks automation signals that reCAPTCHA Enterprise can detect. This is a known Puppeteer limitation, not specific to CloakBrowser.
+
+```javascript
+import { launch } from 'cloakbrowser/puppeteer';
+
+const browser = await launch();
+const page = await browser.newPage();
+await page.goto('https://protected-site.com');
+console.log(await page.title());
+await browser.close();
+```
+
+### Options
+
+```javascript
+import { launch, launchContext, launchPersistentContext } from 'cloakbrowser';
+
+// With proxy
+const browser = await launch({
+  proxy: 'http://user:pass@proxy:8080',
+});
+
+// With proxy object (bypass, separate auth fields)
+const browser = await launch({
+  proxy: { server: 'http://proxy:8080', bypass: '.google.com', username: 'user', password: 'pass' },
+});
+
+// Headed mode (visible browser window)
+const browser = await launch({ headless: false });
+
+// Extra Chrome args
+const browser = await launch({
+  args: ['--fingerprint=12345'],
+});
+
+// With timezone and locale
+const browser = await launch({
+  timezone: 'America/New_York',
+  locale: 'en-US',
+});
+
+// Auto-detect timezone/locale from proxy IP (requires: npm install mmdb-lib)
+const browser = await launch({
+  proxy: 'http://proxy:8080',
+  geoip: true,
+});
+
+// Browser + context in one call (timezone/locale set via binary flags)
+const context = await launchContext({
+  userAgent: 'Custom UA',
+  viewport: { width: 1920, height: 1080 },
+  locale: 'en-US',
+  timezone: 'America/New_York',
+});
+
+// Persistent profile — stay logged in, bypass incognito detection, load extensions
+const ctx = await launchPersistentContext({
+  userDataDir: './chrome-profile',
+  headless: false,
+  proxy: 'http://user:pass@proxy:8080',
+});
+const page = ctx.pages()[0] || await ctx.newPage();
+await page.goto('https://example.com');
+await ctx.close();  // profile saved — reuse same path to restore state
+```
+
+### Auto Timezone/Locale from Proxy IP
+
+When using a proxy, antibot systems check that your browser's timezone and locale match the proxy's location. Install `mmdb-lib` to enable auto-detection from an offline GeoIP database (~70 MB, downloaded on first use):
+
+```bash
+npm install mmdb-lib
+```
+
+```javascript
+// Auto-detect — timezone and locale set from proxy's IP geolocation
+const browser = await launch({ proxy: 'http://proxy:8080', geoip: true });
+
+// Works with launchContext too
+const context = await launchContext({ proxy: 'http://proxy:8080', geoip: true });
+
+// Explicit values always win over auto-detection
+const browser = await launch({ proxy: 'http://proxy:8080', geoip: true, timezone: 'Europe/London' });
+```
+
+> **Note:** For rotating residential proxies, the DNS-resolved IP may differ from the exit IP. Pass explicit `timezone`/`locale` in those cases.
+
+### CLI
+
+Pre-download the binary or check installation status from the command line:
+
+```bash
+npx cloakbrowser install      # Download binary with progress output
+npx cloakbrowser info         # Show version, path, platform
+npx cloakbrowser update       # Check for and download newer binary
+npx cloakbrowser clear-cache  # Remove cached binaries
+```
+
+### Utilities
+
+```javascript
+import { ensureBinary, clearCache, binaryInfo, checkForUpdate } from 'cloakbrowser';
+
+// Pre-download binary (e.g., during Docker build)
+await ensureBinary();
+
+// Check installation
+console.log(binaryInfo());
+
+// Force re-download
+clearCache();
+
+// Manually check for newer Chromium version
+const newVersion = await checkForUpdate();
+if (newVersion) console.log(`Updated to ${newVersion}`);
+```
+
+## Test Results
+
+| Detection Service | Stock Browser | CloakBrowser |
+|---|---|---|
+| **reCAPTCHA v3** | 0.1 (bot) | **0.9** (human) |
+| **Cloudflare Turnstile** | FAIL | **PASS** |
+| **FingerprintJS** | DETECTED | **PASS** |
+| **BrowserScan** | DETECTED | **NORMAL** (4/4) |
+| **bot.incolumitas.com** | 13 fails | **1 fail** |
+| `navigator.webdriver` | `true` | **`false`** |
+| CDP detection | Detected | **Not detected** |
+| TLS fingerprint | Mismatch | **Identical to Chrome** |
+| | | **Tested against 30+ detection sites** |
+
+## Configuration
+
+| Env Variable | Default | Description |
+|---|---|---|
+| `CLOAKBROWSER_BINARY_PATH` | — | Skip download, use a local Chromium binary |
+| `CLOAKBROWSER_CACHE_DIR` | `~/.cloakbrowser` | Binary cache directory |
+| `CLOAKBROWSER_DOWNLOAD_URL` | `cloakbrowser.dev` | Custom download URL |
+| `CLOAKBROWSER_AUTO_UPDATE` | `true` | Set to `false` to disable background update checks |
+| `CLOAKBROWSER_SKIP_CHECKSUM` | `false` | Set to `true` to skip SHA-256 verification after download |
+
+## Migrate From Playwright
+
+```diff
+- import { chromium } from 'playwright';
+- const browser = await chromium.launch();
++ import { launch } from 'cloakbrowser';
++ const browser = await launch();
+
+const page = await browser.newPage();
+// ... rest of your code works unchanged
+```
+
+## Platforms
+
+| Platform | Chromium | Patches | Status |
+|---|---|---|---|
+| Linux x86_64 | 145 | 33 | ✅ Latest |
+| Linux arm64 (RPi, Graviton) | 145 | 33 | ✅ Latest |
+| macOS arm64 (Apple Silicon) | 145 | 26 | ✅ Latest |
+| macOS x86_64 (Intel) | 145 | 26 | ✅ Latest |
+| Windows x86_64 | 145 | 33 | ✅ Latest |
+
+## Requirements
+
+- Node.js >= 18
+- One of: `playwright-core` >= 1.40 or `puppeteer-core` >= 21
+
+## Troubleshooting
+
+**Site detects incognito / private browsing mode**
+
+By default, `launch()` opens an incognito context. Some sites (like BrowserScan) detect this. Use `launchPersistentContext()` instead — it runs with a real user profile:
+
+```javascript
+import { launchPersistentContext } from 'cloakbrowser';
+
+const ctx = await launchPersistentContext({
+  userDataDir: './my-profile',
+  headless: false,
+});
+```
+
+This also gives you cookie and localStorage persistence across sessions.
+
+**reCAPTCHA v3 scores are low (0.1–0.3)**
+
+Avoid `page.waitForTimeout()` — it sends CDP protocol commands that reCAPTCHA detects. Use native sleep instead:
+
+```javascript
+// Bad — sends CDP commands, reCAPTCHA detects this
+await page.waitForTimeout(3000);
+
+// Good — invisible to the browser
+await new Promise(r => setTimeout(r, 3000));
+```
+
+Other tips for maximizing reCAPTCHA scores:
+- **Use Playwright, not Puppeteer** — Puppeteer sends more CDP protocol traffic that reCAPTCHA detects ([details](#puppeteer))
+- **Use residential proxies** — datacenter IPs are flagged by IP reputation, not browser fingerprint
+- **Spend 15+ seconds on the page** before triggering reCAPTCHA — short visits score lower
+- **Space out requests** — back-to-back `grecaptcha.execute()` calls from the same session get penalized. Wait 30+ seconds between pages with reCAPTCHA
+- **Use a fixed fingerprint seed** (`--fingerprint=12345`) for consistent device identity across sessions
+- **Use `page.type()` instead of `page.fill()`** for form filling — `fill()` sets values directly without keyboard events, which reCAPTCHA's behavioral analysis flags. `type()` with a delay simulates real keystrokes:
+  ```javascript
+  await page.type('#email', 'user@example.com', { delay: 50 });
+  ```
+- **Minimize `page.evaluate()` calls** before the reCAPTCHA check fires — each one sends CDP traffic
+
+**New update broke something? Roll back to the previous version**
+When auto-update downloads a newer binary, the previous version stays in `~/.cloakbrowser/`. Point `CLOAKBROWSER_BINARY_PATH` to the older cached binary:
+```bash
+# Linux
+export CLOAKBROWSER_BINARY_PATH=~/.cloakbrowser/chromium-145.0.7632.159.2/chrome
+
+# macOS
+export CLOAKBROWSER_BINARY_PATH=~/.cloakbrowser/chromium-145.0.7632.109.2/Chromium.app/Contents/MacOS/Chromium
+
+# Windows
+set CLOAKBROWSER_BINARY_PATH=%USERPROFILE%\.cloakbrowser\chromium-145.0.7632.159.7\chrome.exe
+```
+
+## Links
+
+- 🌐 [Website](https://cloakbrowser.dev)
+- 🐛 [Bug reports & feature requests](https://github.com/CloakHQ/CloakBrowser/issues)
+- 📦 [PyPI (Python package)](https://pypi.org/project/cloakbrowser/)
+- 📖 [Full documentation](https://github.com/CloakHQ/CloakBrowser#readme)
+- 📧 Contact: cloakhq@pm.me
+
+## License
+
+- **Wrapper code** (this repository) — MIT. See [LICENSE](https://github.com/CloakHQ/CloakBrowser/blob/main/LICENSE).
+- **CloakBrowser binary** (compiled Chromium) — free to use, no redistribution. See [BINARY-LICENSE.md](https://github.com/CloakHQ/CloakBrowser/blob/main/BINARY-LICENSE.md).
+
+Use against financial, banking, healthcare, or government authentication systems without authorization is expressly prohibited.

js/examples/basic-playwright.ts

@@ -0,0 +1,18 @@
+/**
+ * Basic CloakBrowser example using Playwright API.
+ *
+ * Usage:
+ *   CLOAKBROWSER_BINARY_PATH=/path/to/chrome npx tsx examples/basic-playwright.ts
+ */
+
+import { launch } from "../src/index.js";
+
+const browser = await launch({ headless: true });
+const page = await browser.newPage();
+
+await page.goto("https://example.com");
+console.log(`Title: ${await page.title()}`);
+console.log(`URL: ${page.url()}`);
+
+await browser.close();
+console.log("Done.");

js/examples/basic-puppeteer.ts

@@ -0,0 +1,18 @@
+/**
+ * Basic CloakBrowser example using Puppeteer API.
+ *
+ * Usage:
+ *   CLOAKBROWSER_BINARY_PATH=/path/to/chrome npx tsx examples/basic-puppeteer.ts
+ */
+
+import { launch } from "../src/puppeteer.js";
+
+const browser = await launch({ headless: true });
+const page = await browser.newPage();
+
+await page.goto("https://example.com");
+console.log(`Title: ${await page.title()}`);
+console.log(`URL: ${page.url()}`);
+
+await browser.close();
+console.log("Done.");

js/examples/persistent-context.ts

@@ -0,0 +1,40 @@
+/**
+ * Persistent context example: cookies and localStorage survive across sessions.
+ *
+ * Usage:
+ *   CLOAKBROWSER_BINARY_PATH=/path/to/chrome npx tsx examples/persistent-context.ts
+ */
+
+import { launchPersistentContext } from "../src/index.js";
+
+const PROFILE_DIR = "./my-profile";
+
+// Session 1 — set some state
+console.log("=== Session 1: Setting state ===");
+let ctx = await launchPersistentContext({
+  userDataDir: PROFILE_DIR,
+  headless: false,
+});
+let page = ctx.pages()[0] || (await ctx.newPage());
+await page.goto("https://example.com");
+await page.evaluate(() => {
+  document.cookie = "session=abc123; path=/; max-age=3600";
+  localStorage.setItem("user", "returning");
+});
+console.log(`Cookie: ${await page.evaluate(() => document.cookie)}`);
+console.log(`localStorage: ${await page.evaluate(() => localStorage.getItem("user"))}`);
+await ctx.close();
+
+// Session 2 — state is restored
+console.log("\n=== Session 2: Verifying persistence ===");
+ctx = await launchPersistentContext({
+  userDataDir: PROFILE_DIR,
+  headless: false,
+});
+page = ctx.pages()[0] || (await ctx.newPage());
+await page.goto("https://example.com");
+console.log(`Cookie: ${await page.evaluate(() => document.cookie)}`);
+console.log(`localStorage: ${await page.evaluate(() => localStorage.getItem("user"))}`);
+await ctx.close();
+
+console.log("\nDone!");

js/examples/stagehand.ts

@@ -0,0 +1,36 @@
+/**
+ * Stagehand + CloakBrowser: AI browser automation with stealth fingerprints.
+ *
+ * Stagehand handles AI-powered navigation and actions,
+ * CloakBrowser handles bot detection.
+ *
+ * Requires: npm install @browserbasehq/stagehand cloakbrowser
+ * Set OPENAI_API_KEY for the AI model.
+ *
+ * Usage:
+ *   CLOAKBROWSER_BINARY_PATH=/path/to/chrome npx tsx examples/stagehand.ts
+ */
+
+import { Stagehand } from "@browserbasehq/stagehand";
+import { ensureBinary } from "../src/download.js";
+import { getDefaultStealthArgs } from "../src/config.js";
+
+const binaryPath = await ensureBinary();
+const stealthArgs = getDefaultStealthArgs();
+
+const stagehand = new Stagehand({
+  env: "LOCAL",
+  localBrowserLaunchOptions: {
+    executablePath: binaryPath,
+    args: stealthArgs,
+    headless: true,
+  },
+});
+
+await stagehand.init();
+
+const page = stagehand.context.pages()[0];
+await page.goto("https://example.com");
+console.log(`Stagehand + CloakBrowser: ${await page.title()}`);
+
+await stagehand.close();

js/examples/stealth-test.ts

@@ -0,0 +1,280 @@
+/**
+ * Full stealth test suite — validates CloakBrowser against live detection services.
+ * Mirrors Python examples/stealth_test.py.
+ *
+ * Usage:
+ *   CLOAKBROWSER_BINARY_PATH=/path/to/chrome npx tsx examples/stealth-test.ts
+ *   CLOAKBROWSER_BINARY_PATH=/path/to/chrome npx tsx examples/stealth-test.ts --proxy http://10.50.96.5:8888
+ */
+
+import { launch } from "../src/index.js";
+
+const PROXY = process.argv.includes("--proxy")
+  ? process.argv[process.argv.indexOf("--proxy") + 1]
+  : undefined;
+
+interface TestResult {
+  name: string;
+  status: "PASS" | "FAIL" | "ERROR";
+  verdict: string;
+}
+
+const results: TestResult[] = [];
+
+console.log("=".repeat(60));
+console.log("CloakBrowser JS — Stealth Test Suite");
+console.log("=".repeat(60));
+console.log(`Proxy: ${PROXY || "none"}\n`);
+
+const browser = await launch({ headless: true, proxy: PROXY });
+const page = await browser.newPage();
+
+// ---------------------------------------------------------------------------
+// Test 1: bot.sannysoft.com
+// ---------------------------------------------------------------------------
+async function testSannysoft() {
+  console.log("--- bot.sannysoft.com ---");
+  await page.goto("https://bot.sannysoft.com", {
+    waitUntil: "networkidle",
+    timeout: 30000,
+  });
+  await page.waitForTimeout(3000);
+
+  const result = await page.evaluate(() => {
+    const rows = document.querySelectorAll("table tr");
+    let passed = 0;
+    let total = 0;
+    const failed: string[] = [];
+    rows.forEach((r) => {
+      const cells = r.querySelectorAll("td");
+      if (cells.length >= 2) {
+        total++;
+        const key = cells[0]!.innerText.trim();
+        const cls = cells[1]!.className || "";
+        if (cls.includes("failed")) {
+          failed.push(key);
+        } else {
+          passed++;
+        }
+      }
+    });
+    return { passed, total, failed };
+  });
+
+  const verdict =
+    result.failed.length === 0
+      ? `${result.passed}/${result.total} — ALL GREEN`
+      : `${result.passed}/${result.total} (FAILED: ${result.failed.join(", ")})`;
+  const status = result.failed.length === 0 ? "PASS" : "FAIL";
+  console.log(`Result: [${status}] ${verdict}\n`);
+  results.push({ name: "bot.sannysoft.com", status, verdict });
+}
+
+// ---------------------------------------------------------------------------
+// Test 2: bot.incolumitas.com
+// ---------------------------------------------------------------------------
+async function testIncolumitas() {
+  console.log("--- bot.incolumitas.com ---");
+  await page.goto("https://bot.incolumitas.com", {
+    waitUntil: "networkidle",
+    timeout: 30000,
+  });
+  await page.waitForTimeout(12000); // needs time for all detection tests
+
+  const result = await page.evaluate(() => {
+    const text = document.body.innerText;
+    const okMatches = text.match(/"(\w+)":\s*"OK"/g) || [];
+    const failMatches = text.match(/"(\w+)":\s*"FAIL"/g) || [];
+    const failedTests = failMatches.map((m) => {
+      const match = m.match(/"(\w+)"/);
+      return match ? match[1] : m;
+    });
+    return {
+      passed: okMatches.length,
+      failed: failMatches.length,
+      failedTests,
+      total: okMatches.length + failMatches.length,
+    };
+  });
+
+  const verdict =
+    result.failed === 0
+      ? `${result.passed}/${result.total} — ALL GREEN`
+      : `${result.passed}/${result.total} (FAILED: ${result.failedTests.join(", ")})`;
+  // WEBDRIVER false positive is expected
+  const status = result.failed <= 1 ? "PASS" : "FAIL";
+  console.log(`Result: [${status}] ${verdict}\n`);
+  results.push({ name: "bot.incolumitas.com", status, verdict });
+}
+
+// ---------------------------------------------------------------------------
+// Test 3: BrowserScan
+// ---------------------------------------------------------------------------
+async function testBrowserScan() {
+  console.log("--- BrowserScan ---");
+  await page.goto("https://www.browserscan.net/bot-detection", {
+    waitUntil: "networkidle",
+    timeout: 30000,
+  });
+  await page.waitForTimeout(5000);
+
+  const result = await page.evaluate(() => {
+    const text = document.body.innerText;
+    const normalMatches = text.match(/Normal/g);
+    const abnormalMatches = text.match(/Abnormal/g);
+    return {
+      normal: normalMatches ? normalMatches.length : 0,
+      abnormal: abnormalMatches ? abnormalMatches.length : 0,
+    };
+  });
+
+  const verdict = `Normal: ${result.normal}, Abnormal: ${result.abnormal}`;
+  const status = result.abnormal === 0 ? "PASS" : "FAIL";
+  console.log(`Result: [${status}] ${verdict}\n`);
+  results.push({ name: "BrowserScan", status, verdict });
+}
+
+// ---------------------------------------------------------------------------
+// Test 4: deviceandbrowserinfo.com
+// ---------------------------------------------------------------------------
+async function testDeviceAndBrowserInfo() {
+  console.log("--- deviceandbrowserinfo.com ---");
+  await page.goto("https://deviceandbrowserinfo.com/are_you_a_bot", {
+    waitUntil: "domcontentloaded",
+    timeout: 30000,
+  });
+  await page.waitForTimeout(8000);
+
+  const result = await page.evaluate(() => {
+    const text = document.body.innerText;
+    const botMatch = text.match(/"isBot":\s*(true|false)/);
+    const isBot = botMatch ? botMatch[1] === "true" : null;
+    const checks: Record<string, boolean> = {};
+    const patterns = [
+      "isBot",
+      "hasBotUserAgent",
+      "hasWebdriverTrue",
+      "isHeadlessChrome",
+      "isAutomatedWithCDP",
+      "hasSuspiciousWeakSignals",
+      "isPlaywright",
+      "hasInconsistentChromeObject",
+    ];
+    patterns.forEach((p) => {
+      const match = text.match(new RegExp('"' + p + '":\\s*(true|false)'));
+      if (match) checks[p] = match[1] === "true";
+    });
+    return { isBot, checks };
+  });
+
+  const trueFlags = Object.entries(result.checks)
+    .filter(([, v]) => v)
+    .map(([k]) => k);
+  const verdict =
+    `isBot: ${result.isBot}` +
+    (trueFlags.length > 0 ? ` (flagged: ${trueFlags.join(", ")})` : " — all clear");
+  const status = !result.isBot ? "PASS" : "FAIL";
+  console.log(`Result: [${status}] ${verdict}\n`);
+  results.push({ name: "deviceandbrowserinfo.com", status, verdict });
+}
+
+// ---------------------------------------------------------------------------
+// Test 5: FingerprintJS
+// ---------------------------------------------------------------------------
+async function testFingerprintJS() {
+  console.log("--- FingerprintJS ---");
+  await page.goto("https://demo.fingerprint.com/web-scraping", {
+    waitUntil: "networkidle",
+    timeout: 30000,
+  });
+  await page.waitForTimeout(5000);
+
+  try {
+    await page.click("button:has-text('Search')", { timeout: 5000 });
+    await page.waitForTimeout(5000);
+  } catch {
+    // Search button may not be present
+  }
+
+  const result = await page.evaluate(() => {
+    const text = document.body.innerText;
+    const hasFlights =
+      text.includes("Price per adult") || text.includes("$");
+    const isBlocked =
+      text.includes("request was blocked") ||
+      text.includes("bot visit detected");
+    return { passed: hasFlights && !isBlocked, isBlocked, hasFlights };
+  });
+
+  const verdict = result.passed
+    ? "PASSED (flights shown)"
+    : result.isBlocked
+      ? "BLOCKED"
+      : "NO FLIGHTS";
+  const status = result.passed ? "PASS" : "FAIL";
+  console.log(`Result: [${status}] ${verdict}\n`);
+  results.push({ name: "FingerprintJS", status, verdict });
+}
+
+// ---------------------------------------------------------------------------
+// Test 6: reCAPTCHA v3
+// ---------------------------------------------------------------------------
+async function testRecaptcha() {
+  console.log("--- reCAPTCHA v3 (Google) ---");
+  await page.goto(
+    "https://recaptcha-demo.appspot.com/recaptcha-v3-request-scores.php",
+    { waitUntil: "networkidle", timeout: 30000 }
+  );
+  await page.waitForTimeout(8000);
+
+  const result = await page.evaluate(() => {
+    const text = document.body.innerText;
+    const scoreMatch = text.match(/"score":\s*(\d+\.\d+)/);
+    return {
+      score: scoreMatch ? parseFloat(scoreMatch[1]) : null,
+    };
+  });
+
+  const verdict = `Score: ${result.score ?? "N/A"}`;
+  const status = (result.score ?? 0) >= 0.7 ? "PASS" : "FAIL";
+  console.log(`Result: [${status}] ${verdict}\n`);
+  results.push({ name: "reCAPTCHA v3", status, verdict });
+}
+
+// ---------------------------------------------------------------------------
+// Run all tests
+// ---------------------------------------------------------------------------
+const tests = [
+  testSannysoft,
+  testIncolumitas,
+  testBrowserScan,
+  testDeviceAndBrowserInfo,
+  testFingerprintJS,
+  testRecaptcha,
+];
+
+for (const test of tests) {
+  try {
+    await test();
+  } catch (err) {
+    const name = test.name.replace("test", "");
+    console.log(`Error: ${err}\n`);
+    results.push({ name, status: "ERROR", verdict: String(err) });
+  }
+}
+
+await browser.close();
+
+// Summary
+console.log("=".repeat(60));
+console.log("RESULTS SUMMARY");
+console.log("=".repeat(60));
+for (const r of results) {
+  const icon = { PASS: "+", FAIL: "!", ERROR: "x" }[r.status];
+  console.log(`  [${icon}] ${r.name}: ${r.verdict}`);
+}
+const passedCount = results.filter((r) => r.status === "PASS").length;
+console.log(`\n  ${passedCount}/${results.length} tests passed`);
+console.log("=".repeat(60));
+
+process.exit(passedCount === results.length ? 0 : 1);

js/package.json

@@ -0,0 +1,88 @@
+{
+  "name": "cloakbrowser",
+  "version": "0.3.17",
+  "description": "Stealth Chromium that passes every bot detection test. Drop-in Playwright/Puppeteer replacement with source-level fingerprint patches.",
+  "type": "module",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
+    },
+    "./puppeteer": {
+      "types": "./dist/puppeteer.d.ts",
+      "import": "./dist/puppeteer.js"
+    }
+  },
+  "bin": {
+    "cloakbrowser": "./dist/cli.js"
+  },
+  "files": [
+    "dist"
+  ],
+  "keywords": [
+    "stealth",
+    "browser",
+    "chromium",
+    "playwright",
+    "puppeteer",
+    "scraping",
+    "web-scraping",
+    "anti-detect",
+    "antidetect",
+    "undetected",
+    "bot-detection",
+    "fingerprint",
+    "recaptcha",
+    "cloudflare",
+    "turnstile",
+    "datadome",
+    "captcha",
+    "headless",
+    "automation",
+    "ai-agent"
+  ],
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/CloakHQ/cloakbrowser",
+    "directory": "js"
+  },
+  "homepage": "https://github.com/CloakHQ/cloakbrowser#javascript--nodejs",
+  "engines": {
+    "node": ">=18.0.0"
+  },
+  "peerDependencies": {
+    "mmdb-lib": ">=2.0.0",
+    "playwright-core": ">=1.40.0",
+    "puppeteer-core": ">=21.0.0"
+  },
+  "peerDependenciesMeta": {
+    "playwright-core": {
+      "optional": true
+    },
+    "puppeteer-core": {
+      "optional": true
+    },
+    "mmdb-lib": {
+      "optional": true
+    }
+  },
+  "dependencies": {
+    "tar": "^7.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^20.10.0",
+    "mmdb-lib": "^3.0.2",
+    "playwright-core": "^1.40.0",
+    "puppeteer-core": "^21.0.0",
+    "typescript": "^5.3.0",
+    "vitest": "^1.0.0"
+  },
+  "scripts": {
+    "build": "tsc",
+    "typecheck": "tsc --noEmit",
+    "test": "vitest run"
+  }
+}

js/src/args.ts

@@ -0,0 +1,59 @@
+/**
+ * Shared argument builder for Playwright and Puppeteer wrappers.
+ */
+
+import type { LaunchOptions } from "./types.js";
+import { getDefaultStealthArgs } from "./config.js";
+
+const DEBUG = /\bcloakbrowser\b/.test(process.env.DEBUG ?? "");
+
+/**
+ * Build deduplicated Chromium CLI args from stealth defaults + user overrides.
+ *
+ * Priority: stealth defaults < user args < dedicated params (timezone/locale).
+ */
+export function buildArgs(options: LaunchOptions): string[] {
+  const seen = new Map<string, string>();
+
+  if (options.stealthArgs !== false) {
+    for (const arg of getDefaultStealthArgs()) {
+      seen.set(arg.split("=")[0], arg);
+    }
+  }
+  // GPU blocklist bypass:
+  // - Headed mode (all platforms): Chromium blocks WebGL on software GPUs
+  //   in Docker/Xvfb. Flag lets SwiftShader serve WebGL. See issue #56.
+  // - Windows (all modes): Chromium's GPU blocklist blocks WebGPU for the
+  //   Microsoft Basic Render Driver. Dawn's adapter_blocklist bypass alone
+  //   isn't enough. Linux doesn't need it.
+  if (options.headless === false || process.platform === "win32") {
+    seen.set("--ignore-gpu-blocklist", "--ignore-gpu-blocklist");
+  }
+  if (options.args) {
+    for (const arg of options.args) {
+      const key = arg.split("=")[0];
+      if (seen.has(key)) {
+        if (DEBUG) console.debug(`[cloakbrowser] Arg override: ${seen.get(key)} -> ${arg}`);
+      }
+      seen.set(key, arg);
+    }
+  }
+  if (options.timezone) {
+    const key = "--fingerprint-timezone";
+    const flag = `${key}=${options.timezone}`;
+    if (seen.has(key)) {
+      if (DEBUG) console.debug(`[cloakbrowser] Arg override: ${seen.get(key)} -> ${flag}`);
+    }
+    seen.set(key, flag);
+  }
+  if (options.locale) {
+    for (const k of ["--lang", "--fingerprint-locale"] as const) {
+      const flag = `${k}=${options.locale}`;
+      if (seen.has(k)) {
+        if (DEBUG) console.debug(`[cloakbrowser] Arg override: ${seen.get(k)} -> ${flag}`);
+      }
+      seen.set(k, flag);
+    }
+  }
+  return [...seen.values()];
+}

js/src/cli.ts

@@ -0,0 +1,97 @@
+#!/usr/bin/env node
+/**
+ * CLI for cloakbrowser — download and manage the stealth Chromium binary.
+ *
+ * Usage:
+ *   npx cloakbrowser install      # Download binary (with progress)
+ *   npx cloakbrowser info         # Show binary version, path, platform
+ *   npx cloakbrowser update       # Check for and download newer binary
+ *   npx cloakbrowser clear-cache  # Remove cached binaries
+ */
+
+import { ensureBinary, binaryInfo, checkForUpdate, clearCache } from "./download.js";
+import { getLocalBinaryOverride, getCacheDir } from "./config.js";
+import fs from "node:fs";
+
+const USAGE = `Usage: cloakbrowser <command>
+
+Commands:
+  install      Download the Chromium binary
+  info         Show binary version, path, and platform
+  update       Check for and download a newer binary
+  clear-cache  Remove all cached binaries`;
+
+async function cmdInstall(): Promise<void> {
+  const binaryPath = await ensureBinary();
+  console.log(binaryPath);
+}
+
+function cmdInfo(): void {
+  const info = binaryInfo();
+  const override = getLocalBinaryOverride();
+
+  console.log(`Version:   ${info.version}`);
+  console.log(`Platform:  ${info.platform}`);
+  console.log(`Binary:    ${info.binaryPath}`);
+  console.log(`Installed: ${info.installed}`);
+  console.log(`Cache:     ${info.cacheDir}`);
+  if (override) {
+    console.log(`Override:  ${override} (CLOAKBROWSER_BINARY_PATH)`);
+  }
+}
+
+async function cmdUpdate(): Promise<void> {
+  console.error("Checking for updates...");
+  const newVersion = await checkForUpdate();
+  if (newVersion) {
+    console.log(`Updated to Chromium ${newVersion}`);
+  } else {
+    console.log("Already up to date.");
+  }
+}
+
+function cmdClearCache(): void {
+  const cacheDir = getCacheDir();
+  if (!fs.existsSync(cacheDir)) {
+    console.log("No cache to clear.");
+    return;
+  }
+  clearCache();
+  console.log("Cache cleared.");
+}
+
+async function main(): Promise<void> {
+  const command = process.argv[2];
+
+  if (!command || command === "--help" || command === "-h") {
+    console.log(USAGE);
+    process.exit(command ? 0 : 2);
+  }
+
+  try {
+    switch (command) {
+      case "install":
+        await cmdInstall();
+        break;
+      case "info":
+        cmdInfo();
+        break;
+      case "update":
+        await cmdUpdate();
+        break;
+      case "clear-cache":
+        cmdClearCache();
+        break;
+      default:
+        console.error(`Unknown command: ${command}\n`);
+        console.log(USAGE);
+        process.exit(2);
+    }
+  } catch (err) {
+    const message = err instanceof Error ? err.message : String(err);
+    console.error(`Error: ${message}`);
+    process.exit(1);
+  }
+}
+
+main();

js/src/config.ts

@@ -0,0 +1,237 @@
+/**
+ * Stealth configuration and platform detection for cloakbrowser.
+ * Mirrors Python cloakbrowser/config.py.
+ */
+
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+// Read wrapper version from package.json (single source of truth)
+let WRAPPER_VERSION = "0.0.0";
+try {
+  const _configDir = path.dirname(fileURLToPath(import.meta.url));
+  const _pkgPath = path.resolve(_configDir, "..", "package.json");
+  const _pkg = JSON.parse(fs.readFileSync(_pkgPath, "utf-8")) as { version: string };
+  WRAPPER_VERSION = _pkg.version;
+} catch {
+  // Fallback — package.json not found (bundled or unusual layout).
+  // Wrapper update check will compare against 0.0.0 and always suggest updating.
+}
+export { WRAPPER_VERSION };
+
+// ---------------------------------------------------------------------------
+// Chromium version shipped with this release.
+// Different platforms may ship different versions during transition periods.
+// CHROMIUM_VERSION is the latest across all platforms (for display/reference).
+// Use getChromiumVersion() for the current platform's actual version.
+// ---------------------------------------------------------------------------
+export const CHROMIUM_VERSION = "145.0.7632.159.7";
+
+export const PLATFORM_CHROMIUM_VERSIONS: Record<string, string> = {
+  "linux-x64": "145.0.7632.159.7",
+  "linux-arm64": "145.0.7632.159.7",
+  "darwin-arm64": "145.0.7632.109.2",
+  "darwin-x64": "145.0.7632.109.2",
+  "windows-x64": "145.0.7632.159.7",
+};
+
+// ---------------------------------------------------------------------------
+// Platform detection
+// ---------------------------------------------------------------------------
+const SUPPORTED_PLATFORMS: Record<string, string> = {
+  "linux-x64": "linux-x64",
+  "linux-arm64": "linux-arm64",
+  "darwin-arm64": "darwin-arm64",
+  "darwin-x64": "darwin-x64",
+  "win32-x64": "windows-x64",
+};
+
+// Platforms with pre-built binaries available for download (derived from version map).
+const AVAILABLE_PLATFORMS = new Set(Object.keys(PLATFORM_CHROMIUM_VERSIONS));
+
+export function getChromiumVersion(): string {
+  const tag = getPlatformTag();
+  return PLATFORM_CHROMIUM_VERSIONS[tag] ?? CHROMIUM_VERSION;
+}
+
+export function getPlatformTag(): string {
+  const platform = process.platform;
+  const arch = process.arch;
+
+  // Map Node.js platform/arch to our tag format
+  let key: string;
+  if (platform === "linux" && arch === "x64") key = "linux-x64";
+  else if (platform === "linux" && arch === "arm64") key = "linux-arm64";
+  else if (platform === "darwin" && arch === "arm64") key = "darwin-arm64";
+  else if (platform === "darwin" && arch === "x64") key = "darwin-x64";
+  else if (platform === "win32" && arch === "x64") key = "win32-x64";
+  else {
+    const supported = Object.values(SUPPORTED_PLATFORMS).join(", ");
+    throw new Error(
+      `Unsupported platform: ${platform} ${arch}. Supported: ${supported}`
+    );
+  }
+
+  return SUPPORTED_PLATFORMS[key]!;
+}
+
+// ---------------------------------------------------------------------------
+// Binary cache paths
+// ---------------------------------------------------------------------------
+export function getCacheDir(): string {
+  const custom = process.env.CLOAKBROWSER_CACHE_DIR;
+  if (custom) return custom;
+  return path.join(os.homedir(), ".cloakbrowser");
+}
+
+export function getBinaryDir(version?: string): string {
+  return path.join(getCacheDir(), `chromium-${version || getChromiumVersion()}`);
+}
+
+export function getBinaryPath(version?: string): string {
+  const binaryDir = getBinaryDir(version);
+  if (process.platform === "darwin") {
+    return path.join(binaryDir, "Chromium.app", "Contents", "MacOS", "Chromium");
+  }
+  if (process.platform === "win32") {
+    return path.join(binaryDir, "chrome.exe");
+  }
+  return path.join(binaryDir, "chrome");
+}
+
+export function checkPlatformAvailable(): void {
+  if (getLocalBinaryOverride()) return;
+
+  const tag = getPlatformTag(); // throws if unsupported entirely
+  if (!AVAILABLE_PLATFORMS.has(tag)) {
+    const available = [...AVAILABLE_PLATFORMS].sort().join(", ");
+    throw new Error(
+      `CloakBrowser — Pre-built binaries are currently only available for: ${available}.\n\n` +
+        `To use CloakBrowser now, set CLOAKBROWSER_BINARY_PATH to a local Chromium binary.`
+    );
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Download URL
+// ---------------------------------------------------------------------------
+export const DOWNLOAD_BASE_URL =
+  process.env.CLOAKBROWSER_DOWNLOAD_URL ||
+  "https://cloakbrowser.dev";
+
+export const GITHUB_API_URL =
+  "https://api.github.com/repos/CloakHQ/cloakbrowser/releases";
+
+export const GITHUB_DOWNLOAD_BASE_URL =
+  "https://github.com/CloakHQ/cloakbrowser/releases/download";
+
+export function getArchiveExt(): string {
+  return process.platform === "win32" ? ".zip" : ".tar.gz";
+}
+
+export function getArchiveName(tag?: string): string {
+  return `cloakbrowser-${tag || getPlatformTag()}${getArchiveExt()}`;
+}
+
+export function getDownloadUrl(version?: string): string {
+  const v = version || getChromiumVersion();
+  return `${DOWNLOAD_BASE_URL}/chromium-v${v}/${getArchiveName()}`;
+}
+
+export function getFallbackDownloadUrl(version?: string): string {
+  const v = version || getChromiumVersion();
+  return `${GITHUB_DOWNLOAD_BASE_URL}/chromium-v${v}/${getArchiveName()}`;
+}
+
+export function getEffectiveVersion(): string {
+  const base = getChromiumVersion();
+  const cacheDir = getCacheDir();
+  // Try platform-scoped marker first, fall back to legacy marker for upgrades from <0.3.0
+  for (const name of [`latest_version_${getPlatformTag()}`, "latest_version"]) {
+    const marker = path.join(cacheDir, name);
+    try {
+      if (fs.existsSync(marker)) {
+        const version = fs.readFileSync(marker, "utf-8").trim();
+        if (version && versionNewer(version, base)) {
+          const binary = getBinaryPath(version);
+          if (fs.existsSync(binary)) {
+            return version;
+          }
+        }
+      }
+    } catch {
+      // Marker unreadable — try next
+    }
+  }
+  return base;
+}
+
+export function parseVersion(v: string): number[] {
+  return v.split(".").map(Number);
+}
+
+export function versionNewer(a: string, b: string): boolean {
+  const va = parseVersion(a);
+  const vb = parseVersion(b);
+  for (let i = 0; i < Math.max(va.length, vb.length); i++) {
+    if ((va[i] ?? 0) > (vb[i] ?? 0)) return true;
+    if ((va[i] ?? 0) < (vb[i] ?? 0)) return false;
+  }
+  return false;
+}
+
+// ---------------------------------------------------------------------------
+// Local binary override
+// ---------------------------------------------------------------------------
+export function getLocalBinaryOverride(): string | undefined {
+  return process.env.CLOAKBROWSER_BINARY_PATH || undefined;
+}
+
+// ---------------------------------------------------------------------------
+// Playwright default args to suppress — these leak automation signals.
+// --enable-automation: exposes navigator.webdriver = true
+// --enable-unsafe-swiftshader: forces software WebGL rendering via SwiftShader,
+//   producing a distinctive renderer string that no real user browser has
+// ---------------------------------------------------------------------------
+export const IGNORE_DEFAULT_ARGS = ["--enable-automation", "--enable-unsafe-swiftshader"];
+
+// ---------------------------------------------------------------------------
+// Default stealth arguments
+// ---------------------------------------------------------------------------
+// Default viewport — realistic maximized Chrome on 1080p Windows
+// screen=1920x1080, availHeight=1032 (minus 48px taskbar, binary default),
+// innerHeight=947 (minus ~85px Chrome UI: tabs + address bar + bookmarks)
+export const DEFAULT_VIEWPORT = { width: 1920, height: 947 };
+
+export function getDefaultStealthArgs(): string[] {
+  const seed = Math.floor(Math.random() * 90000) + 10000; // 10000-99999
+  const isMac = process.platform === "darwin";
+
+  const base = [
+    "--no-sandbox",
+    "--disable-blink-features=AutomationControlled",
+    `--fingerprint=${seed}`,
+  ];
+
+  if (isMac) {
+    // macOS: run as native Mac browser — GPU/UA match natively
+    return [
+      ...base,
+      "--fingerprint-platform=macos",
+      "--fingerprint-gpu-vendor=Google Inc. (Apple)",
+      "--fingerprint-gpu-renderer=ANGLE (Apple, ANGLE Metal Renderer: Apple M3, Unspecified Version)",
+    ];
+  }
+
+  // Linux/Windows: spoof as Windows desktop
+  // Hardware concurrency, device memory, screen, and window size are
+  // auto-generated by the binary from the seed (v14+).
+  return [
+    ...base,
+    "--fingerprint-platform=windows",
+    "--fingerprint-gpu-vendor=Google Inc. (NVIDIA)",
+    "--fingerprint-gpu-renderer=ANGLE (NVIDIA, NVIDIA GeForce RTX 3070 (0x00002484) Direct3D11 vs_5_0 ps_5_0, D3D11)",
+  ];
+}

js/src/download.ts

@@ -0,0 +1,612 @@
+/**
+ * Binary download and cache management for cloakbrowser.
+ * Downloads the patched Chromium binary on first use, caches it locally.
+ * Mirrors Python cloakbrowser/download.py.
+ */
+
+import { execFileSync } from "node:child_process";
+import { createHash } from "node:crypto";
+import fs from "node:fs";
+import path from "node:path";
+import { pipeline } from "node:stream/promises";
+import { createWriteStream } from "node:fs";
+import { extract as tarExtract } from "tar";
+
+import type { BinaryInfo } from "./types.js";
+import {
+  DOWNLOAD_BASE_URL,
+  GITHUB_API_URL,
+  GITHUB_DOWNLOAD_BASE_URL,
+  WRAPPER_VERSION,
+  checkPlatformAvailable,
+  getArchiveExt,
+  getArchiveName,
+  getBinaryDir,
+  getBinaryPath,
+  getCacheDir,
+  getChromiumVersion,
+  getDownloadUrl,
+  getEffectiveVersion,
+  getFallbackDownloadUrl,
+  getLocalBinaryOverride,
+  getPlatformTag,
+  versionNewer,
+} from "./config.js";
+
+const DOWNLOAD_TIMEOUT_MS = 600_000; // 10 minutes
+const UPDATE_CHECK_INTERVAL_MS = 3_600_000; // 1 hour
+
+// ---------------------------------------------------------------------------
+// Public API
+// ---------------------------------------------------------------------------
+
+/**
+ * Ensure the stealth Chromium binary is available. Download if needed.
+ * Returns the path to the chrome executable.
+ */
+export async function ensureBinary(): Promise<string> {
+  // Check for local override
+  const localOverride = getLocalBinaryOverride();
+  if (localOverride) {
+    if (!fs.existsSync(localOverride)) {
+      throw new Error(
+        `CLOAKBROWSER_BINARY_PATH set to '${localOverride}' but file does not exist`
+      );
+    }
+    console.log(`[cloakbrowser] Using local binary override: ${localOverride}`);
+    return localOverride;
+  }
+
+  // Fail fast if no binary available for this platform
+  checkPlatformAvailable();
+
+  // Check for auto-updated version first, then fall back to hardcoded
+  const effective = getEffectiveVersion();
+  const binaryPath = getBinaryPath(effective);
+
+  if (fs.existsSync(binaryPath) && isExecutable(binaryPath)) {
+    showWelcome();
+    maybeTriggerUpdateCheck();
+    return binaryPath;
+  }
+
+  // Fall back to platform's hardcoded version if effective version binary doesn't exist
+  const platformVersion = getChromiumVersion();
+  if (effective !== platformVersion) {
+    const fallbackPath = getBinaryPath();
+    if (fs.existsSync(fallbackPath) && isExecutable(fallbackPath)) {
+      maybeTriggerUpdateCheck();
+      return fallbackPath;
+    }
+  }
+
+  // Download platform's hardcoded version
+  console.log(
+    `[cloakbrowser] Stealth Chromium ${platformVersion} not found. Downloading for ${getPlatformTag()}...`
+  );
+  await downloadAndExtract();
+
+  const downloadedPath = getBinaryPath();
+  if (!fs.existsSync(downloadedPath)) {
+    throw new Error(
+      `Download completed but binary not found at expected path: ${downloadedPath}. ` +
+      `This may indicate a packaging issue. Please report at ` +
+      `https://github.com/CloakHQ/cloakbrowser/issues`
+    );
+  }
+
+  maybeTriggerUpdateCheck();
+  return downloadedPath;
+}
+
+/** Remove all cached binaries. Forces re-download on next launch. */
+export function clearCache(): void {
+  const cacheDir = getCacheDir();
+  if (fs.existsSync(cacheDir)) {
+    fs.rmSync(cacheDir, { recursive: true, force: true });
+    console.log(`[cloakbrowser] Cache cleared: ${cacheDir}`);
+  }
+}
+
+/** Return info about the current binary installation. */
+export function binaryInfo(): BinaryInfo {
+  const effective = getEffectiveVersion();
+  const binaryPath = getBinaryPath(effective);
+  return {
+    version: effective,
+    platform: getPlatformTag(),
+    binaryPath,
+    installed: fs.existsSync(binaryPath),
+    cacheDir: getBinaryDir(effective),
+    downloadUrl: getDownloadUrl(effective),
+  };
+}
+
+/** Manually check for a newer Chromium version. Returns new version or null. */
+export async function checkForUpdate(): Promise<string | null> {
+  const latest = await getLatestChromiumVersion();
+  if (!latest || !versionNewer(latest, getChromiumVersion())) return null;
+
+  const binaryDir = getBinaryDir(latest);
+  if (fs.existsSync(binaryDir)) {
+    writeVersionMarker(latest);
+    return latest;
+  }
+
+  console.log(`[cloakbrowser] Downloading Chromium ${latest}...`);
+  await downloadAndExtract(latest);
+  writeVersionMarker(latest);
+  return latest;
+}
+
+// ---------------------------------------------------------------------------
+// Welcome message (shown once per install)
+// ---------------------------------------------------------------------------
+
+function showWelcome(): void {
+  const marker = path.join(getCacheDir(), ".welcome_shown");
+  if (fs.existsSync(marker)) return;
+  console.log();
+  console.log("  CloakBrowser — stealth Chromium for automation");
+  console.log("  https://github.com/CloakHQ/CloakBrowser");
+  console.log();
+  console.log("  Issues?  https://github.com/CloakHQ/CloakBrowser/issues");
+  console.log("  Donate?  https://ko-fi.com/cloakhq");
+  console.log("  Star us if CloakBrowser helps your project!");
+  console.log();
+  try {
+    fs.mkdirSync(getCacheDir(), { recursive: true });
+    fs.writeFileSync(marker, "");
+  } catch {
+    // Non-fatal
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Internal helpers
+// ---------------------------------------------------------------------------
+
+async function downloadAndExtract(version?: string): Promise<void> {
+  const primaryUrl = getDownloadUrl(version);
+  const fallbackUrl = getFallbackDownloadUrl(version);
+  const binaryDir = getBinaryDir(version);
+  const binaryPath = getBinaryPath(version);
+
+  // Create cache dir
+  fs.mkdirSync(path.dirname(binaryDir), { recursive: true });
+
+  // Download to temp file (atomic — no partial downloads in cache)
+  const tmpPath = path.join(
+    path.dirname(binaryDir),
+    `_download_${Date.now()}${getArchiveExt()}`
+  );
+
+  try {
+    // Try primary server, fall back to GitHub Releases (skip fallback if custom URL)
+    try {
+      await downloadFile(primaryUrl, tmpPath);
+    } catch (primaryErr) {
+      if (process.env.CLOAKBROWSER_DOWNLOAD_URL) {
+        throw primaryErr;
+      }
+      console.warn(
+        `[cloakbrowser] Primary download failed (${primaryErr instanceof Error ? primaryErr.message : primaryErr}), trying GitHub Releases...`
+      );
+      await downloadFile(fallbackUrl, tmpPath);
+    }
+
+    // Verify checksum before extraction
+    if (process.env.CLOAKBROWSER_SKIP_CHECKSUM?.toLowerCase() !== "true") {
+      await verifyDownloadChecksum(tmpPath, version);
+    }
+
+    await extractArchive(tmpPath, binaryDir, binaryPath);
+    showWelcome();
+  } finally {
+    // Clean up temp file
+    if (fs.existsSync(tmpPath)) {
+      fs.unlinkSync(tmpPath);
+    }
+  }
+}
+
+async function verifyDownloadChecksum(filePath: string, version?: string): Promise<void> {
+  const checksums = await fetchChecksums(version);
+  const tarballName = getArchiveName();
+
+  if (!checksums) {
+    console.warn("[cloakbrowser] SHA256SUMS not available for this release — skipping checksum verification");
+    return;
+  }
+
+  const expected = checksums.get(tarballName);
+  if (!expected) {
+    console.warn(`[cloakbrowser] SHA256SUMS found but no entry for ${tarballName} — skipping verification`);
+    return;
+  }
+
+  await verifyChecksum(filePath, expected);
+}
+
+/** @internal Exported for testing only. */
+export async function fetchChecksums(version?: string): Promise<Map<string, string> | null> {
+  const v = version || getChromiumVersion();
+  const hasCustomUrl = !!process.env.CLOAKBROWSER_DOWNLOAD_URL;
+
+  // Respect custom URL contract — no GitHub fallback when custom URL is set
+  const urls = [`${DOWNLOAD_BASE_URL}/chromium-v${v}/SHA256SUMS`];
+  if (!hasCustomUrl) {
+    urls.push(`${GITHUB_DOWNLOAD_BASE_URL}/chromium-v${v}/SHA256SUMS`);
+  }
+
+  for (const url of urls) {
+    try {
+      const resp = await fetch(url, {
+        redirect: "follow",
+        signal: AbortSignal.timeout(10_000),
+      });
+      if (!resp.ok) continue;
+      return parseChecksums(await resp.text());
+    } catch {
+      continue;
+    }
+  }
+  return null;
+}
+
+/** @internal Exported for testing only. */
+export function parseChecksums(text: string): Map<string, string> {
+  const result = new Map<string, string>();
+  for (const line of text.trim().split("\n")) {
+    const trimmed = line.trim();
+    if (!trimmed) continue;
+    const match = trimmed.match(/^([a-f0-9]{64})\s+\*?(.+)$/i);
+    if (match) {
+      result.set(match[2]!, match[1]!.toLowerCase());
+    }
+  }
+  return result;
+}
+
+async function verifyChecksum(filePath: string, expectedHash: string): Promise<void> {
+  const hash = createHash("sha256");
+  const stream = fs.createReadStream(filePath);
+  for await (const chunk of stream) {
+    hash.update(chunk);
+  }
+  const actual = hash.digest("hex").toLowerCase();
+  if (actual !== expectedHash) {
+    throw new Error(
+      `Checksum verification failed!\n` +
+      `  Expected: ${expectedHash}\n` +
+      `  Got:      ${actual}\n` +
+      `  File may be corrupted or tampered with. ` +
+      `Please retry or report at https://github.com/CloakHQ/cloakbrowser/issues`
+    );
+  }
+  console.log("[cloakbrowser] Checksum verified: SHA-256 OK");
+}
+
+async function downloadFile(url: string, dest: string): Promise<void> {
+  console.log(`[cloakbrowser] Downloading from ${url}`);
+
+  const controller = new AbortController();
+  const timeout = setTimeout(() => controller.abort(), DOWNLOAD_TIMEOUT_MS);
+
+  // Create file stream early so we can ensure cleanup on error
+  const fileStream = createWriteStream(dest);
+
+  try {
+    const response = await fetch(url, {
+      signal: controller.signal,
+      redirect: "follow",
+    });
+
+    if (!response.ok) {
+      throw new Error(`Download failed: HTTP ${response.status} ${response.statusText}`);
+    }
+
+    if (!response.body) {
+      throw new Error("Download failed: empty response body");
+    }
+
+    const total = Number(response.headers.get("content-length") || 0);
+    let downloaded = 0;
+    let lastLoggedPct = -1;
+
+    const reader = response.body.getReader();
+
+    // Stream chunks to file with progress logging
+    while (true) {
+      const { done, value } = await reader.read();
+      if (done) break;
+
+      fileStream.write(value);
+      downloaded += value.length;
+
+      if (total > 0) {
+        const pct = Math.floor((downloaded / total) * 100);
+        if (pct >= lastLoggedPct + 10) {
+          lastLoggedPct = pct;
+          const dlMB = Math.floor(downloaded / (1024 * 1024));
+          const totalMB = Math.floor(total / (1024 * 1024));
+          console.log(
+            `[cloakbrowser] Download progress: ${pct}% (${dlMB}/${totalMB} MB)`
+          );
+        }
+      }
+    }
+
+    // Wait for file stream to fully close (not just finish)
+    await new Promise<void>((resolve, reject) => {
+      fileStream.end();
+      fileStream.on("close", () => resolve());
+      fileStream.on("error", reject);
+    });
+
+    const sizeMB = Math.floor(fs.statSync(dest).size / (1024 * 1024));
+    console.log(`[cloakbrowser] Download complete: ${sizeMB} MB`);
+  } catch (err) {
+    // Ensure file stream is destroyed on error to release the handle
+    if (!fileStream.destroyed) {
+      await new Promise<void>((resolve) => {
+        fileStream.destroy();
+        fileStream.on("close", () => resolve());
+        // Safety timeout in case close never fires
+        setTimeout(resolve, 2000);
+      });
+    }
+    throw err;
+  } finally {
+    clearTimeout(timeout);
+  }
+}
+
+
+async function extractArchive(
+  archivePath: string,
+  destDir: string,
+  binaryPath?: string
+): Promise<void> {
+  console.log(`[cloakbrowser] Extracting to ${destDir}`);
+
+  // Clean existing dir if partial download existed
+  if (fs.existsSync(destDir)) {
+    fs.rmSync(destDir, { recursive: true, force: true });
+  }
+  fs.mkdirSync(destDir, { recursive: true });
+
+  if (archivePath.endsWith(".zip")) {
+    await extractZip(archivePath, destDir);
+  } else {
+    await extractTar(archivePath, destDir);
+  }
+
+  // Flatten single subdirectory if needed
+  flattenSingleSubdir(destDir);
+
+  // Make binary executable (skip on Windows — no-op / AV lock risk)
+  const bp = binaryPath || getBinaryPath();
+  if (process.platform !== "win32" && fs.existsSync(bp)) {
+    fs.chmodSync(bp, 0o755);
+  }
+
+  // macOS: remove quarantine/provenance xattrs to prevent Gatekeeper prompts
+  if (process.platform === "darwin") {
+    removeQuarantine(destDir);
+  }
+
+  if (fs.existsSync(bp)) {
+    console.log(`[cloakbrowser] Binary ready: ${bp}`);
+  }
+}
+
+async function extractTar(archivePath: string, destDir: string): Promise<void> {
+  await tarExtract({
+    file: archivePath,
+    cwd: destDir,
+    strip: 0,
+    filter: (entryPath: string) => {
+      if (path.isAbsolute(entryPath) || entryPath.includes("..")) {
+        console.warn(
+          `[cloakbrowser] Skipping suspicious archive entry: ${entryPath}`
+        );
+        return false;
+      }
+      return true;
+    },
+  });
+}
+
+async function extractZip(archivePath: string, destDir: string): Promise<void> {
+  // Brief delay to ensure OS fully releases file handles (Windows)
+  await new Promise(resolve => setTimeout(resolve, 500));
+
+  if (process.platform === "win32") {
+    // PowerShell 5.1's Expand-Archive uses .NET FileStream which can conflict
+    // with recently-closed Node.js file handles. Use ZipFile API directly.
+    execFileSync("powershell", [
+      "-NoProfile", "-Command",
+      `Add-Type -AssemblyName System.IO.Compression.FileSystem; ` +
+      `[System.IO.Compression.ZipFile]::ExtractToDirectory('${archivePath}', '${destDir}')`,
+    ], { timeout: 120_000 });
+  } else {
+    execFileSync("unzip", ["-o", archivePath, "-d", destDir], { timeout: 120_000 });
+  }
+}
+
+/**
+ * If extraction created a single subdirectory, move its contents up.
+ * Many tarballs wrap files in a top-level directory.
+ */
+function flattenSingleSubdir(destDir: string): void {
+  const entries = fs.readdirSync(destDir);
+  if (entries.length === 1) {
+    const subdir = path.join(destDir, entries[0]!);
+    // Never flatten .app bundles — macOS needs the bundle structure
+    if (entries[0]!.endsWith(".app")) return;
+    if (fs.statSync(subdir).isDirectory()) {
+      const children = fs.readdirSync(subdir);
+      for (const child of children) {
+        fs.renameSync(
+          path.join(subdir, child),
+          path.join(destDir, child)
+        );
+      }
+      fs.rmdirSync(subdir);
+    }
+  }
+}
+
+/** Remove macOS quarantine/provenance xattrs so Gatekeeper doesn't block the binary. */
+function removeQuarantine(dirPath: string): void {
+  try {
+    execFileSync("xattr", ["-cr", dirPath], { timeout: 30_000 });
+  } catch {
+    // Non-fatal — user can manually run: xattr -cr ~/.cloakbrowser/
+  }
+}
+
+function isExecutable(filePath: string): boolean {
+  try {
+    fs.accessSync(filePath, fs.constants.X_OK);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Auto-update
+// ---------------------------------------------------------------------------
+
+function shouldCheckForUpdate(): boolean {
+  if (process.env.CLOAKBROWSER_AUTO_UPDATE?.toLowerCase() === "false")
+    return false;
+  if (getLocalBinaryOverride()) return false;
+  if (process.env.CLOAKBROWSER_DOWNLOAD_URL) return false;
+
+  const checkFile = path.join(getCacheDir(), ".last_update_check");
+  try {
+    const lastCheck = Number(fs.readFileSync(checkFile, "utf-8").trim());
+    if (Date.now() - lastCheck < UPDATE_CHECK_INTERVAL_MS) return false;
+  } catch {
+    /* file doesn't exist or unreadable */
+  }
+  return true;
+}
+
+/** @internal Exported for testing only. */
+export async function getLatestChromiumVersion(): Promise<string | null> {
+  try {
+    const resp = await fetch(`${GITHUB_API_URL}?per_page=10`, {
+      signal: AbortSignal.timeout(10_000),
+    });
+    if (!resp.ok) return null;
+    const releases = (await resp.json()) as Array<{
+      tag_name: string;
+      draft: boolean;
+      assets: Array<{ name: string }>;
+    }>;
+    const platformTarball = getArchiveName();
+    for (const release of releases) {
+      if (release.tag_name.startsWith("chromium-v") && !release.draft) {
+        const assetNames = new Set(
+          (release.assets ?? []).map((a) => a.name)
+        );
+        if (assetNames.has(platformTarball)) {
+          return release.tag_name.replace(/^chromium-v/, "");
+        }
+      }
+    }
+    return null;
+  } catch {
+    return null;
+  }
+}
+
+function writeVersionMarker(version: string): void {
+  const cacheDir = getCacheDir();
+  fs.mkdirSync(cacheDir, { recursive: true });
+  const marker = path.join(cacheDir, `latest_version_${getPlatformTag()}`);
+  const tmp = `${marker}.tmp`;
+  fs.writeFileSync(tmp, version);
+  fs.renameSync(tmp, marker);
+}
+
+let wrapperUpdateChecked = false;
+
+/** @internal Exported for testing only. */
+export function resetWrapperUpdateChecked(): void {
+  wrapperUpdateChecked = false;
+}
+
+/** @internal Exported for testing only. */
+export async function checkWrapperUpdate(): Promise<void> {
+  if (wrapperUpdateChecked) return;
+  wrapperUpdateChecked = true;
+  if (process.env.CLOAKBROWSER_AUTO_UPDATE?.toLowerCase() === "false") return;
+  if (process.env.CLOAKBROWSER_DOWNLOAD_URL) return;
+  try {
+    const resp = await fetch("https://registry.npmjs.org/cloakbrowser/latest", {
+      signal: AbortSignal.timeout(5_000),
+    });
+    if (!resp.ok) return;
+    const data = (await resp.json()) as { version: string };
+    if (data.version && versionNewer(data.version, WRAPPER_VERSION)) {
+      console.warn(
+        `[cloakbrowser] Update available: ${WRAPPER_VERSION} → ${data.version}. ` +
+        `Run: npm install cloakbrowser@latest`
+      );
+    }
+  } catch {
+    // Non-fatal — never block binary update check
+  }
+}
+
+async function checkAndDownloadUpdate(): Promise<void> {
+  try {
+    // Record check timestamp first (rate limiting)
+    const cacheDir = getCacheDir();
+    fs.mkdirSync(cacheDir, { recursive: true });
+    fs.writeFileSync(
+      path.join(cacheDir, ".last_update_check"),
+      String(Date.now())
+    );
+
+    const platformVersion = getChromiumVersion();
+    const latest = await getLatestChromiumVersion();
+    if (!latest || !versionNewer(latest, platformVersion)) return;
+
+    // Already downloaded?
+    if (fs.existsSync(getBinaryDir(latest))) {
+      writeVersionMarker(latest);
+      return;
+    }
+
+    console.log(
+      `[cloakbrowser] Newer Chromium available: ${latest} (current: ${platformVersion}). Downloading in background...`
+    );
+    await downloadAndExtract(latest);
+    writeVersionMarker(latest);
+    console.log(
+      `[cloakbrowser] Background update complete: Chromium ${latest} ready. Will use on next launch.`
+    );
+  } catch (err) {
+    // Background update failed — don't disrupt the user
+    if (process.env.DEBUG) {
+      console.error("[cloakbrowser] Background update failed:", err);
+    }
+  }
+}
+
+function maybeTriggerUpdateCheck(): void {
+  // Wrapper update: once per process, not rate-limited
+  if (!wrapperUpdateChecked) {
+    checkWrapperUpdate().catch(() => { });
+  }
+
+  // Binary update: rate-limited to once per hour
+  if (!shouldCheckForUpdate()) return;
+  checkAndDownloadUpdate().catch(() => { });
+}

js/src/geoip.ts

@@ -0,0 +1,284 @@
+/**
+ * GeoIP-based timezone and locale detection from proxy IP.
+ *
+ * Optional feature — requires `mmdb-lib` package:
+ *   npm install mmdb-lib
+ *
+ * Downloads GeoLite2-City.mmdb (~70 MB) on first use,
+ * caches in `~/.cloakbrowser/geoip/`.
+ */
+
+import fs from "node:fs";
+import path from "node:path";
+import { createWriteStream } from "node:fs";
+import dns from "node:dns/promises";
+import net from "node:net";
+import { getCacheDir } from "./config.js";
+import type { LaunchOptions } from "./types.js";
+import { ensureProxyScheme } from "./proxy.js";
+
+// P3TERX mirror of MaxMind GeoLite2-City — no license key needed
+const GEOIP_DB_URL =
+  "https://github.com/P3TERX/GeoLite.mmdb/raw/download/GeoLite2-City.mmdb";
+const GEOIP_DB_FILENAME = "GeoLite2-City.mmdb";
+const GEOIP_UPDATE_INTERVAL_MS = 30 * 86_400_000; // 30 days
+
+/** Country ISO code → BCP 47 locale (covers ~90% of proxy traffic). */
+export const COUNTRY_LOCALE_MAP: Record<string, string> = {
+  US: "en-US", GB: "en-GB", AU: "en-AU", CA: "en-CA", NZ: "en-NZ",
+  IE: "en-IE", ZA: "en-ZA", SG: "en-SG",
+  DE: "de-DE", AT: "de-AT", CH: "de-CH",
+  FR: "fr-FR", BE: "fr-BE",
+  ES: "es-ES", MX: "es-MX", AR: "es-AR", CO: "es-CO", CL: "es-CL",
+  BR: "pt-BR", PT: "pt-PT",
+  IT: "it-IT", NL: "nl-NL",
+  JP: "ja-JP", KR: "ko-KR", CN: "zh-CN", TW: "zh-TW", HK: "zh-HK",
+  RU: "ru-RU", UA: "uk-UA", PL: "pl-PL", CZ: "cs-CZ", RO: "ro-RO",
+  IL: "he-IL", TR: "tr-TR", SA: "ar-SA", AE: "ar-AE", EG: "ar-EG",
+  IN: "hi-IN", ID: "id-ID", PH: "en-PH",
+  TH: "th-TH", VN: "vi-VN", MY: "ms-MY",
+  SE: "sv-SE", NO: "nb-NO", DK: "da-DK", FI: "fi-FI",
+  GR: "el-GR", HU: "hu-HU", BG: "bg-BG",
+};
+
+export interface GeoResult {
+  timezone: string | null;
+  locale: string | null;
+}
+
+/**
+ * Resolve timezone and locale from a proxy's IP address.
+ * Returns `{ timezone, locale }` — either may be null on failure.
+ * Never throws.
+ */
+export async function resolveProxyGeo(
+  proxyUrl: string
+): Promise<GeoResult> {
+  let Reader: any;
+  try {
+    const mmdb = await import("mmdb-lib");
+    Reader = mmdb.default?.Reader ?? mmdb.Reader;
+  } catch {
+    throw new Error(
+      "mmdb-lib is required for geoip: true. Install it with:\n  npm install mmdb-lib"
+    );
+  }
+
+  const dbPath = await ensureGeoipDb();
+  if (!dbPath) return { timezone: null, locale: null };
+
+  // Exit IP (through proxy) is most accurate — gateway DNS may differ from exit
+  let ip = await resolveExitIp(proxyUrl);
+  if (!ip) ip = await resolveProxyIp(proxyUrl);
+  if (!ip) return { timezone: null, locale: null };
+
+  try {
+    const buf = fs.readFileSync(dbPath);
+    const reader = new Reader(buf);
+    const result = reader.get(ip) as any;
+    const timezone: string | null = result?.location?.time_zone ?? null;
+    const countryCode: string | null = result?.country?.iso_code ?? null;
+    const locale =
+      countryCode ? (COUNTRY_LOCALE_MAP[countryCode] ?? null) : null;
+    return { timezone, locale };
+  } catch {
+    return { timezone: null, locale: null };
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Proxy IP resolution
+// ---------------------------------------------------------------------------
+
+/** @internal Exported for testing. */
+export async function resolveProxyIp(
+  proxyUrl: string
+): Promise<string | null> {
+  try {
+    const url = new URL(proxyUrl);
+    const hostname = url.hostname;
+    if (!hostname) return null;
+
+    // Already a literal IP?
+    if (net.isIP(hostname)) return hostname;
+
+    // DNS resolve
+    const { address } = await dns.lookup(hostname);
+    return address;
+  } catch {
+    return null;
+  }
+}
+
+function isPrivateIp(ip: string): boolean {
+  // Quick check for common private ranges
+  if (ip.startsWith("10.") || ip.startsWith("127.") || ip === "::1") return true;
+  if (ip.startsWith("172.")) {
+    const second = parseInt(ip.split(".")[1], 10);
+    if (second >= 16 && second <= 31) return true;
+  }
+  if (ip.startsWith("192.168.")) return true;
+  return false;
+}
+
+const IP_ECHO_URLS = [
+  "https://api.ipify.org",
+  "https://checkip.amazonaws.com",
+  "https://ifconfig.me/ip",
+];
+
+async function resolveExitIp(proxyUrl: string): Promise<string | null> {
+  // Node.js fetch doesn't support proxy natively — use a CONNECT tunnel via http
+  // For simplicity, use a direct HTTP request to a plain-text IP echo service
+  // through the proxy using Node's http module
+  try {
+    const { default: http } = await import("node:http");
+    const { default: https } = await import("node:https");
+    const proxyUrlObj = new URL(proxyUrl);
+
+    for (const echoUrl of IP_ECHO_URLS) {
+      try {
+        const ip = await new Promise<string | null>((resolve, reject) => {
+          const targetUrl = new URL(echoUrl);
+          const connectReq = http.request({
+            host: proxyUrlObj.hostname,
+            port: parseInt(proxyUrlObj.port || "80", 10),
+            method: "CONNECT",
+            path: `${targetUrl.hostname}:443`,
+            headers: proxyUrlObj.username
+              ? {
+                  "Proxy-Authorization":
+                    "Basic " +
+                    Buffer.from(
+                      `${decodeURIComponent(proxyUrlObj.username)}:${decodeURIComponent(proxyUrlObj.password || "")}`
+                    ).toString("base64"),
+                }
+              : {},
+            timeout: 10_000,
+          });
+
+          connectReq.on("connect", (_res, socket) => {
+            const req = https.request(
+              echoUrl,
+              { socket, timeout: 5_000 } as any,
+              (res) => {
+                let data = "";
+                res.on("data", (chunk: Buffer) => (data += chunk.toString()));
+                res.on("end", () => {
+                  const ip = data.trim();
+                  resolve(net.isIP(ip) ? ip : null);
+                });
+              }
+            );
+            req.on("error", () => resolve(null));
+            req.end();
+          });
+
+          connectReq.on("error", () => resolve(null));
+          connectReq.on("timeout", () => {
+            connectReq.destroy();
+            resolve(null);
+          });
+          connectReq.end();
+        });
+
+        if (ip) return ip;
+      } catch {
+        continue;
+      }
+    }
+  } catch {
+    // Fallback: couldn't import http modules
+  }
+  return null;
+}
+
+// ---------------------------------------------------------------------------
+// GeoIP database management
+// ---------------------------------------------------------------------------
+
+function getGeoipDir(): string {
+  return path.join(getCacheDir(), "geoip");
+}
+
+async function ensureGeoipDb(): Promise<string | null> {
+  const dir = getGeoipDir();
+  const dbPath = path.join(dir, GEOIP_DB_FILENAME);
+
+  if (fs.existsSync(dbPath)) {
+    maybeTriggerUpdate(dbPath);
+    return dbPath;
+  }
+
+  try {
+    await downloadGeoipDb(dbPath);
+    return dbPath;
+  } catch {
+    return null;
+  }
+}
+
+async function downloadGeoipDb(dest: string): Promise<void> {
+  const dir = path.dirname(dest);
+  fs.mkdirSync(dir, { recursive: true });
+  console.log("[cloakbrowser] Downloading GeoIP database (~70 MB)…");
+
+  const tmpPath = `${dest}.tmp.${Date.now()}`;
+  try {
+    const response = await fetch(GEOIP_DB_URL, { redirect: "follow" });
+    if (!response.ok || !response.body) {
+      throw new Error(`HTTP ${response.status}`);
+    }
+
+    const fileStream = createWriteStream(tmpPath);
+    const reader = response.body.getReader();
+
+    for (;;) {
+      const { done, value } = await reader.read();
+      if (done) break;
+      fileStream.write(value);
+    }
+
+    await new Promise<void>((resolve, reject) => {
+      fileStream.end(() => resolve());
+      fileStream.on("error", reject);
+    });
+
+    fs.renameSync(tmpPath, dest);
+    console.log(`[cloakbrowser] GeoIP database ready: ${dest}`);
+  } catch (err) {
+    if (fs.existsSync(tmpPath)) fs.unlinkSync(tmpPath);
+    throw err;
+  }
+}
+
+function maybeTriggerUpdate(dbPath: string): void {
+  try {
+    const age = Date.now() - fs.statSync(dbPath).mtimeMs;
+    if (age < GEOIP_UPDATE_INTERVAL_MS) return;
+  } catch {
+    return;
+  }
+  // Fire-and-forget background update
+  downloadGeoipDb(dbPath).catch(() => {});
+}
+
+/**
+ * Auto-fill timezone/locale from proxy IP when geoip is enabled.
+ * Shared by the Playwright and Puppeteer wrappers.
+ */
+export async function maybeResolveGeoip(
+  options: LaunchOptions
+): Promise<{ timezone?: string; locale?: string }> {
+  if (!options.geoip || !options.proxy) return { timezone: options.timezone, locale: options.locale };
+  if (options.timezone && options.locale) return { timezone: options.timezone, locale: options.locale };
+
+  let proxyUrl = typeof options.proxy === "string" ? options.proxy : options.proxy.server;
+  if (!proxyUrl) return { timezone: options.timezone, locale: options.locale };
+  proxyUrl = ensureProxyScheme(proxyUrl);
+  const { timezone: geoTz, locale: geoLocale } = await resolveProxyGeo(proxyUrl);
+  return {
+    timezone: options.timezone ?? geoTz ?? undefined,
+    locale: options.locale ?? geoLocale ?? undefined,
+  };
+}

js/src/human/config.ts

@@ -0,0 +1,232 @@
+/**
+ * cloakbrowser-human — Configuration and presets.
+ *
+ * All numeric parameters for human-like behavior are centralized here.
+ * Two built-in presets: 'default' (normal human speed) and 'careful' (slower, more cautious).
+ */
+
+// ---------------------------------------------------------------------------
+// Types
+// ---------------------------------------------------------------------------
+
+export interface HumanConfig {
+  // Keyboard
+  typing_delay: number;
+  typing_delay_spread: number;
+  typing_pause_chance: number;
+  typing_pause_range: [number, number];
+  shift_down_delay: [number, number];
+  shift_up_delay: [number, number];
+  key_hold: [number, number];
+  field_switch_delay: [number, number];
+  mistype_chance: number;
+  mistype_delay_notice: [number, number];
+  mistype_delay_correct: [number, number];
+
+
+  // Mouse — movement
+  mouse_steps_divisor: number;
+  mouse_min_steps: number;
+  mouse_max_steps: number;
+  mouse_wobble_max: number;
+  mouse_overshoot_chance: number;
+  mouse_overshoot_px: [number, number];
+  mouse_burst_size: [number, number];
+  mouse_burst_pause: [number, number];
+
+  // Mouse — clicks
+  click_aim_delay_input: [number, number];
+  click_aim_delay_button: [number, number];
+  click_hold_input: [number, number];
+  click_hold_button: [number, number];
+  click_input_x_range: [number, number];
+
+  // Mouse — idle
+  idle_drift_px: number;
+  idle_pause_range: [number, number];
+
+  // Scroll
+  scroll_delta_base: [number, number];
+  scroll_delta_variance: number;
+  scroll_pause_fast: [number, number];
+  scroll_pause_slow: [number, number];
+  scroll_accel_steps: [number, number];
+  scroll_decel_steps: [number, number];
+  scroll_overshoot_chance: number;
+  scroll_overshoot_px: [number, number];
+  scroll_settle_delay: [number, number];
+  scroll_target_zone: [number, number];
+  scroll_pre_move_delay: [number, number];
+
+  // Initial cursor position
+  initial_cursor_x: [number, number];
+  initial_cursor_y: [number, number];
+
+
+  // Idle micro-movements between actions (opt-in, adds latency)
+  idle_between_actions: boolean;
+  idle_between_duration: [number, number];
+}
+
+export type HumanPreset = 'default' | 'careful';
+
+// ---------------------------------------------------------------------------
+// Default preset
+// ---------------------------------------------------------------------------
+
+const DEFAULT_CONFIG: HumanConfig = {
+  // Keyboard
+  typing_delay: 70,
+  typing_delay_spread: 40,
+  typing_pause_chance: 0.1,
+  typing_pause_range: [400, 1000],
+  shift_down_delay: [30, 70],
+  shift_up_delay: [20, 50],
+  key_hold: [15, 35],
+  field_switch_delay: [800, 1500],
+  // Mistype (typo simulation)
+  mistype_chance: 0.02,
+  mistype_delay_notice: [100, 300],
+  mistype_delay_correct: [50, 150],
+
+  // Mouse — movement
+  mouse_steps_divisor: 8,
+  mouse_min_steps: 25,
+  mouse_max_steps: 80,
+  mouse_wobble_max: 1.5,
+  mouse_overshoot_chance: 0.15,
+  mouse_overshoot_px: [3, 6],
+  mouse_burst_size: [3, 5],
+  mouse_burst_pause: [8, 18],
+
+  // Mouse — clicks
+  click_aim_delay_input: [60, 140],
+  click_aim_delay_button: [80, 200],
+  click_hold_input: [40, 100],
+  click_hold_button: [60, 150],
+  click_input_x_range: [0.05, 0.30],
+
+  // Mouse — idle
+  idle_drift_px: 3,
+  idle_pause_range: [300, 1000],
+
+  // Scroll
+  scroll_delta_base: [80, 130],
+  scroll_delta_variance: 0.2,
+  scroll_pause_fast: [30, 80],
+  scroll_pause_slow: [80, 200],
+  scroll_accel_steps: [2, 3],
+  scroll_decel_steps: [2, 3],
+  scroll_overshoot_chance: 0.1,
+  scroll_overshoot_px: [50, 150],
+  scroll_settle_delay: [300, 600],
+  scroll_target_zone: [0.20, 0.80],
+  scroll_pre_move_delay: [100, 300],
+
+  // Initial cursor position (as if coming from the address bar area)
+  initial_cursor_x: [400, 700],
+  initial_cursor_y: [45, 60],
+
+  // Idle micro-movements between actions (off by default)
+  idle_between_actions: false,
+  idle_between_duration: [0.3, 0.8],
+};
+
+// ---------------------------------------------------------------------------
+// Careful preset — everything slower and more deliberate
+// ---------------------------------------------------------------------------
+
+const CAREFUL_CONFIG: HumanConfig = {
+  ...DEFAULT_CONFIG,
+
+  // Keyboard — slower typing
+  typing_delay: 100,
+  typing_delay_spread: 50,
+  typing_pause_chance: 0.15,
+  typing_pause_range: [500, 1200],
+  shift_down_delay: [40, 90],
+  shift_up_delay: [30, 70],
+  key_hold: [20, 45],
+  field_switch_delay: [1000, 2000],
+  mistype_chance: 0.03,
+  mistype_delay_notice: [150, 400],
+  mistype_delay_correct: [80, 200],
+
+  // Mouse — slower, more precise
+  mouse_overshoot_chance: 0.10,
+  mouse_burst_pause: [12, 25],
+
+  // Mouse — clicks (longer aiming and holding)
+  click_aim_delay_input: [80, 180],
+  click_aim_delay_button: [120, 280],
+  click_hold_input: [60, 140],
+  click_hold_button: [80, 200],
+
+  // Scroll — slower
+  scroll_pause_fast: [100, 200],
+  scroll_pause_slow: [250, 600],
+  scroll_settle_delay: [400, 800],
+  scroll_pre_move_delay: [150, 400],
+
+  // Idle between actions enabled for careful preset
+  idle_between_actions: true,
+  idle_between_duration: [0.4, 1.0],
+};
+
+// ---------------------------------------------------------------------------
+// Preset map
+// ---------------------------------------------------------------------------
+
+const PRESETS: Record<HumanPreset, HumanConfig> = {
+  default: DEFAULT_CONFIG,
+  careful: CAREFUL_CONFIG,
+};
+
+/**
+ * Resolve a preset name or partial config into a full HumanConfig.
+ * If `preset` is a string, returns the corresponding built-in config.
+ * Any keys in `overrides` replace the preset values.
+ */
+export function resolveConfig(
+  preset: HumanPreset = 'default',
+  overrides?: Partial<HumanConfig>,
+): HumanConfig {
+  const base = PRESETS[preset];
+  if (!base) {
+    throw new Error(
+      `Unknown humanize preset "${preset}". Valid presets: ${Object.keys(PRESETS).join(', ')}`
+    );
+  }
+  if (!overrides) return { ...base };
+  return { ...base, ...overrides };
+}
+
+
+// ---------------------------------------------------------------------------
+// Utility: random number in range
+// ---------------------------------------------------------------------------
+
+/** Random float in [min, max]. */
+export function rand(min: number, max: number): number {
+  return min + Math.random() * (max - min);
+}
+
+/** Random integer in [min, max] (inclusive). */
+export function randInt(min: number, max: number): number {
+  return Math.floor(rand(min, max + 1));
+}
+
+/** Random value from a [min, max] tuple. */
+export function randRange(range: [number, number]): number {
+  return rand(range[0], range[1]);
+}
+
+/** Random integer from a [min, max] tuple. */
+export function randIntRange(range: [number, number]): number {
+  return randInt(range[0], range[1]);
+}
+
+/** Sleep for `ms` milliseconds. */
+export function sleep(ms: number): Promise<void> {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}

js/src/human/index.ts

@@ -0,0 +1,478 @@
+/**
+ * Human-like behavioral layer for cloakbrowser (JS/TS).
+ *
+ * Activated via humanize: true in launch() / launchContext().
+ * Patches page methods to use Bezier mouse curves, realistic typing, and smooth scrolling.
+ *
+ * Patches all interaction methods:
+ * click, dblclick, hover, type, fill, check, uncheck, selectOption,
+ * press, pressSequentially, tap, dragTo, clear + Frame-level equivalents.
+ */
+
+import type { Browser, BrowserContext, Page, Frame } from 'playwright-core';
+import { HumanConfig, resolveConfig, rand, randRange, sleep } from './config.js';
+import { RawMouse, RawKeyboard, humanMove, humanClick, clickTarget, humanIdle } from './mouse.js';
+import { humanType } from './keyboard.js';
+import { scrollToElement } from './scroll.js';
+
+export { HumanConfig, resolveConfig } from './config.js';
+export { humanMove, humanClick, clickTarget, humanIdle } from './mouse.js';
+export { humanType } from './keyboard.js';
+export { scrollToElement } from './scroll.js';
+
+// --- Platform-aware select-all shortcut (macOS uses Meta, others use Control) ---
+const SELECT_ALL = process.platform === 'darwin' ? 'Meta+a' : 'Control+a';
+
+class CursorState {
+  x = 0;
+  y = 0;
+  initialized = false;
+}
+
+async function isInputElement(page: Page, selector: string): Promise<boolean> {
+  return page.evaluate((sel: string) => {
+    const el = document.querySelector(sel);
+    if (!el) return false;
+    const tag = el.tagName.toLowerCase();
+    return tag === 'input' || tag === 'textarea'
+      || el.getAttribute('contenteditable') === 'true';
+  }, selector).catch(() => false);
+}
+
+async function isSelectorFocused(page: Page, selector: string): Promise<boolean> {
+  return page.evaluate((sel: string) => {
+    const el = document.querySelector(sel);
+    return el === document.activeElement;
+  }, selector).catch(() => false);
+}
+
+// ============================================================================
+// Page-level patching
+// ============================================================================
+
+/**
+ * Replace page methods with human-like implementations.
+ */
+function patchPage(page: Page, cfg: HumanConfig, cursor: CursorState): void {
+  const originals = {
+    click: page.click.bind(page),
+    dblclick: page.dblclick.bind(page),
+    hover: page.hover.bind(page),
+    type: page.type.bind(page),
+    fill: page.fill.bind(page),
+    check: page.check.bind(page),
+    uncheck: page.uncheck.bind(page),
+    selectOption: page.selectOption.bind(page),
+    press: page.press.bind(page),
+    goto: page.goto.bind(page),
+    isChecked: page.isChecked.bind(page),
+    mouseMove: page.mouse.move.bind(page.mouse),
+    mouseClick: page.mouse.click.bind(page.mouse),
+    mouseDblclick: page.mouse.dblclick.bind(page.mouse),
+    mouseWheel: page.mouse.wheel.bind(page.mouse),
+    mouseDown: page.mouse.down.bind(page.mouse),
+    mouseUp: page.mouse.up.bind(page.mouse),
+    keyboardType: page.keyboard.type.bind(page.keyboard),
+    keyboardDown: page.keyboard.down.bind(page.keyboard),
+    keyboardUp: page.keyboard.up.bind(page.keyboard),
+    keyboardPress: page.keyboard.press.bind(page.keyboard),
+    keyboardInsertText: page.keyboard.insertText.bind(page.keyboard),
+  };
+
+  (page as any)._original = originals;
+  (page as any)._humanCfg = cfg;
+
+  const raw: RawMouse = {
+    move: originals.mouseMove,
+    down: originals.mouseDown,
+    up: originals.mouseUp,
+    wheel: originals.mouseWheel,
+  };
+
+  const rawKb: RawKeyboard = {
+    down: originals.keyboardDown,
+    up: originals.keyboardUp,
+    type: originals.keyboardType,
+    insertText: originals.keyboardInsertText,
+  };
+
+  async function ensureCursorInit(): Promise<void> {
+    if (!cursor.initialized) {
+      cursor.x = rand(cfg.initial_cursor_x[0], cfg.initial_cursor_x[1]);
+      cursor.y = rand(cfg.initial_cursor_y[0], cfg.initial_cursor_y[1]);
+      await originals.mouseMove(cursor.x, cursor.y);
+      cursor.initialized = true;
+    }
+  }
+
+  // --- goto ---
+  const humanGoto = async (url: string, options?: any) => {
+    const response = await originals.goto(url, options);
+    // Patch any new frames after navigation
+    patchFrames(page, cfg, cursor, raw, rawKb, originals);
+    return response;
+  };
+
+  // --- click ---
+  const humanClickFn = async (selector: string, options?: any) => {
+    await ensureCursorInit();
+    if (cfg.idle_between_actions) {
+      await humanIdle(raw, rand(cfg.idle_between_duration[0], cfg.idle_between_duration[1]), cursor.x, cursor.y, cfg);
+    }
+    const { box, cursorX, cursorY } = await scrollToElement(page, raw, selector, cursor.x, cursor.y, cfg);
+    cursor.x = cursorX;
+    cursor.y = cursorY;
+    const isInput = await isInputElement(page, selector);
+    const target = clickTarget(box, isInput, cfg);
+    await humanMove(raw, cursor.x, cursor.y, target.x, target.y, cfg);
+    cursor.x = target.x;
+    cursor.y = target.y;
+    await humanClick(raw, isInput, cfg);
+  };
+
+  // --- dblclick ---
+  const humanDblclickFn = async (selector: string, options?: any) => {
+    await ensureCursorInit();
+    if (cfg.idle_between_actions) {
+      await humanIdle(raw, rand(cfg.idle_between_duration[0], cfg.idle_between_duration[1]), cursor.x, cursor.y, cfg);
+    }
+    const { box, cursorX, cursorY } = await scrollToElement(page, raw, selector, cursor.x, cursor.y, cfg);
+    cursor.x = cursorX;
+    cursor.y = cursorY;
+    const isInput = await isInputElement(page, selector);
+    const target = clickTarget(box, isInput, cfg);
+    await humanMove(raw, cursor.x, cursor.y, target.x, target.y, cfg);
+    cursor.x = target.x;
+    cursor.y = target.y;
+    await raw.down({ clickCount: 2 });
+    await sleep(rand(30, 60));
+    await raw.up({ clickCount: 2 });
+  };
+
+  // --- hover ---
+  const humanHoverFn = async (selector: string, options?: any) => {
+    await ensureCursorInit();
+    if (cfg.idle_between_actions) {
+      await humanIdle(raw, rand(cfg.idle_between_duration[0], cfg.idle_between_duration[1]), cursor.x, cursor.y, cfg);
+    }
+    const { box, cursorX, cursorY } = await scrollToElement(page, raw, selector, cursor.x, cursor.y, cfg);
+    cursor.x = cursorX;
+    cursor.y = cursorY;
+    const target = clickTarget(box, false, cfg);
+    await humanMove(raw, cursor.x, cursor.y, target.x, target.y, cfg);
+    cursor.x = target.x;
+    cursor.y = target.y;
+  };
+
+  // --- type ---
+  const humanTypeFn = async (selector: string, text: string, options?: any) => {
+    await sleep(randRange(cfg.field_switch_delay));
+    await humanClickFn(selector);
+    await sleep(rand(100, 250));
+    await humanType(page, rawKb, text, cfg);
+  };
+
+  // --- fill (clears existing content first) ---
+  const humanFillFn = async (selector: string, value: string, options?: any) => {
+    await sleep(randRange(cfg.field_switch_delay));
+    await humanClickFn(selector);
+    await sleep(rand(100, 250));
+    await originals.keyboardPress(SELECT_ALL);
+    await sleep(rand(30, 80));
+    await originals.keyboardPress('Backspace');
+    await sleep(rand(50, 150));
+    await humanType(page, rawKb, value, cfg);
+  };
+
+  // --- clear ---
+  const humanClearFn = async (selector: string, options?: any) => {
+    if (!await isSelectorFocused(page, selector)) {
+      await humanClickFn(selector);
+    }
+    await sleep(rand(50, 150));
+    await originals.keyboardPress(SELECT_ALL);
+    await sleep(rand(30, 80));
+    await originals.keyboardPress('Backspace');
+  };
+
+  // --- check ---
+  const humanCheckFn = async (selector: string, options?: any) => {
+    if (cfg.idle_between_actions) {
+      await humanIdle(raw, rand(cfg.idle_between_duration[0], cfg.idle_between_duration[1]), cursor.x, cursor.y, cfg);
+    }
+    const checked = await originals.isChecked(selector).catch(() => false);
+    if (!checked) {
+      await humanClickFn(selector);
+    }
+  };
+
+  // --- uncheck ---
+  const humanUncheckFn = async (selector: string, options?: any) => {
+    if (cfg.idle_between_actions) {
+      await humanIdle(raw, rand(cfg.idle_between_duration[0], cfg.idle_between_duration[1]), cursor.x, cursor.y, cfg);
+    }
+    const checked = await originals.isChecked(selector).catch(() => true);
+    if (checked) {
+      await humanClickFn(selector);
+    }
+  };
+
+  // --- selectOption ---
+  const humanSelectOptionFn = async (selector: string, values: any, options?: any) => {
+    await humanHoverFn(selector);
+    await sleep(rand(100, 300));
+    return originals.selectOption(selector, values, options);
+  };
+
+  // --- press (checks focus first — avoids redundant mouse moves) ---
+  const humanPressFn = async (selector: string, key: string, options?: any) => {
+    if (!await isSelectorFocused(page, selector)) {
+      await humanClickFn(selector);
+    }
+    await sleep(rand(50, 150));
+    await originals.keyboardPress(key);
+  };
+
+  // --- pressSequentially ---
+  const humanPressSequentiallyFn = async (selector: string, text: string, options?: any) => {
+    if (!await isSelectorFocused(page, selector)) {
+      await humanClickFn(selector);
+    }
+    await sleep(rand(100, 250));
+    await humanType(page, rawKb, text, cfg);
+  };
+
+  // --- tap ---
+  const humanTapFn = async (selector: string, options?: any) => {
+    await humanClickFn(selector, options);
+  };
+
+  // Assign page-level patches
+  (page as any).goto = humanGoto;
+  (page as any).click = humanClickFn;
+  (page as any).dblclick = humanDblclickFn;
+  (page as any).hover = humanHoverFn;
+  (page as any).type = humanTypeFn;
+  (page as any).fill = humanFillFn;
+  (page as any).check = humanCheckFn;
+  (page as any).uncheck = humanUncheckFn;
+  (page as any).selectOption = humanSelectOptionFn;
+  (page as any).press = humanPressFn;
+
+  // --- mouse patches ---
+  page.mouse.move = async (x: number, y: number, options?: any) => {
+    await ensureCursorInit();
+    await humanMove(raw, cursor.x, cursor.y, x, y, cfg);
+    cursor.x = x;
+    cursor.y = y;
+  };
+
+  page.mouse.click = async (x: number, y: number, options?: any) => {
+    await ensureCursorInit();
+    await humanMove(raw, cursor.x, cursor.y, x, y, cfg);
+    cursor.x = x;
+    cursor.y = y;
+    await humanClick(raw, false, cfg);
+  };
+
+  // --- keyboard patches ---
+  page.keyboard.type = async (text: string, options?: any) => {
+    await humanType(page, rawKb, text, cfg);
+  };
+
+  // Store helpers for frame patching
+  (page as any)._humanCursor = cursor;
+  (page as any)._humanRaw = raw;
+  (page as any)._humanRawKb = rawKb;
+  (page as any)._humanOriginals = originals;
+  (page as any)._humanClickFn = humanClickFn;
+  (page as any)._humanHoverFn = humanHoverFn;
+  (page as any)._humanClearFn = humanClearFn;
+  (page as any)._humanPressFn = humanPressFn;
+  (page as any)._humanPressSequentiallyFn = humanPressSequentiallyFn;
+  (page as any)._humanTapFn = humanTapFn;
+  (page as any)._ensureCursorInit = ensureCursorInit;
+
+  // Initialize cursor immediately so it doesn't visibly jump from (0,0)
+  cursor.x = rand(cfg.initial_cursor_x[0], cfg.initial_cursor_x[1]);
+  cursor.y = rand(cfg.initial_cursor_y[0], cfg.initial_cursor_y[1]);
+  originals.mouseMove(cursor.x, cursor.y).then(() => {
+    cursor.initialized = true;
+  }).catch(() => {});
+
+  // --- Patch Frame-level methods (for sub-frames) ---
+  patchFrames(page, cfg, cursor, raw, rawKb, originals);
+}
+
+
+// ============================================================================
+// Frame-level patching
+// ============================================================================
+
+/**
+ * Patch Frame methods so Locator-based calls go through humanization.
+ * All 11 methods patched: click, dblclick, hover, type, fill, check, uncheck,
+ * selectOption, press, clear, dragAndDrop.
+ */
+function patchFrames(
+  page: Page,
+  cfg: HumanConfig,
+  cursor: CursorState,
+  raw: RawMouse,
+  rawKb: RawKeyboard,
+  originals: any,
+): void {
+  for (const frame of iterFrames(page)) {
+    patchSingleFrame(frame, page, cfg, originals);
+  }
+}
+
+function patchSingleFrame(frame: Frame, page: Page, cfg: HumanConfig, originals: any): void {
+  if ((frame as any)._humanPatched) return;
+  (frame as any)._humanPatched = true;
+
+  // Save originals for methods that need fallback
+  const origFrameSelectOption = frame.selectOption.bind(frame);
+  const origFrameDragAndDrop = frame.dragAndDrop.bind(frame);
+
+  (frame as any).click = async (selector: string, options?: any) => {
+    await (page as any).click(selector, options);
+  };
+
+  (frame as any).dblclick = async (selector: string, options?: any) => {
+    await (page as any).dblclick(selector, options);
+  };
+
+  (frame as any).hover = async (selector: string, options?: any) => {
+    await (page as any).hover(selector, options);
+  };
+
+  (frame as any).type = async (selector: string, text: string, options?: any) => {
+    await (page as any).type(selector, text, options);
+  };
+
+  (frame as any).fill = async (selector: string, value: string, options?: any) => {
+    await (page as any).fill(selector, value, options);
+  };
+
+  (frame as any).check = async (selector: string, options?: any) => {
+    await (page as any).check(selector, options);
+  };
+
+  (frame as any).uncheck = async (selector: string, options?: any) => {
+    await (page as any).uncheck(selector, options);
+  };
+
+  (frame as any).selectOption = async (selector: string, values: any, options?: any) => {
+    await (page as any).hover(selector);
+    await sleep(rand(100, 300));
+    return origFrameSelectOption(selector, values, options);
+  };
+
+  (frame as any).press = async (selector: string, key: string, options?: any) => {
+    await (page as any).press(selector, key, options);
+  };
+
+  (frame as any).clear = async (selector: string, options?: any) => {
+    if (!await isSelectorFocused(page, selector)) {
+      await (page as any).click(selector);
+    }
+    await sleep(rand(50, 150));
+    await originals.keyboardPress(SELECT_ALL);
+    await sleep(rand(30, 80));
+    await originals.keyboardPress('Backspace');
+  };
+
+  (frame as any).dragAndDrop = async (source: string, target: string, options?: any) => {
+    const srcBox = await frame.locator(source).boundingBox().catch(() => null);
+    const tgtBox = await frame.locator(target).boundingBox().catch(() => null);
+
+    if (srcBox && tgtBox) {
+      const sx = srcBox.x + srcBox.width / 2;
+      const sy = srcBox.y + srcBox.height / 2;
+      const tx = tgtBox.x + tgtBox.width / 2;
+      const ty = tgtBox.y + tgtBox.height / 2;
+
+      await page.mouse.move(sx, sy);
+      await sleep(rand(100, 200));
+      await originals.mouseDown();
+      await sleep(rand(80, 150));
+      await page.mouse.move(tx, ty);
+      await sleep(rand(80, 150));
+      await originals.mouseUp();
+    } else {
+      return origFrameDragAndDrop(source, target, options);
+    }
+  };
+}
+
+
+function* iterFrames(page: Page): Generator<Frame> {
+  try {
+    const mainFrame = page.mainFrame();
+    yield mainFrame;
+    for (const child of mainFrame.childFrames()) {
+      yield child;
+    }
+  } catch {}
+}
+
+
+// ============================================================================
+// Context-level patching
+// ============================================================================
+
+function patchContext(context: BrowserContext, cfg: HumanConfig): void {
+  const cursor = new CursorState();
+  for (const page of context.pages()) {
+    patchPage(page, cfg, cursor);
+  }
+  context.on('page', (page: Page) => {
+    if (!(page as any)._original) {
+      patchPage(page, cfg, new CursorState());
+    }
+  });
+
+  const origNewPage = context.newPage.bind(context);
+  (context as any).newPage = async () => {
+    const page = await origNewPage();
+    if (!(page as any)._original) {
+      patchPage(page, cfg, new CursorState());
+    }
+    return page;
+  };
+}
+
+
+// ============================================================================
+// Browser-level patching
+// ============================================================================
+
+export function patchBrowser(browser: Browser, cfg: HumanConfig): void {
+  for (const context of browser.contexts()) {
+    patchContext(context, cfg);
+  }
+
+  const origNewContext = browser.newContext.bind(browser);
+  (browser as any).newContext = async (options?: any) => {
+    const context = await origNewContext(options);
+    patchContext(context, cfg);
+    return context;
+  };
+
+  const origNewPage = browser.newPage.bind(browser);
+  (browser as any).newPage = async (options?: any) => {
+    const page = await origNewPage(options);
+    if (!(page as any)._original) {
+      const ctx = page.context();
+      if (!(ctx as any)._humanPatched) {
+        patchContext(ctx, cfg);
+        (ctx as any)._humanPatched = true;
+      }
+      patchPage(page, cfg, new CursorState());
+    }
+    return page;
+  };
+}
+
+export { patchContext, patchPage };

js/src/human/keyboard.ts

@@ -0,0 +1,128 @@
+/**
+ * cloakbrowser-human — Human-like keyboard input.
+ */
+
+import type { Page } from 'playwright-core';
+import { RawKeyboard } from './mouse.js';
+import { HumanConfig, rand, randRange, sleep } from './config.js';
+
+const SHIFT_SYMBOLS = new Set([
+  '@', '#', '!', '$', '%', '^', '&', '*', '(', ')',
+  '_', '+', '{', '}', '|', ':', '"', '<', '>', '?', '~',
+]);
+
+const NEARBY_KEYS: Record<string, string> = {
+  a: 'sqwz', b: 'vghn', c: 'xdfv', d: 'sfecx', e: 'wrsdf',
+  f: 'dgrtcv', g: 'fhtyb', h: 'gjybn', i: 'ujko', j: 'hkunm',
+  k: 'jloi', l: 'kop', m: 'njk', n: 'bhjm', o: 'iklp',
+  p: 'ol', q: 'wa', r: 'edft', s: 'awedxz', t: 'rfgy',
+  u: 'yhji', v: 'cfgb', w: 'qase', x: 'zsdc', y: 'tghu',
+  z: 'asx',
+  '1': '2q', '2': '13qw', '3': '24we', '4': '35er', '5': '46rt',
+  '6': '57ty', '7': '68yu', '8': '79ui', '9': '80io', '0': '9p',
+};
+
+function isAscii(ch: string): boolean {
+  const code = ch.codePointAt(0);
+  return code !== undefined && code < 128;
+}
+
+function getNearbyKey(ch: string): string {
+  const lower = ch.toLowerCase();
+  if (lower in NEARBY_KEYS) {
+    const neighbors = NEARBY_KEYS[lower];
+    const wrong = neighbors[Math.floor(Math.random() * neighbors.length)];
+    return ch === ch.toUpperCase() && ch !== ch.toLowerCase() ? wrong.toUpperCase() : wrong;
+  }
+  return ch;
+}
+
+export async function humanType(
+  page: Page,
+  raw: RawKeyboard,
+  text: string,
+  cfg: HumanConfig,
+): Promise<void> {
+  const chars = [...text]; // Handle emoji surrogate pairs correctly
+
+  for (let i = 0; i < chars.length; i++) {
+    const ch = chars[i];
+
+    // Non-ASCII characters (Cyrillic, CJK, emoji) — use insertText
+    if (!isAscii(ch)) {
+      await sleep(randRange(cfg.key_hold));
+      await raw.insertText(ch);
+      if (i < chars.length - 1) {
+        await interCharDelay(cfg);
+      }
+      continue;
+    }
+
+    // Mistype chance — only for ASCII alphanumeric
+    if (Math.random() < cfg.mistype_chance && /^[a-zA-Z0-9]$/.test(ch)) {
+      const wrong = getNearbyKey(ch);
+      await typeNormalChar(raw, wrong, cfg);
+      await sleep(randRange(cfg.mistype_delay_notice));
+      await raw.down('Backspace');
+      await sleep(randRange(cfg.key_hold));
+      await raw.up('Backspace');
+      await sleep(randRange(cfg.mistype_delay_correct));
+    }
+
+    if (isUpperCase(ch)) {
+      await typeShiftedChar(raw, ch, cfg);
+    } else if (SHIFT_SYMBOLS.has(ch)) {
+      await typeShiftSymbol(page, raw, ch, cfg);
+    } else {
+      await typeNormalChar(raw, ch, cfg);
+    }
+
+    if (i < chars.length - 1) {
+      await interCharDelay(cfg);
+    }
+  }
+}
+
+async function typeNormalChar(raw: RawKeyboard, ch: string, cfg: HumanConfig): Promise<void> {
+  await raw.down(ch);
+  await sleep(randRange(cfg.key_hold));
+  await raw.up(ch);
+}
+
+async function typeShiftedChar(raw: RawKeyboard, ch: string, cfg: HumanConfig): Promise<void> {
+  await raw.down('Shift');
+  await sleep(randRange(cfg.shift_down_delay));
+  await raw.down(ch);
+  await sleep(randRange(cfg.key_hold));
+  await raw.up(ch);
+  await sleep(randRange(cfg.shift_up_delay));
+  await raw.up('Shift');
+}
+
+async function typeShiftSymbol(page: Page, raw: RawKeyboard, ch: string, cfg: HumanConfig): Promise<void> {
+  await raw.down('Shift');
+  await sleep(randRange(cfg.shift_down_delay));
+  await raw.insertText(ch);
+  await page.evaluate((key: string) => {
+    const el = document.activeElement;
+    if (el) {
+      el.dispatchEvent(new KeyboardEvent('keydown', { key, bubbles: true }));
+      el.dispatchEvent(new KeyboardEvent('keyup', { key, bubbles: true }));
+    }
+  }, ch);
+  await sleep(randRange(cfg.shift_up_delay));
+  await raw.up('Shift');
+}
+
+function isUpperCase(ch: string): boolean {
+  return ch.length === 1 && ch >= 'A' && ch <= 'Z';
+}
+
+async function interCharDelay(cfg: HumanConfig): Promise<void> {
+  if (Math.random() < cfg.typing_pause_chance) {
+    await sleep(randRange(cfg.typing_pause_range));
+  } else {
+    const delay = cfg.typing_delay + (Math.random() - 0.5) * 2 * cfg.typing_delay_spread;
+    await sleep(Math.max(10, delay));
+  }
+}

js/src/human/mouse.ts

@@ -0,0 +1,193 @@
+/**
+ * cloakbrowser-human — Human-like mouse movement and clicking.
+ */
+
+import { HumanConfig, rand, randRange, randIntRange, sleep } from './config.js';
+
+// ---------------------------------------------------------------------------
+// Raw interface — original Playwright methods, bypassing the wrapper
+// ---------------------------------------------------------------------------
+
+export interface RawMouse {
+  move: (x: number, y: number) => Promise<void>;
+  down: (options?: any) => Promise<void>;
+  up: (options?: any) => Promise<void>;
+  wheel: (deltaX: number, deltaY: number) => Promise<void>;
+}
+
+export interface RawKeyboard {
+  down: (key: string) => Promise<void>;
+  up: (key: string) => Promise<void>;
+  type: (text: string) => Promise<void>;
+  insertText: (text: string) => Promise<void>;
+}
+
+// ---------------------------------------------------------------------------
+// Easing
+// ---------------------------------------------------------------------------
+
+function easeInOut(t: number): number {
+  return t < 0.5
+    ? 4 * t * t * t
+    : 1 - Math.pow(-2 * t + 2, 3) / 2;
+}
+
+// ---------------------------------------------------------------------------
+// Bezier
+// ---------------------------------------------------------------------------
+
+interface Point {
+  x: number;
+  y: number;
+}
+
+function bezier(p0: Point, p1: Point, p2: Point, p3: Point, t: number): Point {
+  const u = 1 - t;
+  const uu = u * u;
+  const uuu = uu * u;
+  const tt = t * t;
+  const ttt = tt * t;
+  return {
+    x: uuu * p0.x + 3 * uu * t * p1.x + 3 * u * tt * p2.x + ttt * p3.x,
+    y: uuu * p0.y + 3 * uu * t * p1.y + 3 * u * tt * p2.y + ttt * p3.y,
+  };
+}
+
+function randomControlPoints(start: Point, end: Point): [Point, Point] {
+  const dx = end.x - start.x;
+  const dy = end.y - start.y;
+  const dist = Math.hypot(dx, dy);
+  const px = -dy / (dist || 1);
+  const py = dx / (dist || 1);
+  const bias1 = rand(-0.3, 0.3) * dist;
+  const bias2 = rand(-0.3, 0.3) * dist;
+  return [
+    { x: start.x + dx * 0.25 + px * bias1, y: start.y + dy * 0.25 + py * bias1 },
+    { x: start.x + dx * 0.75 + px * bias2, y: start.y + dy * 0.75 + py * bias2 },
+  ];
+}
+
+// ---------------------------------------------------------------------------
+// Human mouse movement
+// ---------------------------------------------------------------------------
+
+export async function humanMove(
+  raw: RawMouse,
+  startX: number,
+  startY: number,
+  endX: number,
+  endY: number,
+  cfg: HumanConfig,
+): Promise<void> {
+  const dist = Math.hypot(endX - startX, endY - startY);
+  if (dist < 1) return;
+
+  const steps = Math.max(
+    cfg.mouse_min_steps,
+    Math.min(cfg.mouse_max_steps, Math.round(dist / cfg.mouse_steps_divisor)),
+  );
+
+  const start: Point = { x: startX, y: startY };
+  const end: Point = { x: endX, y: endY };
+  const [cp1, cp2] = randomControlPoints(start, end);
+
+  let burstCounter = 0;
+  const burstSize = randIntRange(cfg.mouse_burst_size);
+
+  for (let i = 0; i <= steps; i++) {
+    const progress = i / steps;
+    const easedT = easeInOut(progress);
+    const pt = bezier(start, cp1, cp2, end, easedT);
+
+    const wobbleAmp = Math.sin(Math.PI * progress) * cfg.mouse_wobble_max;
+    const wx = pt.x + (Math.random() - 0.5) * 2 * wobbleAmp;
+    const wy = pt.y + (Math.random() - 0.5) * 2 * wobbleAmp;
+
+    await raw.move(Math.round(wx), Math.round(wy));
+
+    burstCounter++;
+    if (burstCounter >= burstSize && i < steps) {
+      await sleep(randRange(cfg.mouse_burst_pause));
+      burstCounter = 0;
+    }
+  }
+
+  if (Math.random() < cfg.mouse_overshoot_chance) {
+    const overshootDist = randRange(cfg.mouse_overshoot_px);
+    const angle = Math.atan2(endY - startY, endX - startX);
+    const ovX = Math.round(endX + Math.cos(angle) * overshootDist);
+    const ovY = Math.round(endY + Math.sin(angle) * overshootDist);
+    await raw.move(ovX, ovY);
+    await sleep(rand(30, 70));
+    const corrX = Math.round(endX + (Math.random() - 0.5) * 4);
+    const corrY = Math.round(endY + (Math.random() - 0.5) * 4);
+    await raw.move(corrX, corrY);
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Human click
+// ---------------------------------------------------------------------------
+
+export function clickTarget(
+  box: { x: number; y: number; width: number; height: number },
+  isInput: boolean,
+  cfg: HumanConfig,
+): Point {
+  if (isInput) {
+    const xFrac = randRange(cfg.click_input_x_range);
+    const yFrac = rand(0.30, 0.70);
+    return {
+      x: Math.round(box.x + box.width * xFrac),
+      y: Math.round(box.y + box.height * yFrac),
+    };
+  }
+  const xFrac = rand(0.35, 0.65);
+  const yFrac = rand(0.35, 0.65);
+  return {
+    x: Math.round(box.x + box.width * xFrac),
+    y: Math.round(box.y + box.height * yFrac),
+  };
+}
+
+export async function humanClick(
+  raw: RawMouse,
+  isInput: boolean,
+  cfg: HumanConfig,
+): Promise<void> {
+  const aimDelay = isInput
+    ? randRange(cfg.click_aim_delay_input)
+    : randRange(cfg.click_aim_delay_button);
+  await sleep(aimDelay);
+
+  const holdTime = isInput
+    ? randRange(cfg.click_hold_input)
+    : randRange(cfg.click_hold_button);
+  await raw.down();
+  await sleep(holdTime);
+  await raw.up();
+}
+
+// ---------------------------------------------------------------------------
+// Human idle / drift
+// ---------------------------------------------------------------------------
+
+export async function humanIdle(
+  raw: RawMouse,
+  seconds: number,
+  cx: number,
+  cy: number,
+  cfg: HumanConfig,
+): Promise<void> {
+  const endTime = Date.now() + seconds * 1000;
+  let x = cx;
+  let y = cy;
+  while (Date.now() < endTime) {
+    const dx = (Math.random() - 0.5) * 2 * cfg.idle_drift_px;
+    const dy = (Math.random() - 0.5) * 2 * cfg.idle_drift_px;
+    x += dx;
+    y += dy;
+    await raw.move(Math.round(x), Math.round(y));
+    await sleep(randRange(cfg.idle_pause_range));
+  }
+}

js/src/human/scroll.ts

@@ -0,0 +1,150 @@
+/**
+ * cloakbrowser-human — Human-like scrolling via mouse wheel events.
+ */
+
+import type { Page } from 'playwright-core';
+import { HumanConfig, rand, randRange, randIntRange, sleep } from './config.js';
+import { RawMouse, humanMove } from './mouse.js';
+
+interface ElementBounds {
+  x: number;
+  y: number;
+  width: number;
+  height: number;
+}
+
+function isInViewport(
+  bounds: ElementBounds,
+  viewportHeight: number,
+  cfg: HumanConfig,
+): boolean {
+  const topEdge = bounds.y;
+  const bottomEdge = bounds.y + bounds.height;
+  const zoneTop = viewportHeight * cfg.scroll_target_zone[0];
+  const zoneBottom = viewportHeight * cfg.scroll_target_zone[1];
+  return topEdge >= zoneTop && bottomEdge <= zoneBottom;
+}
+
+async function smoothWheel(raw: RawMouse, delta: number, cfg: HumanConfig): Promise<void> {
+  const absD = Math.abs(delta);
+  const sign = delta > 0 ? 1 : -1;
+  let sent = 0;
+  while (sent < absD) {
+    const stepSize = rand(20, 40);
+    const chunk = Math.min(stepSize, absD - sent);
+    await raw.wheel(0, Math.round(chunk) * sign);
+    sent += chunk;
+    await sleep(rand(8, 20));
+  }
+}
+
+export async function scrollToElement(
+  page: Page,
+  raw: RawMouse,
+  selector: string,
+  cursorX: number,
+  cursorY: number,
+  cfg: HumanConfig,
+): Promise<{ box: ElementBounds; cursorX: number; cursorY: number }> {
+  const viewport = page.viewportSize();
+  if (!viewport) throw new Error('Viewport size not available');
+
+  let box = await getElementBox(page, selector);
+  if (!box) {
+    await sleep(200);
+    box = await getElementBox(page, selector);
+    if (!box) throw new Error(`Element not found: ${selector}`);
+  }
+
+  if (isInViewport(box, viewport.height, cfg)) {
+    return { box, cursorX, cursorY };
+  }
+
+  // Move cursor into scroll area
+  const scrollAreaX = Math.round(viewport.width * rand(0.3, 0.7));
+  const scrollAreaY = Math.round(viewport.height * rand(0.3, 0.7));
+  await humanMove(raw, cursorX, cursorY, scrollAreaX, scrollAreaY, cfg);
+  cursorX = scrollAreaX;
+  cursorY = scrollAreaY;
+  await sleep(randRange(cfg.scroll_pre_move_delay));
+
+  // Calculate scroll distance
+  const targetY = viewport.height * rand(cfg.scroll_target_zone[0], cfg.scroll_target_zone[1]);
+  const elementCenter = box.y + box.height / 2;
+  const distanceToScroll = elementCenter - targetY;
+
+  const direction = distanceToScroll > 0 ? 1 : -1;
+  const absDistance = Math.abs(distanceToScroll);
+  const avgDelta = (cfg.scroll_delta_base[0] + cfg.scroll_delta_base[1]) / 2;
+  const totalClicks = Math.max(3, Math.ceil(absDistance / avgDelta));
+  const accelSteps = randIntRange(cfg.scroll_accel_steps);
+  const decelSteps = randIntRange(cfg.scroll_decel_steps);
+
+  let scrolled = 0;
+
+  // Scroll loop: accelerate → cruise → decelerate
+  for (let i = 0; i < totalClicks; i++) {
+    let delta: number;
+    let pause: number;
+
+    if (i < accelSteps) {
+      delta = rand(80, 100);
+      pause = randRange(cfg.scroll_pause_slow);
+    } else if (i >= totalClicks - decelSteps) {
+      delta = rand(60, 90);
+      pause = randRange(cfg.scroll_pause_slow);
+    } else {
+      delta = randRange(cfg.scroll_delta_base);
+      pause = randRange(cfg.scroll_pause_fast);
+    }
+
+    delta *= 1 + (Math.random() - 0.5) * 2 * cfg.scroll_delta_variance;
+    delta = Math.round(delta) * direction;
+
+    await smoothWheel(raw, delta, cfg);
+    scrolled += Math.abs(delta);
+    await sleep(pause);
+
+    // Check visibility every 3 steps
+    if (i % 3 === 2 || i === totalClicks - 1) {
+      box = await getElementBox(page, selector);
+      if (box && isInViewport(box, viewport.height, cfg)) {
+        break;
+      }
+    }
+
+    if (scrolled >= absDistance * 1.1) break;
+  }
+
+  // Optional overshoot + correction
+  if (Math.random() < cfg.scroll_overshoot_chance) {
+    const overshootPx = Math.round(randRange(cfg.scroll_overshoot_px)) * direction;
+    await smoothWheel(raw, overshootPx, cfg);
+    await sleep(randRange(cfg.scroll_settle_delay));
+
+    const corrections = randIntRange([1, 2]);
+    for (let c = 0; c < corrections; c++) {
+      const corrDelta = Math.round(rand(40, 80)) * -direction;
+      await smoothWheel(raw, corrDelta, cfg);
+      await sleep(rand(100, 250));
+    }
+  }
+
+  // Settle
+  await sleep(randRange(cfg.scroll_settle_delay));
+
+  box = await getElementBox(page, selector);
+  if (!box) throw new Error(`Element lost after scrolling: ${selector}`);
+
+  return { box, cursorX, cursorY };
+}
+
+async function getElementBox(page: Page, selector: string): Promise<ElementBounds | null> {
+  const el = page.locator(selector).first();
+  try {
+    const box = await el.boundingBox({ timeout: 2000 });
+    return box;
+  } catch {
+    return null;
+  }
+}

js/src/index.ts

@@ -0,0 +1,28 @@
+/**
+ * CloakBrowser — Stealth Chromium for Node.js
+ *
+ * Default export uses Playwright. For Puppeteer, import from 'cloakbrowser/puppeteer'.
+ *
+ * @example
+ * ```ts
+ * // Playwright (default)
+ * import { launch } from 'cloakbrowser';
+ * const browser = await launch();
+ *
+ * // Puppeteer
+ * import { launch } from 'cloakbrowser/puppeteer';
+ * const browser = await launch();
+ * ```
+ */
+
+// Launch functions (Playwright API)
+export { launch, launchContext, launchPersistentContext } from "./playwright.js";
+
+// Binary management
+export { ensureBinary, clearCache, binaryInfo, checkForUpdate } from "./download.js";
+
+// Config
+export { CHROMIUM_VERSION, getDefaultStealthArgs } from "./config.js";
+
+// Types
+export type { LaunchOptions, LaunchContextOptions, LaunchPersistentContextOptions, BinaryInfo } from "./types.js";

js/src/playwright.ts

@@ -0,0 +1,195 @@
+/**
+ * Playwright launch wrapper for cloakbrowser.
+ * Mirrors Python cloakbrowser/browser.py.
+ */
+
+import type { Browser, BrowserContext } from "playwright-core";
+import type { LaunchOptions, LaunchContextOptions, LaunchPersistentContextOptions } from "./types.js";
+import { DEFAULT_VIEWPORT, IGNORE_DEFAULT_ARGS } from "./config.js";
+import { buildArgs } from "./args.js";
+import { ensureBinary } from "./download.js";
+import { parseProxyUrl } from "./proxy.js";
+import { maybeResolveGeoip } from "./geoip.js";
+
+/** @internal Accept both timezone and timezoneId — either works, no warning. Exported for testing. */
+export function resolveTimezone<T extends { timezone?: string; timezoneId?: string }>(options: T): T {
+  if (options.timezoneId != null) {
+    const merged = { ...options, timezone: options.timezone ?? options.timezoneId };
+    delete (merged as any).timezoneId;
+    return merged;
+  }
+  return options;
+}
+
+/**
+ * Launch stealth Chromium browser via Playwright.
+ *
+ * @example
+ * ```ts
+ * import { launch } from 'cloakbrowser';
+ * const browser = await launch();
+ * const page = await browser.newPage();
+ * await page.goto('https://bot.incolumitas.com');
+ * console.log(await page.title());
+ * await browser.close();
+ * ```
+ */
+export async function launch(options: LaunchOptions = {}): Promise<Browser> {
+  const { chromium } = await import("playwright-core");
+
+  const binaryPath = process.env.CLOAKBROWSER_BINARY_PATH || (await ensureBinary());
+  const resolved = await maybeResolveGeoip(options);
+  const args = buildArgs({ ...options, ...resolved });
+
+  const browser = await chromium.launch({
+    executablePath: binaryPath,
+    headless: options.headless ?? true,
+    args,
+    ignoreDefaultArgs: IGNORE_DEFAULT_ARGS,
+    ...(options.proxy
+      ? { proxy: typeof options.proxy === "string" ? parseProxyUrl(options.proxy) : options.proxy }
+      : {}),
+    ...options.launchOptions,
+  });
+
+  // Human-like behavioral patching
+  if (options.humanize) {
+    const { patchBrowser } = await import('./human/index.js');
+    const { resolveConfig } = await import('./human/config.js');
+    const cfg = resolveConfig(
+      (options.humanPreset as any) ?? 'default',
+      options.humanConfig as any,
+    );
+    patchBrowser(browser, cfg);
+  }
+
+  return browser;
+}
+
+/**
+ * Launch stealth browser and return a BrowserContext with common options pre-set.
+ * Closing the context also closes the browser.
+ *
+ * @example
+ * ```ts
+ * import { launchContext } from 'cloakbrowser';
+ * const context = await launchContext({
+ *   userAgent: 'Mozilla/5.0...',
+ *   viewport: { width: 1920, height: 1080 },
+ * });
+ * const page = await context.newPage();
+ * await page.goto('https://example.com');
+ * await context.close(); // also closes browser
+ * ```
+ */
+export async function launchContext(
+  options: LaunchContextOptions = {}
+): Promise<BrowserContext> {
+  options = resolveTimezone(options);
+  // Resolve geoip BEFORE launch() to avoid double-resolution
+  const resolved = await maybeResolveGeoip(options);
+  // --fingerprint-timezone is process-wide (reads CommandLine in renderer),
+  // so it applies to ALL contexts, not just the default one.
+  // locale and timezone are set via binary flags only — no CDP emulation.
+  const browser = await launch({ ...options, ...resolved, geoip: false });
+
+  let context: BrowserContext;
+  try {
+    context = await browser.newContext({
+      ...(options.userAgent ? { userAgent: options.userAgent } : {}),
+      viewport: options.viewport ?? DEFAULT_VIEWPORT,
+      ...(options.colorScheme ? { colorScheme: options.colorScheme } : {}),
+    });
+  } catch (err) {
+    await browser.close();
+    throw err;
+  }
+
+  // Patch close() to also close the browser
+  const origClose = context.close.bind(context);
+  context.close = async () => {
+    await origClose();
+    await browser.close();
+  };
+
+  // Human-like behavioral patching
+  if (options.humanize) {
+    const { patchContext } = await import('./human/index.js');
+    const { resolveConfig } = await import('./human/config.js');
+    const cfg = resolveConfig(
+      (options.humanPreset as any) ?? 'default',
+      options.humanConfig as any,
+    );
+    patchContext(context, cfg);
+  }
+
+  return context;
+}
+
+/**
+ * Launch stealth browser with a persistent user profile (non-incognito).
+ * Uses Playwright's chromium.launchPersistentContext() under the hood.
+ *
+ * This avoids incognito detection by services like BrowserScan (-10% penalty)
+ * and enables session persistence (cookies, localStorage) across launches.
+ *
+ * @example
+ * ```ts
+ * import { launchPersistentContext } from 'cloakbrowser';
+ * const context = await launchPersistentContext({
+ *   userDataDir: './chrome-profile',
+ *   headless: false,
+ *   proxy: 'http://user:pass@host:port',
+ *   geoip: true,
+ * });
+ * const page = context.pages()[0] || await context.newPage();
+ * await page.goto('https://example.com');
+ * await context.close();
+ * ```
+ */
+export async function launchPersistentContext(
+  options: LaunchPersistentContextOptions
+): Promise<BrowserContext> {
+  options = resolveTimezone(options);
+  const { chromium } = await import("playwright-core");
+
+  const binaryPath = process.env.CLOAKBROWSER_BINARY_PATH || (await ensureBinary());
+  const resolved = await maybeResolveGeoip(options);
+  const args = buildArgs({ ...options, ...resolved });
+
+  // locale and timezone are set via binary flags (--lang, --fingerprint-timezone)
+  // — NOT via Playwright context kwargs which use detectable CDP emulation.
+  const context = await chromium.launchPersistentContext(options.userDataDir, {
+    executablePath: binaryPath,
+    headless: options.headless ?? true,
+    args,
+    ignoreDefaultArgs: IGNORE_DEFAULT_ARGS,
+    ...(options.proxy
+      ? { proxy: typeof options.proxy === "string" ? parseProxyUrl(options.proxy) : options.proxy }
+      : {}),
+    ...(options.userAgent ? { userAgent: options.userAgent } : {}),
+    viewport: options.viewport ?? DEFAULT_VIEWPORT,
+    ...(options.colorScheme ? { colorScheme: options.colorScheme } : {}),
+    ...options.launchOptions,
+  });
+
+  // Human-like behavioral patching
+  if (options.humanize) {
+    const { patchContext } = await import('./human/index.js');
+    const { resolveConfig } = await import('./human/config.js');
+    const cfg = resolveConfig(
+      (options.humanPreset as any) ?? 'default',
+      options.humanConfig as any,
+    );
+    patchContext(context, cfg);
+  }
+
+  return context;
+}
+
+// ---------------------------------------------------------------------------
+// Internal
+// ---------------------------------------------------------------------------
+
+/** @internal Exposed for unit tests only. */
+export { buildArgs as _buildArgsForTest } from "./args.js";

js/src/proxy.ts

@@ -0,0 +1,54 @@
+/**
+ * Shared proxy URL parsing for Playwright and Puppeteer wrappers.
+ */
+
+export interface ParsedProxy {
+  server: string;
+  username?: string;
+  password?: string;
+}
+
+/**
+ * Prepend http:// to schemeless proxy URLs so parsers can extract hostname.
+ * Used by geoip resolution which only needs a valid hostname, not auth fields.
+ */
+export function ensureProxyScheme(proxyUrl: string): string {
+  return proxyUrl.includes("://") ? proxyUrl : `http://${proxyUrl}`;
+}
+
+/**
+ * Parse a proxy URL, extracting credentials into separate fields.
+ *
+ * Handles: "http://user:pass@host:port" -> { server: "http://host:port", username: "user", password: "pass" }
+ * Also handles: no credentials, URL-encoded special chars, socks5://, missing port,
+ * and bare proxy strings without a scheme (e.g. "user:pass@host:port" -> treated as http).
+ */
+export function parseProxyUrl(proxy: string): ParsedProxy {
+  let url: URL;
+  // Bare format: "user:pass@host:port" — new URL() throws without a scheme.
+  const normalized =
+    proxy.includes("@") && !proxy.includes("://") ? `http://${proxy}` : proxy;
+  try {
+    url = new URL(normalized);
+  } catch {
+    // Not a parseable URL (e.g. bare "host:port") — pass through as-is
+    return { server: proxy };
+  }
+
+  if (!url.username) {
+    return { server: proxy };
+  }
+
+  // Rebuild server URL without credentials
+  const server = `${url.protocol}//${url.hostname}${url.port ? `:${url.port}` : ""}`;
+
+  const result: ParsedProxy = {
+    server,
+    username: decodeURIComponent(url.username),
+  };
+  if (url.password) {
+    result.password = decodeURIComponent(url.password);
+  }
+
+  return result;
+}

js/src/puppeteer.ts

@@ -0,0 +1,87 @@
+/**
+ * Puppeteer launch wrapper for cloakbrowser.
+ * Alternative to the Playwright wrapper for users who prefer Puppeteer.
+ */
+
+import type { Browser } from "puppeteer-core";
+import type { LaunchOptions } from "./types.js";
+import { IGNORE_DEFAULT_ARGS } from "./config.js";
+import { buildArgs } from "./args.js";
+import { ensureBinary } from "./download.js";
+import { parseProxyUrl } from "./proxy.js";
+import { maybeResolveGeoip } from "./geoip.js";
+
+/**
+ * Launch stealth Chromium browser via Puppeteer.
+ *
+ * @example
+ * ```ts
+ * import { launch } from 'cloakbrowser/puppeteer';
+ * const browser = await launch();
+ * const page = await browser.newPage();
+ * await page.goto('https://bot.incolumitas.com');
+ * console.log(await page.title());
+ * await browser.close();
+ * ```
+ */
+export async function launch(options: LaunchOptions = {}): Promise<Browser> {
+  const puppeteer = await import("puppeteer-core");
+
+  const binaryPath = process.env.CLOAKBROWSER_BINARY_PATH || (await ensureBinary());
+  const resolved = await maybeResolveGeoip(options);
+  const args = buildArgs({ ...options, ...resolved });
+
+  // Puppeteer handles proxy via CLI args, not a separate option.
+  // Chromium's --proxy-server does NOT support inline credentials,
+  // so we strip them and use page.authenticate() instead.
+  let proxyAuth: { username: string; password: string } | undefined;
+  if (options.proxy) {
+    if (typeof options.proxy === "string") {
+      const { server, username, password } = parseProxyUrl(options.proxy);
+      args.push(`--proxy-server=${server}`);
+      if (username) {
+        proxyAuth = { username, password: password ?? "" };
+      }
+    } else {
+      // Strip any inline credentials from the server URL — Chromium's
+      // --proxy-server doesn't support them; use page.authenticate() instead.
+      const parsed = parseProxyUrl(options.proxy.server);
+      args.push(`--proxy-server=${parsed.server}`);
+      if (options.proxy.bypass) {
+        args.push(`--proxy-bypass-list=${options.proxy.bypass}`);
+      }
+      // Explicit username/password fields take precedence over inline creds
+      const username = options.proxy.username ?? parsed.username;
+      const password = options.proxy.password ?? parsed.password;
+      if (username) {
+        proxyAuth = { username, password: password ?? "" };
+      }
+    }
+  }
+
+  const browser = await puppeteer.default.launch({
+    executablePath: binaryPath,
+    headless: options.headless ?? true,
+    args,
+    ignoreDefaultArgs: IGNORE_DEFAULT_ARGS,
+    ...options.launchOptions,
+  });
+
+  // Monkey-patch newPage() to auto-authenticate proxy credentials
+  if (proxyAuth) {
+    const origNewPage = browser.newPage.bind(browser);
+    const auth = proxyAuth;
+    browser.newPage = async (...pageArgs: Parameters<typeof origNewPage>) => {
+      const page = await origNewPage(...pageArgs);
+      await page.authenticate(auth);
+      return page;
+    };
+  }
+
+  return browser;
+}
+
+// ---------------------------------------------------------------------------
+// Internal
+// ---------------------------------------------------------------------------
+

js/src/types.ts

@@ -0,0 +1,60 @@
+/**
+ * Shared types for cloakbrowser launch wrappers.
+ */
+
+export interface LaunchOptions {
+  /** Run in headless mode (default: true). */
+  headless?: boolean;
+  /**
+   * Proxy server — URL string or Playwright proxy object.
+   * String: 'http://user:pass@proxy:8080' (credentials auto-extracted).
+   * Object: { server: "http://proxy:8080", bypass: ".google.com", ... }
+   *   — passed directly to Playwright.
+   */
+  proxy?: string | { server: string; bypass?: string; username?: string; password?: string };
+  /** Additional Chromium CLI arguments. */
+  args?: string[];
+  /** Include default stealth fingerprint args (default: true). Set false to use custom --fingerprint flags. */
+  stealthArgs?: boolean;
+  /** IANA timezone, e.g. "America/New_York". Sets --fingerprint-timezone binary flag. */
+  timezone?: string;
+  /** BCP 47 locale, e.g. "en-US". Sets --lang binary flag. */
+  locale?: string;
+  /** Auto-detect timezone/locale from proxy IP (requires: npm install mmdb-lib). */
+  geoip?: boolean;
+  /** Raw options passed directly to playwright/puppeteer launch(). */
+  launchOptions?: Record<string, unknown>;
+  /** Enable human-like mouse, keyboard, and scroll behavior. */
+  humanize?: boolean;
+  /** Human behavior preset: 'default' or 'careful'. */
+  humanPreset?: 'default' | 'careful';
+  /** Override individual human behavior parameters. */
+  humanConfig?: Record<string, unknown>;
+}
+
+export interface LaunchContextOptions extends LaunchOptions {
+  /** Custom user agent string. */
+  userAgent?: string;
+  /** Viewport size. */
+  viewport?: { width: number; height: number };
+  /** Browser locale, e.g. "en-US". */
+  locale?: string;
+  /** IANA timezone — alias for `timezone`. Either works. */
+  timezoneId?: string;
+  /** Color scheme preference — 'light', 'dark', or 'no-preference'. */
+  colorScheme?: "light" | "dark" | "no-preference";
+}
+
+export interface LaunchPersistentContextOptions extends LaunchContextOptions {
+  /** Path to user data directory for persistent profile. */
+  userDataDir: string;
+}
+
+export interface BinaryInfo {
+  version: string;
+  platform: string;
+  binaryPath: string;
+  installed: boolean;
+  cacheDir: string;
+  downloadUrl: string;
+}

js/tests/config.test.ts

@@ -0,0 +1,210 @@
+import { describe, it, expect } from "vitest";
+import {
+  CHROMIUM_VERSION,
+  getArchiveExt,
+  getChromiumVersion,
+  getDefaultStealthArgs,
+  getCacheDir,
+  getBinaryDir,
+  getDownloadUrl,
+  getFallbackDownloadUrl,
+} from "../src/config.js";
+import { _buildArgsForTest, resolveTimezone } from "../src/playwright.js";
+
+describe("config", () => {
+  it("CHROMIUM_VERSION matches expected format", () => {
+    expect(CHROMIUM_VERSION).toMatch(/^\d+\.\d+\.\d+\.\d+(\.\d+)?$/);
+  });
+
+  it("getDefaultStealthArgs returns expected flags", () => {
+    const args = getDefaultStealthArgs();
+    const isMac = process.platform === "darwin";
+
+    expect(args).toContain("--no-sandbox");
+    expect(args).toContain("--disable-blink-features=AutomationControlled");
+
+    if (isMac) {
+      expect(args).toContain("--fingerprint-platform=macos");
+      // macOS: no hardware-concurrency or GPU spoofing (uses native values)
+      expect(args.some((a) => a.includes("hardware-concurrency"))).toBe(false);
+    } else {
+      expect(args).toContain("--fingerprint-platform=windows");
+    }
+
+    // Should have a random fingerprint seed
+    const fingerprintArg = args.find((a) => a.startsWith("--fingerprint="));
+    expect(fingerprintArg).toBeDefined();
+    const seed = Number(fingerprintArg!.split("=")[1]);
+    expect(seed).toBeGreaterThanOrEqual(10000);
+    expect(seed).toBeLessThanOrEqual(99999);
+  });
+
+  it("getDefaultStealthArgs generates different seeds", () => {
+    const seeds = new Set<string>();
+    for (let i = 0; i < 10; i++) {
+      const args = getDefaultStealthArgs();
+      const fp = args.find((a) => a.startsWith("--fingerprint="))!;
+      seeds.add(fp);
+    }
+    // With 90k possible seeds, 10 calls should produce at least 2 unique
+    expect(seeds.size).toBeGreaterThan(1);
+  });
+
+  it("getCacheDir returns ~/.cloakbrowser by default", () => {
+    const dir = getCacheDir();
+    expect(dir).toContain(".cloakbrowser");
+  });
+
+  it("getBinaryDir includes platform version", () => {
+    const dir = getBinaryDir();
+    expect(dir).toContain(`chromium-${getChromiumVersion()}`);
+  });
+
+  it("getDownloadUrl contains platform version and platform tag", () => {
+    const url = getDownloadUrl();
+    expect(url).toContain(getChromiumVersion());
+    expect(url).toContain("cloakbrowser-");
+    expect(url).toContain(".tar.gz");
+    expect(url).toContain("cloakbrowser.dev");
+  });
+});
+
+describe("archive helpers", () => {
+  it("getArchiveExt returns correct extension for platform", () => {
+    const ext = getArchiveExt();
+    if (process.platform === "win32") {
+      expect(ext).toBe(".zip");
+    } else {
+      expect(ext).toBe(".tar.gz");
+    }
+  });
+
+  it("getFallbackDownloadUrl uses GitHub Releases", () => {
+    const url = getFallbackDownloadUrl("145.0.0.0");
+    expect(url).toContain("github.com/CloakHQ/cloakbrowser/releases/download");
+    expect(url).toContain("chromium-v145.0.0.0");
+  });
+
+  it("getFallbackDownloadUrl uses default version", () => {
+    const url = getFallbackDownloadUrl();
+    expect(url).toContain(`chromium-v${getChromiumVersion()}`);
+  });
+});
+
+describe("buildArgs timezone/locale", () => {
+  it("injects --fingerprint-timezone when timezone is set", () => {
+    const args = _buildArgsForTest({ timezone: "America/New_York" });
+    expect(args).toContain("--fingerprint-timezone=America/New_York");
+  });
+
+  it("injects --lang and --fingerprint-locale when locale is set", () => {
+    const args = _buildArgsForTest({ locale: "en-US" });
+    expect(args).toContain("--lang=en-US");
+    expect(args).toContain("--fingerprint-locale=en-US");
+  });
+
+  it("injects both when both are set", () => {
+    const args = _buildArgsForTest({ timezone: "Europe/Berlin", locale: "de-DE" });
+    expect(args).toContain("--fingerprint-timezone=Europe/Berlin");
+    expect(args).toContain("--lang=de-DE");
+    expect(args).toContain("--fingerprint-locale=de-DE");
+  });
+
+  it("injects timezone/locale even when stealthArgs=false", () => {
+    const args = _buildArgsForTest({ stealthArgs: false, timezone: "America/New_York", locale: "en-US" });
+    expect(args).toContain("--fingerprint-timezone=America/New_York");
+    expect(args).toContain("--lang=en-US");
+    expect(args).toContain("--fingerprint-locale=en-US");
+    expect(args.some(a => a.startsWith("--fingerprint="))).toBe(false);
+  });
+
+  it("does not inject flags when not set", () => {
+    const args = _buildArgsForTest({});
+    expect(args.some(a => a.startsWith("--fingerprint-timezone="))).toBe(false);
+    expect(args.some(a => a.startsWith("--lang="))).toBe(false);
+    expect(args.some(a => a.startsWith("--fingerprint-locale="))).toBe(false);
+  });
+});
+
+describe("buildArgs deduplication", () => {
+  it("user --fingerprint overrides default seed", () => {
+    const args = _buildArgsForTest({ args: ["--fingerprint=99887"] });
+    const fpArgs = args.filter(a => a.startsWith("--fingerprint="));
+    expect(fpArgs).toHaveLength(1);
+    expect(fpArgs[0]).toBe("--fingerprint=99887");
+  });
+
+  it("user --fingerprint-platform overrides default", () => {
+    const args = _buildArgsForTest({ args: ["--fingerprint-platform=linux"] });
+    const platArgs = args.filter(a => a.startsWith("--fingerprint-platform="));
+    expect(platArgs).toHaveLength(1);
+    expect(platArgs[0]).toBe("--fingerprint-platform=linux");
+  });
+
+  it("timezone param overrides user --fingerprint-timezone arg", () => {
+    const args = _buildArgsForTest({
+      args: ["--fingerprint-timezone=Europe/London"],
+      timezone: "America/New_York",
+    });
+    const tzArgs = args.filter(a => a.startsWith("--fingerprint-timezone="));
+    expect(tzArgs).toHaveLength(1);
+    expect(tzArgs[0]).toBe("--fingerprint-timezone=America/New_York");
+  });
+
+  it("locale param overrides user --lang and --fingerprint-locale args", () => {
+    const args = _buildArgsForTest({
+      args: ["--lang=de-DE", "--fingerprint-locale=de-DE"],
+      locale: "en-US",
+    });
+    const langArgs = args.filter(a => a.startsWith("--lang="));
+    expect(langArgs).toHaveLength(1);
+    expect(langArgs[0]).toBe("--lang=en-US");
+    const localeArgs = args.filter(a => a.startsWith("--fingerprint-locale="));
+    expect(localeArgs).toHaveLength(1);
+    expect(localeArgs[0]).toBe("--fingerprint-locale=en-US");
+  });
+
+  it("no duplicate flag keys in output", () => {
+    const args = _buildArgsForTest({
+      args: ["--fingerprint=99887", "--fingerprint-timezone=UTC", "--lang=fr-FR"],
+      timezone: "Europe/Berlin",
+      locale: "de-DE",
+    });
+    const keys = args.map(a => a.split("=")[0]);
+    expect(new Set(keys).size).toBe(keys.length);
+  });
+
+  it("non-value flags preserved without dedup issues", () => {
+    const args = _buildArgsForTest({ args: ["--disable-gpu", "--no-zygote"] });
+    expect(args).toContain("--disable-gpu");
+    expect(args).toContain("--no-zygote");
+    expect(args).toContain("--no-sandbox");
+  });
+});
+
+describe("resolveTimezone alias", () => {
+  it("resolves timezoneId to timezone", () => {
+    const result = resolveTimezone({ timezoneId: "Europe/Paris" });
+    expect(result.timezone).toBe("Europe/Paris");
+    expect(result).not.toHaveProperty("timezoneId");
+  });
+
+  it("preserves explicit timezone over timezoneId", () => {
+    const result = resolveTimezone({ timezone: "UTC", timezoneId: "Europe/Paris" });
+    expect(result.timezone).toBe("UTC");
+    expect(result).not.toHaveProperty("timezoneId");
+  });
+
+  it("returns options unchanged when no timezoneId", () => {
+    const opts = { timezone: "UTC" };
+    const result = resolveTimezone(opts);
+    expect(result).toBe(opts); // same reference, no copy
+    expect(result.timezone).toBe("UTC");
+  });
+
+  it("returns options unchanged when neither is set", () => {
+    const opts = {};
+    const result = resolveTimezone(opts);
+    expect(result).toBe(opts);
+  });
+});

js/tests/geoip.test.ts

@@ -0,0 +1,56 @@
+import { describe, it, expect } from "vitest";
+import { COUNTRY_LOCALE_MAP, resolveProxyIp } from "../src/geoip.js";
+
+describe("resolveProxyIp", () => {
+  it("returns literal IPv4 from proxy URL", async () => {
+    expect(await resolveProxyIp("http://10.50.96.5:8888")).toBe("10.50.96.5");
+  });
+
+  it("handles proxy URL with credentials", async () => {
+    expect(await resolveProxyIp("http://user:pass@10.50.96.5:8888")).toBe(
+      "10.50.96.5"
+    );
+  });
+
+  it("resolves localhost", async () => {
+    const ip = await resolveProxyIp("http://localhost:8888");
+    expect(ip).toBeTruthy();
+    expect(["127.0.0.1", "::1"]).toContain(ip);
+  });
+
+  it("returns null for invalid URL", async () => {
+    expect(await resolveProxyIp("not-a-url")).toBeNull();
+  });
+
+  it("returns null for empty string", async () => {
+    expect(await resolveProxyIp("")).toBeNull();
+  });
+
+  it("returns null for schemeless proxy (shows why normalization is needed)", async () => {
+    // no scheme — new URL() gives empty hostname for both bare formats
+    expect(await resolveProxyIp("user:pass@10.50.96.5:8888")).toBeNull();
+    expect(await resolveProxyIp("10.50.96.5:8888")).toBeNull();
+  });
+
+  it("extracts IP after normalization (http:// prepended by maybeResolveGeoip)", async () => {
+    expect(await resolveProxyIp("http://user:pass@10.50.96.5:8888")).toBe("10.50.96.5");
+    expect(await resolveProxyIp("http://10.50.96.5:8888")).toBe("10.50.96.5");
+  });
+});
+
+describe("COUNTRY_LOCALE_MAP", () => {
+  it("contains common countries", () => {
+    for (const code of ["US", "GB", "DE", "FR", "JP", "BR", "IL", "RU"]) {
+      expect(COUNTRY_LOCALE_MAP[code]).toBeDefined();
+    }
+  });
+
+  it("values are BCP 47 language-REGION format", () => {
+    for (const [code, locale] of Object.entries(COUNTRY_LOCALE_MAP)) {
+      const parts = locale.split("-");
+      expect(parts).toHaveLength(2);
+      expect(parts[0]).toMatch(/^[a-z]{2,3}$/);
+      expect(parts[1]).toMatch(/^[A-Z]{2}$/);
+    }
+  });
+});

js/tests/humanize.test.ts

@@ -0,0 +1,627 @@
+import { describe, it, expect, vi } from "vitest";
+import { resolveConfig, rand, randRange, sleep } from "../src/human/config.js";
+import { humanMove, humanClick, clickTarget, humanIdle } from "../src/human/mouse.js";
+
+// =========================================================================
+// Config resolution
+// =========================================================================
+describe("resolveConfig", () => {
+  it("returns valid default config", () => {
+    const cfg = resolveConfig("default");
+    expect(cfg).toBeDefined();
+    expect(cfg.mouse_min_steps).toBeGreaterThan(0);
+    expect(cfg.mouse_max_steps).toBeGreaterThan(cfg.mouse_min_steps);
+    expect(cfg.typing_delay).toBeGreaterThan(0);
+    expect(cfg.initial_cursor_x).toHaveLength(2);
+    expect(cfg.initial_cursor_y).toHaveLength(2);
+  });
+
+  it("returns valid careful config with slower typing", () => {
+    const cfg = resolveConfig("careful");
+    const def = resolveConfig("default");
+    expect(cfg).toBeDefined();
+    expect(cfg.typing_delay).toBeGreaterThanOrEqual(def.typing_delay);
+  });
+
+  it("applies custom overrides", () => {
+    const cfg = resolveConfig("default", { mouse_min_steps: 100, mouse_max_steps: 200 });
+    expect(cfg.mouse_min_steps).toBe(100);
+    expect(cfg.mouse_max_steps).toBe(200);
+  });
+
+  it("preserves idle_between_actions override", () => {
+    const cfg = resolveConfig("default", {
+      idle_between_actions: true,
+      idle_between_duration: [50, 100],
+    });
+    expect(cfg.idle_between_actions).toBe(true);
+    expect(cfg.idle_between_duration[0]).toBe(50);
+    expect(cfg.idle_between_duration[1]).toBe(100);
+  });
+
+  it("throws on unknown preset name", () => {
+    expect(() => resolveConfig("nonexistent" as any)).toThrow(/Unknown humanize preset/);
+  });
+
+  it("returns all required fields including mistype", () => {
+    const cfg = resolveConfig("default");
+    const required = [
+      "mouse_min_steps", "mouse_max_steps", "typing_delay",
+      "initial_cursor_x", "initial_cursor_y", "idle_between_actions",
+      "idle_between_duration", "field_switch_delay",
+      "mistype_chance", "mistype_delay_notice", "mistype_delay_correct",
+    ];
+    for (const f of required) {
+      expect(cfg).toHaveProperty(f);
+    }
+  });
+
+  it("mistype_delay fields are [min, max] tuples", () => {
+    const cfg = resolveConfig("default");
+    expect(Array.isArray(cfg.mistype_delay_notice)).toBe(true);
+    expect(cfg.mistype_delay_notice).toHaveLength(2);
+    expect(cfg.mistype_delay_notice[0]).toBeLessThanOrEqual(cfg.mistype_delay_notice[1]);
+    expect(Array.isArray(cfg.mistype_delay_correct)).toBe(true);
+    expect(cfg.mistype_delay_correct).toHaveLength(2);
+    expect(cfg.mistype_delay_correct[0]).toBeLessThanOrEqual(cfg.mistype_delay_correct[1]);
+  });
+});
+
+// =========================================================================
+// rand / randRange / sleep
+// =========================================================================
+describe("rand helpers", () => {
+  it("rand stays within bounds over many iterations", () => {
+    for (let i = 0; i < 500; i++) {
+      const v = rand(10, 20);
+      expect(v).toBeGreaterThanOrEqual(10);
+      expect(v).toBeLessThanOrEqual(20);
+    }
+  });
+
+  it("randRange stays within bounds", () => {
+    for (let i = 0; i < 500; i++) {
+      const v = randRange([5, 15]);
+      expect(v).toBeGreaterThanOrEqual(5);
+      expect(v).toBeLessThanOrEqual(15);
+    }
+  });
+
+  it("sleep pauses for approximately correct duration", async () => {
+    const t0 = Date.now();
+    await sleep(50);
+    const elapsed = Date.now() - t0;
+    expect(elapsed).toBeGreaterThanOrEqual(40);
+    expect(elapsed).toBeLessThan(200);
+  });
+});
+
+// =========================================================================
+// Bézier mouse movement (behavioral with vi.fn mocks)
+// =========================================================================
+describe("humanMove", () => {
+  function makeFakeRaw() {
+    const moves: Array<{ x: number; y: number }> = [];
+    return {
+      raw: {
+        move: vi.fn(async (x: number, y: number) => { moves.push({ x, y }); }),
+        down: vi.fn(async () => {}),
+        up: vi.fn(async () => {}),
+        wheel: vi.fn(async () => {}),
+      },
+      moves,
+    };
+  }
+
+  it("generates multiple intermediate points", async () => {
+    const cfg = resolveConfig("default");
+    const { raw, moves } = makeFakeRaw();
+    await humanMove(raw, 0, 0, 500, 300, cfg);
+    expect(moves.length).toBeGreaterThanOrEqual(10);
+    const last = moves[moves.length - 1];
+    expect(Math.abs(last.x - 500)).toBeLessThan(10);
+    expect(Math.abs(last.y - 300)).toBeLessThan(10);
+  });
+
+  it("raw.move called exactly once per step", async () => {
+    const cfg = resolveConfig("default");
+    const { raw, moves } = makeFakeRaw();
+    await humanMove(raw, 0, 0, 400, 400, cfg);
+    expect(raw.move).toHaveBeenCalledTimes(moves.length);
+  });
+
+  it("no single jump exceeds 50% of total distance", async () => {
+    const cfg = resolveConfig("default");
+    const { raw, moves } = makeFakeRaw();
+    await humanMove(raw, 0, 0, 400, 400, cfg);
+    const totalDist = Math.sqrt(400 ** 2 + 400 ** 2);
+    const maxJump = totalDist * 0.5;
+    for (let i = 1; i < moves.length; i++) {
+      const dx = moves[i].x - moves[i - 1].x;
+      const dy = moves[i].y - moves[i - 1].y;
+      expect(Math.sqrt(dx * dx + dy * dy)).toBeLessThan(maxJump);
+    }
+  });
+
+  it("produces curved path (not a straight line)", async () => {
+    const cfg = resolveConfig("default");
+    let maxDev = 0;
+    for (let trial = 0; trial < 10; trial++) {
+      const { raw, moves } = makeFakeRaw();
+      await humanMove(raw, 0, 0, 500, 0, cfg);
+      const dev = Math.max(...moves.map(m => Math.abs(m.y)));
+      if (dev > maxDev) maxDev = dev;
+    }
+    expect(maxDev).toBeGreaterThan(0.5);
+  });
+
+  it("handles very short distances", async () => {
+    const cfg = resolveConfig("default");
+    const { raw, moves } = makeFakeRaw();
+    await humanMove(raw, 100, 100, 103, 102, cfg);
+    expect(moves.length).toBeGreaterThanOrEqual(1);
+  });
+
+  it("handles zero distance without crashing", async () => {
+    const cfg = resolveConfig("default");
+    const { raw } = makeFakeRaw();
+    await humanMove(raw, 200, 200, 200, 200, cfg);
+    // Completes without error; may or may not call move (both valid)
+    expect(true).toBe(true);
+  });
+});
+
+// =========================================================================
+// humanClick behavioral
+// =========================================================================
+describe("humanClick", () => {
+  it("calls down then up in correct order", async () => {
+    const cfg = resolveConfig("default");
+    const callOrder: string[] = [];
+    const raw = {
+      move: vi.fn(async () => {}),
+      down: vi.fn(async () => { callOrder.push("down"); }),
+      up: vi.fn(async () => { callOrder.push("up"); }),
+      wheel: vi.fn(async () => {}),
+    };
+    await humanClick(raw, false, cfg);
+    expect(raw.down).toHaveBeenCalledTimes(1);
+    expect(raw.up).toHaveBeenCalledTimes(1);
+    expect(callOrder).toEqual(["down", "up"]);
+  });
+});
+
+// =========================================================================
+// humanIdle behavioral
+// =========================================================================
+describe("humanIdle", () => {
+  it("calls raw.move at least once during idle", async () => {
+    const cfg = resolveConfig("default");
+    const raw = {
+      move: vi.fn(async () => {}),
+      down: vi.fn(async () => {}),
+      up: vi.fn(async () => {}),
+      wheel: vi.fn(async () => {}),
+    };
+    await humanIdle(raw, 10, 100, 100, cfg);
+    expect(raw.move).toHaveBeenCalled();
+  }, 15000);
+});
+
+// =========================================================================
+// clickTarget
+// =========================================================================
+describe("clickTarget", () => {
+  it("returns point within bounding box", () => {
+    const cfg = resolveConfig("default");
+    const box = { x: 100, y: 200, width: 150, height: 40 };
+    for (let i = 0; i < 100; i++) {
+      const t = clickTarget(box, false, cfg);
+      expect(t.x).toBeGreaterThanOrEqual(100);
+      expect(t.x).toBeLessThanOrEqual(250);
+      expect(t.y).toBeGreaterThanOrEqual(200);
+      expect(t.y).toBeLessThanOrEqual(240);
+    }
+  });
+
+  it("isInput=true biases click toward left side of box", () => {
+    const cfg = resolveConfig("default");
+    const box = { x: 50, y: 50, width: 200, height: 30 };
+    let sumX = 0;
+    const N = 300;
+    for (let i = 0; i < N; i++) {
+      const t = clickTarget(box, true, cfg);
+      expect(t.x).toBeGreaterThanOrEqual(50);
+      expect(t.x).toBeLessThanOrEqual(250);
+      sumX += t.x;
+    }
+    const avgX = sumX / N;
+    expect(avgX).toBeLessThan(175);
+  });
+
+  it("does not crash with 1x1 box", () => {
+    const cfg = resolveConfig("default");
+    const t = clickTarget({ x: 0, y: 0, width: 1, height: 1 }, false, cfg);
+    expect(t.x).toBeGreaterThanOrEqual(0);
+    expect(t.x).toBeLessThanOrEqual(1);
+  });
+});
+
+// =========================================================================
+// patchPage behavioral: fill uses platform SELECT_ALL
+// =========================================================================
+describe("patchPage fill", () => {
+  it("fill calls keyboard.press with platform-correct select-all", async () => {
+    const { patchPage } = await import("../src/human/index.js");
+
+    const pressedKeys: string[] = [];
+    const page = buildMockPage({
+      keyboardPress: async (key: string) => { pressedKeys.push(key); },
+      evaluate: async () => false,
+    });
+
+    const cfg = resolveConfig("default");
+    const cursor = { x: 0, y: 0, initialized: false };
+    patchPage(page as any, cfg, cursor as any);
+
+    try { await (page as any).fill("input#name", "hello"); } catch (_) {}
+
+    const expected = process.platform === "darwin" ? "Meta+a" : "Control+a";
+    const wrong = process.platform === "darwin" ? "Control+a" : "Meta+a";
+    if (pressedKeys.length > 0) {
+      expect(pressedKeys).toContain(expected);
+      expect(pressedKeys).not.toContain(wrong);
+    }
+  }, 30000);
+});
+
+
+// =========================================================================
+// patchPage behavioral: check/uncheck with idle_between_actions
+// =========================================================================
+describe("patchPage check/uncheck idle", () => {
+  it("check with idle=true calls humanClickFn and does not crash on idle", async () => {
+    const { patchPage } = await import("../src/human/index.js");
+
+    let downCalled = false;
+    const page = buildMockPage({
+      isChecked: async () => false,
+      evaluate: async () => false,
+    });
+    page.mouse.down = vi.fn(async () => { downCalled = true; });
+
+    const cfg = resolveConfig("default", {
+      idle_between_actions: true,
+      idle_between_duration: [1, 2],
+    });
+    const cursor = { x: 100, y: 100, initialized: true };
+    patchPage(page as any, cfg, cursor as any);
+
+    try { await (page as any).check("input#cb"); } catch (_) {}
+
+    // humanCheckFn → humanIdle → humanClickFn → humanClick → raw.down
+    expect(downCalled).toBe(true);
+  }, 30000);
+
+  it("uncheck with idle=true calls humanClickFn and does not crash on idle", async () => {
+    const { patchPage } = await import("../src/human/index.js");
+
+    let downCalled = false;
+    const page = buildMockPage({
+      isChecked: async () => true,
+      evaluate: async () => false,
+    });
+    page.mouse.down = vi.fn(async () => { downCalled = true; });
+
+    const cfg = resolveConfig("default", {
+      idle_between_actions: true,
+      idle_between_duration: [1, 2],
+    });
+    const cursor = { x: 100, y: 100, initialized: true };
+    patchPage(page as any, cfg, cursor as any);
+
+    try { await (page as any).uncheck("input#cb"); } catch (_) {}
+
+    expect(downCalled).toBe(true);
+  }, 30000);
+
+  it("config with idle=true is accepted by resolveConfig", () => {
+    const cfg = resolveConfig("default", {
+      idle_between_actions: true,
+      idle_between_duration: [5, 10],
+    });
+    expect(cfg.idle_between_actions).toBe(true);
+    expect(cfg.idle_between_duration).toEqual([5, 10]);
+  });
+});
+
+// =========================================================================
+// patchPage behavioral: press focus check
+// =========================================================================
+describe("patchPage press focus", () => {
+  it("press clicks element when NOT focused (mouse.down called)", async () => {
+    const { patchPage } = await import("../src/human/index.js");
+
+    let downCount = 0;
+    const page = buildMockPage({
+      evaluate: async () => false,
+    });
+    // Intercept mouse.down before patching so raw captures it
+    page.mouse.down = vi.fn(async () => { downCount++; });
+
+    const cfg = resolveConfig("default");
+    const cursor = { x: 50, y: 50, initialized: true };
+    patchPage(page as any, cfg, cursor as any);
+
+    try { await (page as any).press("input#field", "Enter"); } catch (_) {}
+
+    expect(downCount).toBeGreaterThan(0);
+  });
+
+  it("press skips click when element IS focused (no mouse.down)", async () => {
+    const { patchPage } = await import("../src/human/index.js");
+
+    let downCount = 0;
+    const page = buildMockPage({
+      evaluate: async () => true,
+    });
+    page.mouse.down = vi.fn(async () => { downCount++; });
+
+    const cfg = resolveConfig("default");
+    const cursor = { x: 50, y: 50, initialized: true };
+    patchPage(page as any, cfg, cursor as any);
+
+    try { await (page as any).press("input#field", "Enter"); } catch (_) {}
+
+    expect(downCount).toBe(0);
+  });
+});
+
+// =========================================================================
+// patchPage behavioral: frame patching
+// =========================================================================
+describe("patchPage frame patching", () => {
+  it("patches child frames with _humanPatched flag", async () => {
+    const { patchPage } = await import("../src/human/index.js");
+
+    const childFrame = buildMockFrame();
+    const mainFrame = {
+      ...buildMockFrame(),
+      childFrames: vi.fn(() => [childFrame]),
+    };
+
+    const page = buildMockPage({ mainFrameReturn: mainFrame });
+    const cfg = resolveConfig("default");
+    const cursor = { x: 0, y: 0, initialized: false };
+    patchPage(page as any, cfg, cursor as any);
+
+    expect((childFrame as any)._humanPatched).toBe(true);
+  });
+});
+
+// =========================================================================
+// Mistype config
+// =========================================================================
+describe("mistype config", () => {
+  it("default config has valid mistype fields", () => {
+    const cfg = resolveConfig("default");
+    expect(typeof cfg.mistype_chance).toBe("number");
+    expect(cfg.mistype_chance).toBeGreaterThanOrEqual(0);
+    expect(cfg.mistype_chance).toBeLessThanOrEqual(1);
+    // mistype_delay_notice and mistype_delay_correct are [min, max] tuples
+    expect(Array.isArray(cfg.mistype_delay_notice)).toBe(true);
+    expect(cfg.mistype_delay_notice).toHaveLength(2);
+    expect(Array.isArray(cfg.mistype_delay_correct)).toBe(true);
+    expect(cfg.mistype_delay_correct).toHaveLength(2);
+  });
+
+  it("mistype_chance can be overridden to 0 (disabled)", () => {
+    const cfg = resolveConfig("default", { mistype_chance: 0 });
+    expect(cfg.mistype_chance).toBe(0);
+  });
+
+  it("mistype_chance can be overridden to higher value", () => {
+    const cfg = resolveConfig("default", { mistype_chance: 0.15 });
+    expect(cfg.mistype_chance).toBe(0.15);
+  });
+});
+
+// =========================================================================
+// Module exports
+// =========================================================================
+describe("module exports", () => {
+  it("patchBrowser, patchContext, patchPage are all exported functions", async () => {
+    const mod = await import("../src/human/index.js");
+    expect(typeof mod.patchBrowser).toBe("function");
+    expect(typeof mod.patchContext).toBe("function");
+    expect(typeof mod.patchPage).toBe("function");
+  });
+
+  it("humanMove, humanClick, clickTarget, humanIdle are exported", async () => {
+    const mod = await import("../src/human/index.js");
+    expect(typeof mod.humanMove).toBe("function");
+    expect(typeof mod.humanClick).toBe("function");
+    expect(typeof mod.clickTarget).toBe("function");
+    expect(typeof mod.humanIdle).toBe("function");
+  });
+
+  it("resolveConfig is re-exported from index", async () => {
+    const mod = await import("../src/human/index.js");
+    expect(typeof mod.resolveConfig).toBe("function");
+  });
+});
+
+// =========================================================================
+// Test helpers
+// =========================================================================
+
+function buildMockPage(overrides: Record<string, any> = {}): any {
+  const mainFrameObj = overrides.mainFrameReturn ?? {
+    childFrames: vi.fn(() => []),
+    click: vi.fn(async () => {}),
+    dblclick: vi.fn(async () => {}),
+    hover: vi.fn(async () => {}),
+    type: vi.fn(async () => {}),
+    fill: vi.fn(async () => {}),
+    check: vi.fn(async () => {}),
+    uncheck: vi.fn(async () => {}),
+    selectOption: vi.fn(async () => {}),
+    press: vi.fn(async () => {}),
+    clear: vi.fn(async () => {}),
+    dragAndDrop: vi.fn(async () => {}),
+    locator: vi.fn(() => ({
+      boundingBox: vi.fn(async () => ({ x: 0, y: 0, width: 100, height: 30 })),
+      first: vi.fn(function(this: any) { return this; }),
+    })),
+  };
+
+  const makeLocator = () => {
+    const loc: any = {
+      boundingBox: vi.fn(async () => ({ x: 100, y: 100, width: 200, height: 30 })),
+      scrollIntoViewIfNeeded: vi.fn(async () => {}),
+      isChecked: overrides.isChecked ?? vi.fn(async () => false),
+    };
+    loc.first = vi.fn(() => loc);
+    return loc;
+  };
+
+  const page: any = {
+    evaluate: overrides.evaluate ?? vi.fn(async () => false),
+    addInitScript: vi.fn(async () => {}),
+    mouse: {
+      move: vi.fn(async () => {}),
+      down: vi.fn(async () => {}),
+      up: vi.fn(async () => {}),
+      click: vi.fn(async () => {}),
+      dblclick: vi.fn(async () => {}),
+      wheel: vi.fn(async () => {}),
+    },
+    keyboard: {
+      press: overrides.keyboardPress
+        ? vi.fn(overrides.keyboardPress)
+        : vi.fn(async () => {}),
+      type: vi.fn(async () => {}),
+      down: vi.fn(async () => {}),
+      up: vi.fn(async () => {}),
+      insertText: vi.fn(async () => {}),
+    },
+    click: vi.fn(async () => {}),
+    dblclick: vi.fn(async () => {}),
+    hover: vi.fn(async () => {}),
+    type: vi.fn(async () => {}),
+    fill: vi.fn(async () => {}),
+    check: vi.fn(async () => {}),
+    uncheck: vi.fn(async () => {}),
+    selectOption: vi.fn(async () => {}),
+    press: vi.fn(async () => {}),
+    goto: vi.fn(async () => ({})),
+    isChecked: overrides.isChecked ?? vi.fn(async () => false),
+    locator: vi.fn(() => makeLocator()),
+    viewportSize: vi.fn(() => ({ width: 1280, height: 720 })),
+    mainFrame: vi.fn(() => mainFrameObj),
+    frames: vi.fn(() => []),
+    context: vi.fn(() => ({
+      pages: vi.fn(() => []),
+      addInitScript: vi.fn(async () => {}),
+    })),
+    url: vi.fn(() => "about:blank"),
+    waitForTimeout: vi.fn(async () => {}),
+  };
+  return page;
+}
+
+// =========================================================================
+// humanType non-ASCII
+// =========================================================================
+describe("humanType non-ASCII", () => {
+  function makeRawKeyboardMock() {
+    const downKeys: string[] = [];
+    const insertedChars: string[] = [];
+    const raw = {
+      down: vi.fn(async (k: string) => { downKeys.push(k); }),
+      up: vi.fn(async () => {}),
+      type: vi.fn(async () => {}),
+      insertText: vi.fn(async (t: string) => { insertedChars.push(t); }),
+    };
+    return { raw, downKeys, insertedChars };
+  }
+
+  it("types Cyrillic via insertText, not down", async () => {
+    const { humanType } = await import("../src/human/keyboard.js");
+    const cfg = resolveConfig("default", { mistype_chance: 0 });
+    const { raw, downKeys, insertedChars } = makeRawKeyboardMock();
+
+    await humanType({} as any, raw, "Привет", cfg);
+
+    expect(insertedChars.join("")).toBe("Привет");
+    for (const k of downKeys) {
+      expect(k.charCodeAt(0)).toBeLessThan(128);
+    }
+  });
+
+  it("types mixed ASCII + Cyrillic correctly", async () => {
+    const { humanType } = await import("../src/human/keyboard.js");
+    const cfg = resolveConfig("default", { mistype_chance: 0 });
+    const { raw, downKeys, insertedChars } = makeRawKeyboardMock();
+
+    await humanType({} as any, raw, "Hi Мир", cfg);
+
+    expect(downKeys).toContain("H");
+    expect(downKeys).toContain("i");
+    expect(insertedChars.join("")).toContain("М");
+    expect(insertedChars.join("")).toContain("и");
+    expect(insertedChars.join("")).toContain("р");
+  });
+
+  it("types CJK via insertText", async () => {
+    const { humanType } = await import("../src/human/keyboard.js");
+    const cfg = resolveConfig("default", { mistype_chance: 0 });
+    const { raw, insertedChars } = makeRawKeyboardMock();
+
+    await humanType({} as any, raw, "你好", cfg);
+
+    expect(insertedChars.join("")).toBe("你好");
+  });
+
+  it("types emoji via insertText", async () => {
+    const { humanType } = await import("../src/human/keyboard.js");
+    const cfg = resolveConfig("default", { mistype_chance: 0 });
+    const { raw, insertedChars } = makeRawKeyboardMock();
+
+    await humanType({} as any, raw, "Hi 👋", cfg);
+
+    expect(insertedChars.join("")).toContain("👋");
+  });
+
+  it("mistype only triggers for ASCII, not Cyrillic", async () => {
+    const { humanType } = await import("../src/human/keyboard.js");
+    const cfg = resolveConfig("default", { mistype_chance: 1.0 });
+    const { raw, downKeys } = makeRawKeyboardMock();
+
+    await humanType({} as any, raw, "AБ", cfg);
+
+    expect(downKeys).toContain("Backspace");
+  });
+});
+
+
+
+function buildMockFrame(): any {
+  return {
+    click: vi.fn(async () => {}),
+    dblclick: vi.fn(async () => {}),
+    hover: vi.fn(async () => {}),
+    type: vi.fn(async () => {}),
+    fill: vi.fn(async () => {}),
+    check: vi.fn(async () => {}),
+    uncheck: vi.fn(async () => {}),
+    selectOption: vi.fn(async () => {}),
+    press: vi.fn(async () => {}),
+    clear: vi.fn(async () => {}),
+    dragAndDrop: vi.fn(async () => {}),
+    locator: vi.fn(() => ({
+      boundingBox: vi.fn(async () => ({ x: 0, y: 0, width: 100, height: 30 })),
+    })),
+    childFrames: vi.fn(() => []),
+  };
+}

js/tests/launch.test.ts

@@ -0,0 +1,210 @@
+import { describe, it, expect, vi, afterEach, beforeEach } from "vitest";
+import { binaryInfo } from "../src/download.js";
+import { DEFAULT_VIEWPORT, getChromiumVersion } from "../src/config.js";
+
+describe("binaryInfo", () => {
+  it("returns correct structure", () => {
+    const info = binaryInfo();
+
+    expect(info.version).toBe(getChromiumVersion());
+    expect(info.platform).toMatch(/^(linux|darwin|windows)-(x64|arm64)$/);
+    expect(info.binaryPath).toBeTruthy();
+    expect(typeof info.installed).toBe("boolean");
+    expect(info.cacheDir).toContain("cloakbrowser");
+    expect(info.downloadUrl).toContain(".tar.gz");
+  });
+});
+
+// Integration tests require the binary — run with:
+//   CLOAKBROWSER_BINARY_PATH=/path/to/chrome npm test
+describe.skipIf(!process.env.CLOAKBROWSER_BINARY_PATH)(
+  "launch (integration)",
+  () => {
+    it("launches browser and checks stealth", async () => {
+      const { launch } = await import("../src/playwright.js");
+
+      const browser = await launch({ headless: true });
+      const page = await browser.newPage();
+      await page.goto("about:blank");
+
+      const webdriver = await page.evaluate(() => navigator.webdriver);
+      expect(webdriver).toBeFalsy();
+
+      const plugins = await page.evaluate(() => navigator.plugins.length);
+      expect(plugins).toBeGreaterThan(0);
+
+      await browser.close();
+    }, 30_000);
+  }
+);
+
+// ---------------------------------------------------------------------------
+// launchContext / launchPersistentContext unit tests (mock playwright-core)
+// ---------------------------------------------------------------------------
+
+describe("launchContext (unit)", () => {
+  let mockContext: any;
+  let mockBrowser: any;
+  let mockChromium: any;
+  const origEnv = process.env.CLOAKBROWSER_BINARY_PATH;
+
+  beforeEach(() => {
+    process.env.CLOAKBROWSER_BINARY_PATH = "/fake/chrome";
+    const origClose = vi.fn();
+    mockContext = { close: origClose, _origClose: origClose };
+    mockBrowser = {
+      newContext: vi.fn().mockResolvedValue(mockContext),
+      close: vi.fn(),
+    };
+    mockChromium = { launch: vi.fn().mockResolvedValue(mockBrowser) };
+
+    vi.doMock("playwright-core", () => ({ chromium: mockChromium }));
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+    vi.resetModules();
+    if (origEnv) {
+      process.env.CLOAKBROWSER_BINARY_PATH = origEnv;
+    } else {
+      delete process.env.CLOAKBROWSER_BINARY_PATH;
+    }
+  });
+
+  it("applies DEFAULT_VIEWPORT when no viewport given", async () => {
+    const { launchContext } = await import("../src/playwright.js");
+    await launchContext();
+
+    const ctxArgs = mockBrowser.newContext.mock.calls[0][0];
+    expect(ctxArgs.viewport).toEqual(DEFAULT_VIEWPORT);
+  });
+
+  it("uses custom viewport when provided", async () => {
+    const { launchContext } = await import("../src/playwright.js");
+    const custom = { width: 1280, height: 720 };
+    await launchContext({ viewport: custom });
+
+    const ctxArgs = mockBrowser.newContext.mock.calls[0][0];
+    expect(ctxArgs.viewport).toEqual(custom);
+  });
+
+  it("forwards userAgent to newContext", async () => {
+    const { launchContext } = await import("../src/playwright.js");
+    await launchContext({ userAgent: "Custom/1.0" });
+
+    const ctxArgs = mockBrowser.newContext.mock.calls[0][0];
+    expect(ctxArgs.userAgent).toBe("Custom/1.0");
+  });
+
+  it("passes timezone via binary flag, not CDP context", async () => {
+    const { launchContext } = await import("../src/playwright.js");
+    await launchContext({ timezone: "America/New_York" });
+
+    // launch() called with --fingerprint-timezone binary flag
+    const launchArgs = mockChromium.launch.mock.calls[0][0];
+    const hasTimezoneFlag = launchArgs.args.some((a: string) =>
+      a.startsWith("--fingerprint-timezone=America/New_York")
+    );
+    expect(hasTimezoneFlag).toBe(true);
+
+    // NOT in newContext() — no CDP emulation
+    const ctxArgs = mockBrowser.newContext.mock.calls[0][0];
+    expect(ctxArgs.timezoneId).toBeUndefined();
+  });
+
+  it("forwards colorScheme to newContext", async () => {
+    const { launchContext } = await import("../src/playwright.js");
+    await launchContext({ colorScheme: "dark" });
+
+    const ctxArgs = mockBrowser.newContext.mock.calls[0][0];
+    expect(ctxArgs.colorScheme).toBe("dark");
+  });
+
+  it("close() also closes browser", async () => {
+    const { launchContext } = await import("../src/playwright.js");
+    const ctx = await launchContext();
+
+    await ctx.close();
+    // Original context close called
+    expect(mockContext._origClose).toHaveBeenCalledOnce();
+    // Browser also closed
+    expect(mockBrowser.close).toHaveBeenCalledOnce();
+  });
+});
+
+describe("launchPersistentContext (unit)", () => {
+  let mockContext: any;
+  let mockChromium: any;
+  const origEnv = process.env.CLOAKBROWSER_BINARY_PATH;
+
+  beforeEach(() => {
+    process.env.CLOAKBROWSER_BINARY_PATH = "/fake/chrome";
+    mockContext = { close: vi.fn(), pages: vi.fn().mockReturnValue([]) };
+    mockChromium = {
+      launchPersistentContext: vi.fn().mockResolvedValue(mockContext),
+    };
+
+    vi.doMock("playwright-core", () => ({ chromium: mockChromium }));
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+    vi.resetModules();
+    if (origEnv) {
+      process.env.CLOAKBROWSER_BINARY_PATH = origEnv;
+    } else {
+      delete process.env.CLOAKBROWSER_BINARY_PATH;
+    }
+  });
+
+  it("applies DEFAULT_VIEWPORT", async () => {
+    const { launchPersistentContext } = await import("../src/playwright.js");
+    await launchPersistentContext({ userDataDir: "/tmp/profile" });
+
+    const args = mockChromium.launchPersistentContext.mock.calls[0][1];
+    expect(args.viewport).toEqual(DEFAULT_VIEWPORT);
+  });
+
+  it("passes timezone and locale via binary args, not CDP context", async () => {
+    const { launchPersistentContext } = await import("../src/playwright.js");
+    await launchPersistentContext({
+      userDataDir: "/tmp/profile",
+      timezone: "Asia/Tokyo",
+      locale: "ja-JP",
+    });
+
+    const args = mockChromium.launchPersistentContext.mock.calls[0][1];
+    // Binary args (native, undetectable)
+    expect(args.args).toContain("--fingerprint-timezone=Asia/Tokyo");
+    expect(args.args).toContain("--lang=ja-JP");
+    // NOT in context kwargs (would trigger detectable CDP emulation)
+    expect(args.timezoneId).toBeUndefined();
+    expect(args.locale).toBeUndefined();
+  });
+
+  it("forwards proxy string", async () => {
+    const { launchPersistentContext } = await import("../src/playwright.js");
+    await launchPersistentContext({
+      userDataDir: "/tmp/profile",
+      proxy: "http://user:pass@proxy:8080",
+    });
+
+    const args = mockChromium.launchPersistentContext.mock.calls[0][1];
+    expect(args.proxy.server).toBe("http://proxy:8080");
+    expect(args.proxy.username).toBe("user");
+    expect(args.proxy.password).toBe("pass");
+  });
+
+  it("forwards userAgent and colorScheme", async () => {
+    const { launchPersistentContext } = await import("../src/playwright.js");
+    await launchPersistentContext({
+      userDataDir: "/tmp/profile",
+      userAgent: "Custom/1.0",
+      colorScheme: "dark",
+    });
+
+    const args = mockChromium.launchPersistentContext.mock.calls[0][1];
+    expect(args.userAgent).toBe("Custom/1.0");
+    expect(args.colorScheme).toBe("dark");
+  });
+});

js/tests/proxy.test.ts

@@ -0,0 +1,117 @@
+import { describe, it, expect } from "vitest";
+import { parseProxyUrl } from "../src/proxy.js";
+import type { LaunchOptions } from "../src/types.js";
+
+describe("parseProxyUrl", () => {
+  it("passes through URL without credentials", () => {
+    expect(parseProxyUrl("http://proxy:8080")).toEqual({
+      server: "http://proxy:8080",
+    });
+  });
+
+  it("extracts credentials from URL", () => {
+    expect(parseProxyUrl("http://user:pass@proxy:8080")).toEqual({
+      server: "http://proxy:8080",
+      username: "user",
+      password: "pass",
+    });
+  });
+
+  it("decodes URL-encoded special chars", () => {
+    const result = parseProxyUrl("http://user:p%40ss%3Aword@proxy:8080");
+    expect(result.password).toBe("p@ss:word");
+    expect(result.username).toBe("user");
+    expect(result.server).toBe("http://proxy:8080");
+  });
+
+  it("handles socks5 protocol", () => {
+    const result = parseProxyUrl("socks5://user:pass@proxy:1080");
+    expect(result.server).toBe("socks5://proxy:1080");
+    expect(result.username).toBe("user");
+    expect(result.password).toBe("pass");
+  });
+
+  it("handles URL without port", () => {
+    const result = parseProxyUrl("http://user:pass@proxy");
+    expect(result.server).toBe("http://proxy");
+    expect(result.username).toBe("user");
+  });
+
+  it("handles username only (no password)", () => {
+    const result = parseProxyUrl("http://user@proxy:8080");
+    expect(result.server).toBe("http://proxy:8080");
+    expect(result.username).toBe("user");
+    expect(result.password).toBeUndefined();
+  });
+
+  it("passes through unparseable string", () => {
+    expect(parseProxyUrl("not-a-url")).toEqual({ server: "not-a-url" });
+  });
+});
+
+describe("proxy dict type", () => {
+  it("accepts string proxy in LaunchOptions", () => {
+    const opts: LaunchOptions = { proxy: "http://proxy:8080" };
+    expect(typeof opts.proxy).toBe("string");
+  });
+
+  it("accepts dict proxy with bypass in LaunchOptions", () => {
+    const opts: LaunchOptions = {
+      proxy: { server: "http://proxy:8080", bypass: ".google.com,localhost" },
+    };
+    expect(typeof opts.proxy).toBe("object");
+    if (typeof opts.proxy === "object") {
+      expect(opts.proxy.server).toBe("http://proxy:8080");
+      expect(opts.proxy.bypass).toBe(".google.com,localhost");
+    }
+  });
+
+  it("accepts dict proxy with auth and bypass in LaunchOptions", () => {
+    const opts: LaunchOptions = {
+      proxy: {
+        server: "http://proxy:8080",
+        username: "user",
+        password: "pass",
+        bypass: ".example.com",
+      },
+    };
+    if (typeof opts.proxy === "object") {
+      expect(opts.proxy.username).toBe("user");
+      expect(opts.proxy.password).toBe("pass");
+      expect(opts.proxy.bypass).toBe(".example.com");
+    }
+  });
+});
+
+describe("bare proxy format (user:pass@host:port)", () => {
+  it("extracts credentials from bare format", () => {
+    expect(parseProxyUrl("user:pass@proxy:8080")).toEqual({
+      server: "http://proxy:8080",
+      username: "user",
+      password: "pass",
+    });
+  });
+
+  it("credentials not in server", () => {
+    const r = parseProxyUrl("user:pass@proxy1.example.com:5610");
+    expect(r.server).not.toContain("user");
+    expect(r.server).not.toContain("pass");
+  });
+
+  it("bare username only", () => {
+    const r = parseProxyUrl("user@proxy:8080");
+    expect(r.username).toBe("user");
+    expect(r.password).toBeUndefined();
+    expect(r.server).toBe("http://proxy:8080");
+  });
+
+  it("bare no port", () => {
+    const r = parseProxyUrl("user:pass@proxy.example.com");
+    expect(r.username).toBe("user");
+    expect(r.server).toBe("http://proxy.example.com");
+  });
+
+  it("bare no credentials passes through unchanged", () => {
+    expect(parseProxyUrl("proxy:8080")).toEqual({ server: "proxy:8080" });
+  });
+});

js/tests/puppeteer.test.ts

@@ -0,0 +1,114 @@
+import { describe, it, expect, vi, afterEach, beforeEach } from "vitest";
+
+// Mock puppeteer-core and download before importing the module under test
+vi.mock("puppeteer-core", () => ({
+  default: {
+    launch: vi.fn(),
+  },
+}));
+
+vi.mock("../src/download.js", () => ({
+  ensureBinary: vi.fn().mockResolvedValue("/fake/chrome"),
+}));
+
+vi.mock("../src/geoip.js", () => ({
+  resolveProxyGeo: vi.fn().mockResolvedValue({ timezone: null, locale: null }),
+  maybeResolveGeoip: vi.fn().mockResolvedValue({}),
+}));
+
+describe("puppeteer launch", () => {
+  let puppeteerMock: any;
+  let mockBrowser: any;
+
+  beforeEach(async () => {
+    puppeteerMock = await import("puppeteer-core");
+    mockBrowser = {
+      newPage: vi.fn().mockResolvedValue({
+        authenticate: vi.fn(),
+      }),
+      close: vi.fn(),
+    };
+    vi.mocked(puppeteerMock.default.launch).mockResolvedValue(mockBrowser);
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it("calls ensureBinary and launches with binary path", async () => {
+    const { launch } = await import("../src/puppeteer.js");
+    await launch();
+
+    expect(puppeteerMock.default.launch).toHaveBeenCalledWith(
+      expect.objectContaining({
+        executablePath: "/fake/chrome",
+      })
+    );
+  });
+
+  it("includes stealth args by default", async () => {
+    const { launch } = await import("../src/puppeteer.js");
+    await launch();
+
+    const callArgs = vi.mocked(puppeteerMock.default.launch).mock.calls[0][0];
+    expect(callArgs.args.some((a: string) => a.startsWith("--fingerprint="))).toBe(true);
+    expect(callArgs.args).toContain("--no-sandbox");
+  });
+
+  it("excludes stealth args when stealthArgs=false", async () => {
+    const { launch } = await import("../src/puppeteer.js");
+    await launch({ stealthArgs: false });
+
+    const callArgs = vi.mocked(puppeteerMock.default.launch).mock.calls[0][0];
+    expect(callArgs.args.some((a: string) => a.startsWith("--fingerprint="))).toBe(false);
+  });
+
+  it("adds --proxy-server for string proxy", async () => {
+    const { launch } = await import("../src/puppeteer.js");
+    await launch({ proxy: "http://proxy:8080" });
+
+    const callArgs = vi.mocked(puppeteerMock.default.launch).mock.calls[0][0];
+    expect(callArgs.args).toContain("--proxy-server=http://proxy:8080");
+  });
+
+  it("adds --proxy-bypass-list for dict proxy with bypass", async () => {
+    const { launch } = await import("../src/puppeteer.js");
+    await launch({
+      proxy: { server: "http://proxy:8080", bypass: ".google.com,localhost" },
+    });
+
+    const callArgs = vi.mocked(puppeteerMock.default.launch).mock.calls[0][0];
+    expect(callArgs.args).toContain("--proxy-server=http://proxy:8080");
+    expect(callArgs.args).toContain("--proxy-bypass-list=.google.com,localhost");
+  });
+
+  it("monkey-patches newPage for proxy auth", async () => {
+    const { launch } = await import("../src/puppeteer.js");
+    const browser = await launch({ proxy: "http://user:pass@proxy:8080" });
+
+    // newPage should auto-authenticate
+    const page = await browser.newPage();
+    expect(page.authenticate).toHaveBeenCalledWith({
+      username: "user",
+      password: "pass",
+    });
+  });
+
+  it("injects timezone and locale as binary flags", async () => {
+    const { launch } = await import("../src/puppeteer.js");
+    await launch({ timezone: "Asia/Tokyo", locale: "ja-JP" });
+
+    const callArgs = vi.mocked(puppeteerMock.default.launch).mock.calls[0][0];
+    expect(callArgs.args).toContain("--fingerprint-timezone=Asia/Tokyo");
+    expect(callArgs.args).toContain("--lang=ja-JP");
+  });
+
+  it("merges extra args", async () => {
+    const { launch } = await import("../src/puppeteer.js");
+    await launch({ args: ["--disable-gpu", "--no-first-run"] });
+
+    const callArgs = vi.mocked(puppeteerMock.default.launch).mock.calls[0][0];
+    expect(callArgs.args).toContain("--disable-gpu");
+    expect(callArgs.args).toContain("--no-first-run");
+  });
+});

js/tests/update.test.ts

@@ -0,0 +1,376 @@
+import { describe, it, expect, vi, afterEach, beforeEach } from "vitest";
+import {
+  CHROMIUM_VERSION,
+  getChromiumVersion,
+  getDownloadUrl,
+  getEffectiveVersion,
+  getPlatformTag,
+  parseVersion,
+  versionNewer,
+} from "../src/config.js";
+import {
+  binaryInfo,
+  checkForUpdate,
+  checkWrapperUpdate,
+  clearCache,
+  ensureBinary,
+  fetchChecksums,
+  getLatestChromiumVersion,
+  parseChecksums,
+  resetWrapperUpdateChecked,
+} from "../src/download.js";
+
+describe("version comparison", () => {
+  it("parseVersion handles 4-part versions", () => {
+    expect(parseVersion("145.0.7718.0")).toEqual([145, 0, 7718, 0]);
+    expect(parseVersion("142.0.7444.175")).toEqual([142, 0, 7444, 175]);
+  });
+
+  it("detects newer version", () => {
+    expect(versionNewer("145.0.7718.0", "142.0.7444.175")).toBe(true);
+  });
+
+  it("detects older version", () => {
+    expect(versionNewer("142.0.7444.175", "145.0.7718.0")).toBe(false);
+  });
+
+  it("same version is not newer", () => {
+    expect(versionNewer("142.0.7444.175", "142.0.7444.175")).toBe(false);
+  });
+
+  it("patch bump detected", () => {
+    expect(versionNewer("142.0.7444.176", "142.0.7444.175")).toBe(true);
+  });
+
+  it("major bump wins over minor", () => {
+    expect(versionNewer("143.0.0.0", "142.9.9999.999")).toBe(true);
+  });
+
+  it("parseVersion handles 5-part build numbers", () => {
+    expect(parseVersion("145.0.7632.109.2")).toEqual([145, 0, 7632, 109, 2]);
+  });
+
+  it("build bump detected", () => {
+    expect(versionNewer("145.0.7632.109.3", "145.0.7632.109.2")).toBe(true);
+  });
+
+  it("build suffix newer than no suffix", () => {
+    expect(versionNewer("145.0.7632.109.2", "145.0.7632.109")).toBe(true);
+  });
+
+  it("no suffix older than build suffix", () => {
+    expect(versionNewer("145.0.7632.109", "145.0.7632.109.2")).toBe(false);
+  });
+});
+
+describe("download URL", () => {
+  it("uses chromium-v prefix and cloakbrowser repo", () => {
+    const url = getDownloadUrl();
+    expect(url).toContain("cloakbrowser.dev");
+    expect(url).toContain(`chromium-v${getChromiumVersion()}`);
+    expect(url.endsWith(".tar.gz")).toBe(true);
+  });
+
+  it("accepts custom version", () => {
+    const url = getDownloadUrl("145.0.7718.0");
+    expect(url).toContain("chromium-v145.0.7718.0");
+  });
+
+  it("does not reference old repo", () => {
+    const url = getDownloadUrl();
+    expect(url).not.toContain("chromium-stealth-builds");
+  });
+});
+
+describe("latest version (platform-aware)", () => {
+  const platformTarball = `cloakbrowser-${getPlatformTag()}.tar.gz`;
+
+  function makeAssets(platforms: string[]) {
+    return platforms.map((p) => ({ name: `cloakbrowser-${p}.tar.gz` }));
+  }
+
+  function mockFetch(releases: Array<Record<string, unknown>>) {
+    return vi.spyOn(globalThis, "fetch").mockResolvedValue({
+      ok: true,
+      json: async () => releases,
+    } as Response);
+  }
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it("returns version when release has platform asset", async () => {
+    mockFetch([
+      {
+        tag_name: "chromium-v145.0.7718.0",
+        draft: false,
+        assets: makeAssets(["linux-x64", "darwin-arm64", "darwin-x64", "windows-x64"]),
+      },
+    ]);
+    expect(await getLatestChromiumVersion()).toBe("145.0.7718.0");
+  });
+
+  it("skips release without platform asset", async () => {
+    const spy = mockFetch([
+      {
+        tag_name: "chromium-v145.0.7718.0",
+        draft: false,
+        assets: makeAssets(["linux-x64"]), // Linux only
+      },
+      {
+        tag_name: "chromium-v142.0.7444.175",
+        draft: false,
+        assets: makeAssets(["linux-x64", "darwin-arm64", "darwin-x64", "windows-x64"]),
+      },
+    ]);
+    const result = await getLatestChromiumVersion();
+    const tag = getPlatformTag();
+    if (tag === "linux-x64") {
+      expect(result).toBe("145.0.7718.0");
+    } else {
+      expect(result).toBe("142.0.7444.175");
+    }
+  });
+
+  it("returns null when no release has platform asset", async () => {
+    mockFetch([
+      {
+        tag_name: "chromium-v145.0.7718.0",
+        draft: false,
+        assets: [{ name: "cloakbrowser-freebsd-x64.tar.gz" }],
+      },
+    ]);
+    expect(await getLatestChromiumVersion()).toBeNull();
+  });
+
+  it("skips draft releases", async () => {
+    const all = ["linux-x64", "darwin-arm64", "darwin-x64", "windows-x64"];
+    mockFetch([
+      { tag_name: "chromium-v999.0.0.0", draft: true, assets: makeAssets(all) },
+      { tag_name: "chromium-v145.0.7718.0", draft: false, assets: makeAssets(all) },
+    ]);
+    expect(await getLatestChromiumVersion()).toBe("145.0.7718.0");
+  });
+
+  it("returns null on network error", async () => {
+    vi.spyOn(globalThis, "fetch").mockRejectedValue(new Error("timeout"));
+    expect(await getLatestChromiumVersion()).toBeNull();
+  });
+});
+
+describe("wrapper update check", () => {
+  beforeEach(() => {
+    resetWrapperUpdateChecked();
+    delete process.env.CLOAKBROWSER_AUTO_UPDATE;
+    delete process.env.CLOAKBROWSER_DOWNLOAD_URL;
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+    delete process.env.CLOAKBROWSER_AUTO_UPDATE;
+    delete process.env.CLOAKBROWSER_DOWNLOAD_URL;
+  });
+
+  it("warns when newer version available", async () => {
+    const spy = vi.spyOn(globalThis, "fetch").mockResolvedValue({
+      ok: true,
+      json: async () => ({ version: "99.0.0" }),
+    } as Response);
+    const warnSpy = vi.spyOn(console, "warn").mockImplementation(() => {});
+
+    await checkWrapperUpdate();
+
+    expect(spy).toHaveBeenCalledOnce();
+    expect(warnSpy).toHaveBeenCalledWith(expect.stringContaining("Update available"));
+  });
+
+  it("silent when current version", async () => {
+    const { WRAPPER_VERSION } = await import("../src/config.js");
+    vi.spyOn(globalThis, "fetch").mockResolvedValue({
+      ok: true,
+      json: async () => ({ version: WRAPPER_VERSION }),
+    } as Response);
+    const warnSpy = vi.spyOn(console, "warn").mockImplementation(() => {});
+
+    await checkWrapperUpdate();
+
+    expect(warnSpy).not.toHaveBeenCalled();
+  });
+
+  it("disabled by CLOAKBROWSER_AUTO_UPDATE=false", async () => {
+    process.env.CLOAKBROWSER_AUTO_UPDATE = "false";
+    const spy = vi.spyOn(globalThis, "fetch");
+
+    await checkWrapperUpdate();
+
+    expect(spy).not.toHaveBeenCalled();
+  });
+
+  it("disabled by CLOAKBROWSER_DOWNLOAD_URL", async () => {
+    process.env.CLOAKBROWSER_DOWNLOAD_URL = "https://mirror.example.com";
+    const spy = vi.spyOn(globalThis, "fetch");
+
+    await checkWrapperUpdate();
+
+    expect(spy).not.toHaveBeenCalled();
+  });
+
+  it("silent on network error", async () => {
+    vi.spyOn(globalThis, "fetch").mockRejectedValue(new Error("timeout"));
+    const warnSpy = vi.spyOn(console, "warn").mockImplementation(() => {});
+
+    await checkWrapperUpdate();
+
+    expect(warnSpy).not.toHaveBeenCalled();
+  });
+
+  it("runs only once per process", async () => {
+    const spy = vi.spyOn(globalThis, "fetch").mockResolvedValue({
+      ok: true,
+      json: async () => ({ version: "0.0.1" }),
+    } as Response);
+
+    await checkWrapperUpdate();
+    await checkWrapperUpdate();
+
+    expect(spy).toHaveBeenCalledOnce();
+  });
+});
+
+describe("parseChecksums", () => {
+  // Valid 64-char hex strings for testing
+  const HASH_A = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855";
+  const HASH_B = "a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2";
+
+  it("parses standard SHA256SUMS format", () => {
+    const text = [
+      `${HASH_A}  cloakbrowser-linux-x64.tar.gz`,
+      `${HASH_B}  cloakbrowser-darwin-arm64.tar.gz`,
+    ].join("\n");
+    const result = parseChecksums(text);
+    expect(result.get("cloakbrowser-linux-x64.tar.gz")).toBe(HASH_A);
+    expect(result.get("cloakbrowser-darwin-arm64.tar.gz")).toBe(HASH_B);
+  });
+
+  it("handles binary-mode asterisk prefix", () => {
+    const text = `${HASH_A} *cloakbrowser-linux-x64.tar.gz`;
+    const result = parseChecksums(text);
+    expect(result.has("cloakbrowser-linux-x64.tar.gz")).toBe(true);
+  });
+
+  it("skips empty lines", () => {
+    const text = `\n\n${HASH_A}  file.tar.gz\n\n`;
+    expect(parseChecksums(text).size).toBe(1);
+  });
+
+  it("returns empty map for empty input", () => {
+    expect(parseChecksums("").size).toBe(0);
+    expect(parseChecksums("   \n  \n").size).toBe(0);
+  });
+});
+
+describe("download fallback", () => {
+  afterEach(() => {
+    vi.restoreAllMocks();
+    delete process.env.CLOAKBROWSER_DOWNLOAD_URL;
+  });
+
+  it("checksum fetch falls back to GitHub on primary 429", async () => {
+    const HASH =
+      "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855";
+    const checksumText = `${HASH}  cloakbrowser-${getPlatformTag()}.tar.gz`;
+
+    vi.spyOn(globalThis, "fetch").mockImplementation(async (input) => {
+      const url =
+        typeof input === "string"
+          ? input
+          : input instanceof URL
+            ? input.toString()
+            : (input as Request).url;
+      if (url.includes("cloakbrowser.dev")) {
+        return {
+          ok: false,
+          status: 429,
+          statusText: "Too Many Requests",
+        } as Response;
+      }
+      // GitHub fallback
+      return { ok: true, text: async () => checksumText } as Response;
+    });
+
+    const result = await fetchChecksums();
+    expect(result).not.toBeNull();
+    expect(
+      result!.has(`cloakbrowser-${getPlatformTag()}.tar.gz`)
+    ).toBe(true);
+  });
+
+  it("checksum fetch returns null when both sources fail", async () => {
+    vi.spyOn(globalThis, "fetch").mockResolvedValue({
+      ok: false,
+      status: 429,
+      statusText: "Too Many Requests",
+    } as Response);
+
+    const result = await fetchChecksums();
+    expect(result).toBeNull();
+  });
+});
+
+describe("effective version", () => {
+  it("returns platform version when no marker exists", () => {
+    // Default behavior — no marker file in test environment
+    expect(getEffectiveVersion()).toBe(getChromiumVersion());
+  });
+});
+
+describe("ensureBinary", () => {
+  afterEach(() => {
+    delete process.env.CLOAKBROWSER_BINARY_PATH;
+  });
+
+  it("returns local override when set", async () => {
+    // Use this test file as a "binary" that exists
+    process.env.CLOAKBROWSER_BINARY_PATH = __filename;
+    const result = await ensureBinary();
+    expect(result).toBe(__filename);
+  });
+
+  it("throws when local override path missing", async () => {
+    process.env.CLOAKBROWSER_BINARY_PATH = "/nonexistent/chrome";
+    await expect(ensureBinary()).rejects.toThrow("does not exist");
+  });
+});
+
+describe("clearCache", () => {
+  it("does not throw when cache dir missing", () => {
+    const orig = process.env.CLOAKBROWSER_CACHE_DIR;
+    process.env.CLOAKBROWSER_CACHE_DIR = "/tmp/cloakbrowser-test-nonexistent";
+    expect(() => clearCache()).not.toThrow();
+    if (orig) {
+      process.env.CLOAKBROWSER_CACHE_DIR = orig;
+    } else {
+      delete process.env.CLOAKBROWSER_CACHE_DIR;
+    }
+  });
+});
+
+describe("checkForUpdate", () => {
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it("returns null when no newer version", async () => {
+    vi.spyOn(globalThis, "fetch").mockResolvedValue({
+      ok: true,
+      json: async () => [],
+    } as Response);
+    expect(await checkForUpdate()).toBeNull();
+  });
+
+  it("returns null on network error", async () => {
+    vi.spyOn(globalThis, "fetch").mockRejectedValue(new Error("timeout"));
+    expect(await checkForUpdate()).toBeNull();
+  });
+});

js/tsconfig.json

@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "outDir": "dist",
+    "rootDir": "src",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true
+  },
+  "include": ["src"],
+  "exclude": ["dist", "node_modules", "tests", "examples"]
+}

pyproject.toml

@@ -17,15 +17,22 @@ keywords = [
     "browser",
     "chromium",
     "playwright",
+    "puppeteer",
     "scraping",
+    "web-scraping",
     "anti-detect",
+    "antidetect",
+    "undetected",
+    "bot-detection",
+    "fingerprint",
     "recaptcha",
     "cloudflare",
     "turnstile",
-    "bot-detection",
-    "fingerprint",
-    "web-scraping",
+    "datadome",
+    "captcha",
+    "headless",
     "automation",
+    "ai-agent",
 ]
 classifiers = [
     "Development Status :: 4 - Beta",
@@ -46,6 +53,14 @@ dependencies = [
     "httpx>=0.24",
 ]
 
+[project.optional-dependencies]
+geoip = ["geoip2>=4.0"]
+patchright = ["patchright>=1.40"]
+dev = ["pytest>=7.0", "pytest-asyncio>=0.23"]
+
+[project.scripts]
+cloakbrowser = "cloakbrowser.__main__:main"
+
 [project.urls]
 Homepage = "https://github.com/CloakHQ/CloakBrowser"
 Documentation = "https://github.com/CloakHQ/CloakBrowser#readme"

tests/conftest.py

@@ -0,0 +1,11 @@
+"""Shared test fixtures."""
+
+import os
+
+import pytest
+
+
+@pytest.fixture(autouse=True)
+def _clean_backend_env(monkeypatch):
+    """Ensure CLOAKBROWSER_BACKEND doesn't leak into tests from the host environment."""
+    monkeypatch.delenv("CLOAKBROWSER_BACKEND", raising=False)

tests/test_backend.py

@@ -0,0 +1,45 @@
+"""Unit tests for backend resolution (_resolve_backend)."""
+
+import os
+from unittest.mock import patch
+
+import pytest
+
+from cloakbrowser.browser import _resolve_backend
+
+
+def test_resolve_backend_default():
+    """No param, no env var → 'playwright'."""
+    with patch.dict(os.environ, {}, clear=True):
+        assert _resolve_backend(None) == "playwright"
+
+
+def test_resolve_backend_explicit_playwright():
+    assert _resolve_backend("playwright") == "playwright"
+
+
+def test_resolve_backend_explicit_patchright():
+    assert _resolve_backend("patchright") == "patchright"
+
+
+def test_resolve_backend_env_var():
+    """CLOAKBROWSER_BACKEND env var used when no param."""
+    with patch.dict(os.environ, {"CLOAKBROWSER_BACKEND": "patchright"}):
+        assert _resolve_backend(None) == "patchright"
+
+
+def test_resolve_backend_param_beats_env():
+    """Explicit param overrides env var."""
+    with patch.dict(os.environ, {"CLOAKBROWSER_BACKEND": "patchright"}):
+        assert _resolve_backend("playwright") == "playwright"
+
+
+def test_resolve_backend_invalid_raises():
+    with pytest.raises(ValueError, match="Unknown backend 'bogus'"):
+        _resolve_backend("bogus")
+
+
+def test_resolve_backend_invalid_env_raises():
+    with patch.dict(os.environ, {"CLOAKBROWSER_BACKEND": "bogus"}):
+        with pytest.raises(ValueError, match="Unknown backend 'bogus'"):
+            _resolve_backend(None)

tests/test_build_args.py

@@ -0,0 +1,160 @@
+"""Unit tests for _build_args timezone/locale injection and timezone alias."""
+
+from cloakbrowser.browser import _build_args, _resolve_timezone
+
+
+def test_timezone_injected():
+    """--fingerprint-timezone flag should appear when timezone is set."""
+    args = _build_args(stealth_args=True, extra_args=None, timezone="America/New_York")
+    assert "--fingerprint-timezone=America/New_York" in args
+
+
+def test_locale_injected():
+    """--lang and --fingerprint-locale flags should appear when locale is set."""
+    args = _build_args(stealth_args=True, extra_args=None, locale="en-US")
+    assert "--lang=en-US" in args
+    assert "--fingerprint-locale=en-US" in args
+
+
+def test_both_injected():
+    """Both flags should appear when both are set."""
+    args = _build_args(stealth_args=True, extra_args=None, timezone="Europe/Berlin", locale="de-DE")
+    assert "--fingerprint-timezone=Europe/Berlin" in args
+    assert "--lang=de-DE" in args
+    assert "--fingerprint-locale=de-DE" in args
+
+
+def test_timezone_independent_of_stealth_args():
+    """--fingerprint-timezone should be injected even when stealth_args=False."""
+    args = _build_args(stealth_args=False, extra_args=None, timezone="America/New_York", locale="en-US")
+    assert "--fingerprint-timezone=America/New_York" in args
+    assert "--lang=en-US" in args
+    assert "--fingerprint-locale=en-US" in args
+    # No stealth fingerprint args
+    assert not any(a.startswith("--fingerprint=") for a in args)
+
+
+def test_no_flags_when_not_set():
+    """No timezone/lang/fingerprint-locale flags when params are None."""
+    args = _build_args(stealth_args=True, extra_args=None)
+    assert not any(a.startswith("--fingerprint-timezone=") for a in args)
+    assert not any(a.startswith("--lang=") for a in args)
+    assert not any(a.startswith("--fingerprint-locale=") for a in args)
+
+
+def test_extra_args_preserved():
+    """Extra args should still be included alongside timezone/locale."""
+    args = _build_args(stealth_args=True, extra_args=["--disable-gpu"], timezone="Asia/Tokyo", locale="ja-JP")
+    assert "--disable-gpu" in args
+    assert "--fingerprint-timezone=Asia/Tokyo" in args
+    assert "--lang=ja-JP" in args
+    assert "--fingerprint-locale=ja-JP" in args
+
+
+# --- _resolve_timezone alias ---
+
+
+def test_resolve_timezone_id_alias():
+    """timezone_id in kwargs should be promoted to timezone."""
+    kwargs = {"timezone_id": "Europe/Paris"}
+    result = _resolve_timezone(None, kwargs)
+    assert result == "Europe/Paris"
+    assert "timezone_id" not in kwargs
+
+
+def test_resolve_timezone_wins_over_alias():
+    """Explicit timezone takes precedence; timezone_id is still popped."""
+    kwargs = {"timezone_id": "Europe/Paris"}
+    result = _resolve_timezone("UTC", kwargs)
+    assert result == "UTC"
+    assert "timezone_id" not in kwargs
+
+
+def test_resolve_no_alias():
+    """No-op when timezone_id is absent."""
+    kwargs = {"other": "value"}
+    result = _resolve_timezone("UTC", kwargs)
+    assert result == "UTC"
+    assert "other" in kwargs
+
+
+def test_resolve_both_none():
+    """Neither param set — returns None."""
+    kwargs = {}
+    result = _resolve_timezone(None, kwargs)
+    assert result is None
+
+
+# --- Deduplication tests ---
+
+
+def test_user_fingerprint_overrides_default():
+    """User --fingerprint should override the random default seed."""
+    args = _build_args(stealth_args=True, extra_args=["--fingerprint=99887"])
+    fingerprint_args = [a for a in args if a.startswith("--fingerprint=")]
+    assert len(fingerprint_args) == 1
+    assert fingerprint_args[0] == "--fingerprint=99887"
+
+
+def test_user_platform_overrides_default():
+    """User --fingerprint-platform should override the default."""
+    args = _build_args(stealth_args=True, extra_args=["--fingerprint-platform=linux"])
+    platform_args = [a for a in args if a.startswith("--fingerprint-platform=")]
+    assert len(platform_args) == 1
+    assert platform_args[0] == "--fingerprint-platform=linux"
+
+
+def test_timezone_param_overrides_user_arg():
+    """Dedicated timezone param should override user arg."""
+    args = _build_args(
+        stealth_args=True,
+        extra_args=["--fingerprint-timezone=Europe/London"],
+        timezone="America/New_York",
+    )
+    tz_args = [a for a in args if a.startswith("--fingerprint-timezone=")]
+    assert len(tz_args) == 1
+    assert tz_args[0] == "--fingerprint-timezone=America/New_York"
+
+
+def test_locale_param_overrides_user_arg():
+    """Dedicated locale param should override user --lang and --fingerprint-locale args."""
+    args = _build_args(
+        stealth_args=True,
+        extra_args=["--lang=de-DE", "--fingerprint-locale=de-DE"],
+        locale="en-US",
+    )
+    lang_args = [a for a in args if a.startswith("--lang=")]
+    assert len(lang_args) == 1
+    assert lang_args[0] == "--lang=en-US"
+    locale_args = [a for a in args if a.startswith("--fingerprint-locale=")]
+    assert len(locale_args) == 1
+    assert locale_args[0] == "--fingerprint-locale=en-US"
+
+
+def test_no_duplicate_flags():
+    """No flag key should appear more than once in the output."""
+    args = _build_args(
+        stealth_args=True,
+        extra_args=["--fingerprint=99887", "--fingerprint-timezone=UTC", "--lang=fr-FR"],
+        timezone="Europe/Berlin",
+        locale="de-DE",
+    )
+    keys = [a.split("=", 1)[0] for a in args]
+    assert len(keys) == len(set(keys)), f"Duplicate keys found: {keys}"
+
+
+def test_non_value_flags_preserved():
+    """Flags without = should be preserved without dedup issues."""
+    args = _build_args(stealth_args=True, extra_args=["--disable-gpu", "--no-zygote"])
+    assert "--disable-gpu" in args
+    assert "--no-zygote" in args
+    assert "--no-sandbox" in args
+
+
+def test_override_logs_debug(caplog):
+    """Should log debug message when an override happens."""
+    import logging
+
+    with caplog.at_level(logging.DEBUG, logger="cloakbrowser"):
+        _build_args(stealth_args=True, extra_args=["--fingerprint=99887"])
+    assert any("--fingerprint=" in r.message and "99887" in r.message for r in caplog.records)

tests/test_config.py

@@ -0,0 +1,142 @@
+"""Unit tests for config.py — platform detection, paths, stealth args."""
+
+import os
+from unittest.mock import patch
+
+import pytest
+
+from cloakbrowser.config import (
+    get_archive_ext,
+    get_archive_name,
+    get_binary_path,
+    get_cache_dir,
+    get_chromium_version,
+    get_default_stealth_args,
+    get_fallback_download_url,
+    get_platform_tag,
+)
+
+
+# ---------------------------------------------------------------------------
+# Platform-specific binary paths
+# ---------------------------------------------------------------------------
+
+
+class TestGetBinaryPath:
+    def test_linux(self):
+        with patch("cloakbrowser.config.platform.system", return_value="Linux"):
+            path = get_binary_path("145.0.0.0")
+            assert str(path).endswith("chromium-145.0.0.0/chrome")
+
+    def test_darwin(self):
+        with patch("cloakbrowser.config.platform.system", return_value="Darwin"):
+            path = get_binary_path("145.0.0.0")
+            assert str(path).endswith("chromium-145.0.0.0/Chromium.app/Contents/MacOS/Chromium")
+
+    def test_windows(self):
+        with patch("cloakbrowser.config.platform.system", return_value="Windows"):
+            path = get_binary_path("145.0.0.0")
+            assert str(path).endswith("chromium-145.0.0.0/chrome.exe")
+
+
+# ---------------------------------------------------------------------------
+# Archive extension and name
+# ---------------------------------------------------------------------------
+
+
+class TestArchive:
+    def test_ext_windows(self):
+        with patch("cloakbrowser.config.platform.system", return_value="Windows"):
+            assert get_archive_ext() == ".zip"
+
+    def test_ext_unix(self):
+        for system in ("Linux", "Darwin"):
+            with patch("cloakbrowser.config.platform.system", return_value=system):
+                assert get_archive_ext() == ".tar.gz"
+
+    def test_archive_name(self):
+        tag = get_platform_tag()
+        ext = get_archive_ext()
+        assert get_archive_name() == f"cloakbrowser-{tag}{ext}"
+
+    def test_archive_name_custom_tag(self):
+        name = get_archive_name("linux-x64")
+        assert "cloakbrowser-linux-x64" in name
+
+
+# ---------------------------------------------------------------------------
+# Download URLs
+# ---------------------------------------------------------------------------
+
+
+class TestFallbackUrl:
+    def test_github_releases_format(self):
+        url = get_fallback_download_url("145.0.0.0")
+        assert "github.com/CloakHQ/cloakbrowser/releases/download" in url
+        assert "chromium-v145.0.0.0" in url
+
+    def test_default_version(self):
+        url = get_fallback_download_url()
+        version = get_chromium_version()
+        assert f"chromium-v{version}" in url
+
+
+# ---------------------------------------------------------------------------
+# Cache directory
+# ---------------------------------------------------------------------------
+
+
+class TestCacheDir:
+    def test_default_path(self):
+        with patch.dict(os.environ, {}, clear=False):
+            # Remove override if set
+            env = os.environ.copy()
+            env.pop("CLOAKBROWSER_CACHE_DIR", None)
+            with patch.dict(os.environ, env, clear=True):
+                path = get_cache_dir()
+                assert str(path).endswith(".cloakbrowser")
+
+    def test_env_override(self, tmp_path):
+        with patch.dict(os.environ, {"CLOAKBROWSER_CACHE_DIR": str(tmp_path)}):
+            assert get_cache_dir() == tmp_path
+
+
+# ---------------------------------------------------------------------------
+# Platform tag
+# ---------------------------------------------------------------------------
+
+
+class TestPlatformTag:
+    def test_unsupported_raises(self):
+        with patch("cloakbrowser.config.platform.system", return_value="FreeBSD"):
+            with patch("cloakbrowser.config.platform.machine", return_value="x86_64"):
+                with pytest.raises(RuntimeError, match="Unsupported platform"):
+                    get_platform_tag()
+
+
+# ---------------------------------------------------------------------------
+# Stealth args
+# ---------------------------------------------------------------------------
+
+
+class TestStealthArgs:
+    def test_seed_uniqueness(self):
+        """Two calls should produce different fingerprint seeds."""
+        args1 = get_default_stealth_args()
+        args2 = get_default_stealth_args()
+        seed1 = [a for a in args1 if a.startswith("--fingerprint=")][0]
+        seed2 = [a for a in args2 if a.startswith("--fingerprint=")][0]
+        # Seeds are random 10000-99999 — extremely unlikely to collide
+        assert seed1 != seed2
+
+    def test_macos_profile(self):
+        with patch("cloakbrowser.config.platform.system", return_value="Darwin"):
+            args = get_default_stealth_args()
+            assert "--fingerprint-platform=macos" in args
+            assert any("Apple" in a for a in args)
+
+    def test_linux_windows_profile(self):
+        with patch("cloakbrowser.config.platform.system", return_value="Linux"):
+            args = get_default_stealth_args()
+            assert "--fingerprint-platform=windows" in args
+            assert any("NVIDIA" in a for a in args)

tests/test_extract.py

@@ -0,0 +1,192 @@
+"""Unit tests for archive extraction — path traversal protection, flattening, permissions."""
+
+import io
+import os
+import platform
+import stat
+import tarfile
+import zipfile
+
+import pytest
+
+from cloakbrowser.download import (
+    _extract_tar,
+    _extract_zip,
+    _flatten_single_subdir,
+    _is_executable,
+    _make_executable,
+)
+
+
+# ---------------------------------------------------------------------------
+# tar.gz extraction
+# ---------------------------------------------------------------------------
+
+
+def _create_tar_gz(tmp_path, members: dict[str, bytes]) -> "Path":
+    """Create a tar.gz with given {name: content} members."""
+    archive = tmp_path / "test.tar.gz"
+    with tarfile.open(archive, "w:gz") as tar:
+        for name, content in members.items():
+            info = tarfile.TarInfo(name=name)
+            info.size = len(content)
+            tar.addfile(info, io.BytesIO(content))
+    return archive
+
+
+class TestExtractTar:
+    def test_basic(self, tmp_path):
+        archive = _create_tar_gz(tmp_path, {"chrome": b"binary", "lib/libfoo.so": b"lib"})
+        dest = tmp_path / "out"
+        dest.mkdir()
+        _extract_tar(archive, dest)
+        assert (dest / "chrome").read_bytes() == b"binary"
+        assert (dest / "lib" / "libfoo.so").read_bytes() == b"lib"
+
+    def test_path_traversal_blocked(self, tmp_path):
+        archive = tmp_path / "evil.tar.gz"
+        with tarfile.open(archive, "w:gz") as tar:
+            info = tarfile.TarInfo(name="../../../etc/passwd")
+            info.size = 4
+            tar.addfile(info, io.BytesIO(b"evil"))
+
+        dest = tmp_path / "out"
+        dest.mkdir()
+        with pytest.raises(RuntimeError, match="path traversal"):
+            _extract_tar(archive, dest)
+
+    def test_suspicious_symlink_skipped(self, tmp_path):
+        """Symlinks with absolute targets are skipped (logged as warning)."""
+        archive = tmp_path / "symlink.tar.gz"
+        with tarfile.open(archive, "w:gz") as tar:
+            # Normal file
+            info = tarfile.TarInfo(name="chrome")
+            info.size = 6
+            tar.addfile(info, io.BytesIO(b"binary"))
+            # Suspicious symlink
+            sym = tarfile.TarInfo(name="evil_link")
+            sym.type = tarfile.SYMTYPE
+            sym.linkname = "/etc/passwd"
+            tar.addfile(sym)
+
+        dest = tmp_path / "out"
+        dest.mkdir()
+        _extract_tar(archive, dest)
+        # Normal file extracted
+        assert (dest / "chrome").exists()
+        # Suspicious symlink was skipped
+        assert not (dest / "evil_link").exists()
+
+
+# ---------------------------------------------------------------------------
+# zip extraction
+# ---------------------------------------------------------------------------
+
+
+def _create_zip(tmp_path, members: dict[str, bytes]) -> "Path":
+    """Create a zip with given {name: content} members."""
+    archive = tmp_path / "test.zip"
+    with zipfile.ZipFile(archive, "w") as zf:
+        for name, content in members.items():
+            zf.writestr(name, content)
+    return archive
+
+
+class TestExtractZip:
+    def test_basic(self, tmp_path):
+        archive = _create_zip(tmp_path, {"chrome.exe": b"binary", "lib/foo.dll": b"lib"})
+        dest = tmp_path / "out"
+        dest.mkdir()
+        _extract_zip(archive, dest)
+        assert (dest / "chrome.exe").read_bytes() == b"binary"
+        assert (dest / "lib" / "foo.dll").read_bytes() == b"lib"
+
+    def test_path_traversal_blocked(self, tmp_path):
+        archive = tmp_path / "evil.zip"
+        with zipfile.ZipFile(archive, "w") as zf:
+            zf.writestr("../../../etc/passwd", "evil")
+
+        dest = tmp_path / "out"
+        dest.mkdir()
+        with pytest.raises(RuntimeError, match="path traversal"):
+            _extract_zip(archive, dest)
+
+
+# ---------------------------------------------------------------------------
+# Directory flattening
+# ---------------------------------------------------------------------------
+
+
+class TestFlatten:
+    def test_single_subdir_flattened(self, tmp_path):
+        """Single subdir contents moved up."""
+        dest = tmp_path / "out"
+        dest.mkdir()
+        subdir = dest / "fingerprint-chromium-custom-v14"
+        subdir.mkdir()
+        (subdir / "chrome").write_bytes(b"binary")
+        (subdir / "lib").mkdir()
+
+        _flatten_single_subdir(dest)
+
+        assert (dest / "chrome").read_bytes() == b"binary"
+        assert (dest / "lib").is_dir()
+        assert not subdir.exists()
+
+    def test_app_bundle_preserved(self, tmp_path):
+        """.app directory NOT flattened (macOS bundle)."""
+        dest = tmp_path / "out"
+        dest.mkdir()
+        app = dest / "Chromium.app"
+        app.mkdir()
+        (app / "Contents").mkdir()
+        (app / "Contents" / "MacOS").mkdir()
+        (app / "Contents" / "MacOS" / "Chromium").write_bytes(b"binary")
+
+        _flatten_single_subdir(dest)
+
+        # .app bundle kept intact
+        assert app.is_dir()
+        assert (app / "Contents" / "MacOS" / "Chromium").exists()
+
+    def test_noop_multiple_entries(self, tmp_path):
+        """Multiple entries at top level — no flattening."""
+        dest = tmp_path / "out"
+        dest.mkdir()
+        (dest / "chrome").write_bytes(b"binary")
+        (dest / "lib").mkdir()
+
+        _flatten_single_subdir(dest)
+
+        # Nothing moved
+        assert (dest / "chrome").exists()
+        assert (dest / "lib").is_dir()
+
+
+# ---------------------------------------------------------------------------
+# Permissions
+# ---------------------------------------------------------------------------
+
+
+class TestPermissions:
+    @pytest.mark.skipif(platform.system() == "Windows", reason="chmod not applicable on Windows")
+    def test_make_executable(self, tmp_path):
+        binary = tmp_path / "chrome"
+        binary.write_bytes(b"binary")
+        binary.chmod(0o644)
+        assert not _is_executable(binary)
+
+        _make_executable(binary)
+        assert _is_executable(binary)
+
+    def test_is_executable_true(self, tmp_path):
+        binary = tmp_path / "chrome"
+        binary.write_bytes(b"binary")
+        binary.chmod(0o755)
+        assert _is_executable(binary)
+
+    def test_is_executable_false(self, tmp_path):
+        binary = tmp_path / "chrome"
+        binary.write_bytes(b"binary")
+        binary.chmod(0o644)
+        assert not _is_executable(binary)

tests/test_geoip.py

@@ -0,0 +1,159 @@
+"""Unit tests for GeoIP-based timezone/locale detection."""
+
+from unittest.mock import patch
+
+import pytest
+
+from cloakbrowser.browser import _maybe_resolve_geoip
+from cloakbrowser.geoip import (
+    COUNTRY_LOCALE_MAP,
+    _is_private_ip,
+    _resolve_proxy_ip,
+)
+
+
+# ---------------------------------------------------------------------------
+# _resolve_proxy_ip
+# ---------------------------------------------------------------------------
+
+
+def test_resolve_literal_ipv4():
+    assert _resolve_proxy_ip("http://10.50.96.5:8888") == "10.50.96.5"
+
+
+def test_resolve_literal_ipv4_with_auth():
+    assert _resolve_proxy_ip("http://user:pass@10.50.96.5:8888") == "10.50.96.5"
+
+
+def test_resolve_literal_ipv6():
+    ip = _resolve_proxy_ip("http://[::1]:8888")
+    assert ip == "::1"
+
+
+def test_resolve_hostname():
+    """DNS resolution of a known hostname should return an IP."""
+    ip = _resolve_proxy_ip("http://localhost:8888")
+    assert ip is not None
+    assert ip in ("127.0.0.1", "::1")
+
+
+def test_resolve_invalid_url():
+    assert _resolve_proxy_ip("not-a-url") is None
+
+
+def test_resolve_empty():
+    assert _resolve_proxy_ip("") is None
+
+
+# ---------------------------------------------------------------------------
+# COUNTRY_LOCALE_MAP
+# ---------------------------------------------------------------------------
+
+
+def test_locale_map_has_common_countries():
+    for code in ("US", "GB", "DE", "FR", "JP", "BR", "IL", "RU"):
+        assert code in COUNTRY_LOCALE_MAP, f"Missing {code}"
+
+
+def test_locale_map_values_are_bcp47():
+    """All locales should be language-REGION format."""
+    for code, locale in COUNTRY_LOCALE_MAP.items():
+        parts = locale.split("-")
+        assert len(parts) == 2, f"{code}: {locale} not language-REGION"
+        assert parts[0].islower(), f"{code}: language part should be lowercase"
+        assert parts[1].isupper(), f"{code}: region part should be uppercase"
+
+
+# ---------------------------------------------------------------------------
+# resolve_proxy_geo fallbacks
+# ---------------------------------------------------------------------------
+
+
+def test_resolve_geo_raises_when_geoip2_missing():
+    """Should raise ImportError with install instructions when geoip2 not installed."""
+    with patch.dict("sys.modules", {"geoip2": None, "geoip2.database": None}):
+        from importlib import reload
+        import cloakbrowser.geoip as geoip_mod
+        reload(geoip_mod)
+        with pytest.raises(ImportError, match="pip install cloakbrowser"):
+            geoip_mod.resolve_proxy_geo("http://10.50.96.5:8888")
+        # Restore
+        reload(geoip_mod)
+
+
+def test_resolve_geo_returns_none_when_db_missing():
+    """Should return (None, None) when DB file doesn't exist."""
+    mock_geoip2 = type("module", (), {"database": type("db", (), {"Reader": None})})()
+    with patch.dict("sys.modules", {"geoip2": mock_geoip2, "geoip2.database": mock_geoip2.database}):
+        with patch("cloakbrowser.geoip._ensure_geoip_db", return_value=None):
+            with patch("cloakbrowser.geoip._resolve_exit_ip", return_value=None):
+                from cloakbrowser.geoip import resolve_proxy_geo
+                assert resolve_proxy_geo("http://10.50.96.5:8888") == (None, None)
+
+
+# ---------------------------------------------------------------------------
+# _maybe_resolve_geoip (browser.py helper)
+# ---------------------------------------------------------------------------
+
+
+def test_maybe_resolve_skips_when_geoip_false():
+    tz, loc = _maybe_resolve_geoip(False, "http://proxy:8080", None, None)
+    assert tz is None
+    assert loc is None
+
+
+def test_maybe_resolve_skips_when_no_proxy():
+    tz, loc = _maybe_resolve_geoip(True, None, None, None)
+    assert tz is None
+    assert loc is None
+
+
+def test_maybe_resolve_skips_when_both_explicit():
+    """Explicit values should not trigger geoip resolution."""
+    tz, loc = _maybe_resolve_geoip(True, "http://proxy:8080", "Europe/Berlin", "de-DE")
+    assert tz == "Europe/Berlin"
+    assert loc == "de-DE"
+
+
+def test_maybe_resolve_fills_missing_timezone():
+    """When only locale is explicit, geoip should fill timezone."""
+    with patch("cloakbrowser.geoip.resolve_proxy_geo", return_value=("America/New_York", "en-US")):
+        tz, loc = _maybe_resolve_geoip(True, "http://proxy:8080", None, "fr-FR")
+        assert tz == "America/New_York"
+        assert loc == "fr-FR"  # Explicit wins
+
+
+def test_maybe_resolve_fills_missing_locale():
+    """When only timezone is explicit, geoip should fill locale."""
+    with patch("cloakbrowser.geoip.resolve_proxy_geo", return_value=("America/New_York", "en-US")):
+        tz, loc = _maybe_resolve_geoip(True, "http://proxy:8080", "Asia/Tokyo", None)
+        assert tz == "Asia/Tokyo"  # Explicit wins
+        assert loc == "en-US"
+
+
+def test_maybe_resolve_fills_both():
+    """When neither is set, geoip should fill both."""
+    with patch("cloakbrowser.geoip.resolve_proxy_geo", return_value=("Europe/Berlin", "de-DE")):
+        tz, loc = _maybe_resolve_geoip(True, "http://proxy:8080", None, None)
+        assert tz == "Europe/Berlin"
+        assert loc == "de-DE"
+
+
+# ---------------------------------------------------------------------------
+# _is_private_ip
+# ---------------------------------------------------------------------------
+
+
+def test_private_ip_loopback():
+    assert _is_private_ip("127.0.0.1") is True
+
+
+def test_private_ip_rfc1918():
+    assert _is_private_ip("192.168.1.1") is True
+    assert _is_private_ip("10.0.0.1") is True
+    assert _is_private_ip("172.16.0.1") is True
+
+
+def test_private_ip_public():
+    assert _is_private_ip("8.8.8.8") is False
+    assert _is_private_ip("64.176.168.43") is False

tests/test_human_visual.mjs

@@ -0,0 +1,256 @@
+// test_human_visual.mjs
+/**
+ * Visual + functional test for humanize (JS).
+ * Red dot = cursor, yellow = mouse held.
+ * Trail dots show the path taken.
+ */
+import { launch } from '../js/dist/index.js';
+
+const CURSOR_JS = `
+(() => {
+    if (document.getElementById('__hc')) return;
+    const el = document.createElement('div');
+    el.id = '__hc';
+    el.style.cssText = 'width:14px;height:14px;background:red;border:2px solid darkred;border-radius:50%;position:fixed;z-index:2147483647;pointer-events:none;display:none;transition:background 0.05s;';
+    document.body.appendChild(el);
+
+    const trail = document.createElement('div');
+    trail.id = '__hcTrail';
+    trail.style.cssText = 'position:fixed;top:0;left:0;width:100%;height:100%;z-index:2147483646;pointer-events:none;overflow:hidden;';
+    document.body.appendChild(trail);
+
+    let dotCount = 0;
+    const maxDots = 500;
+
+    function updatePos(x, y) {
+        el.style.display = 'block';
+        el.style.left = (x - 9) + 'px';
+        el.style.top = (y - 9) + 'px';
+        if (dotCount < maxDots) {
+            const dot = document.createElement('div');
+            dot.style.cssText = 'width:3px;height:3px;background:rgba(255,0,0,0.3);border-radius:50%;position:fixed;pointer-events:none;left:'+(x-1)+'px;top:'+(y-1)+'px;';
+            trail.appendChild(dot);
+            dotCount++;
+        }
+    }
+
+    document.addEventListener('mousemove', e => updatePos(e.clientX, e.clientY));
+    document.addEventListener('drag', e => { if (e.clientX > 0) updatePos(e.clientX, e.clientY); });
+    document.addEventListener('dragover', e => { if (e.clientX > 0) updatePos(e.clientX, e.clientY); });
+    document.addEventListener('mousedown', () => { el.style.background = 'yellow'; });
+    document.addEventListener('mouseup', () => { el.style.background = 'red'; });
+    document.addEventListener('dragend', () => { el.style.background = 'red'; });
+})();
+`;
+
+const results = [];
+const delay = ms => new Promise(r => setTimeout(r, ms));
+
+async function inject(page) {
+  try { await page.evaluate(CURSOR_JS); } catch {}
+  await delay(300);
+}
+
+function step(name) {
+  console.log(`\n${'='.repeat(60)}`);
+  console.log(`  STEP: ${name}`);
+  console.log('='.repeat(60));
+}
+
+function check(name, passed, detail = '') {
+  const status = passed ? 'PASS' : 'FAIL';
+  let msg = `  [${status}] ${name}`;
+  if (detail) msg += ` — ${detail}`;
+  console.log(msg);
+  results.push({ name, status });
+}
+
+async function main() {
+  console.log('='.repeat(70));
+  console.log('  HUMAN-LIKE BEHAVIOR VISUAL TEST (JS)');
+  console.log('  Watch the red dot — it should move smoothly like a real cursor');
+  console.log('='.repeat(70));
+
+  const browser = await launch({
+    headless: false,
+    humanize: true,
+  });
+  const page = await browser.newPage();
+
+  // ============================================================
+  // SCENARIO 1: Wikipedia search
+  // ============================================================
+  step('Wikipedia — navigate and search');
+  await page.goto('https://www.wikipedia.org', { waitUntil: 'domcontentloaded' });
+  await delay(2000);
+  await inject(page);
+  await delay(1000);
+
+  console.log('  Watch: cursor moves to search box (Bezier curve)');
+  let t0 = Date.now();
+  await page.locator('#searchInput').click();
+  let ms = Date.now() - t0;
+  check('click on search input', ms > 200, `${ms} ms`);
+  await delay(500);
+
+  console.log('  Watch: characters appear one by one');
+  t0 = Date.now();
+  await page.locator('#searchInput').fill('Python programming language');
+  ms = Date.now() - t0;
+  let val = await page.locator('#searchInput').inputValue();
+  check('fill search box', val === 'Python programming language' && ms > 2000, `${ms} ms, value='${val}'`);
+  await delay(500);
+
+  console.log('  Watch: double click selects word');
+  t0 = Date.now();
+  await page.locator('#searchInput').dblclick();
+  ms = Date.now() - t0;
+  let sel = await page.evaluate(() => window.getSelection().toString().trim());
+  check('dblclick selects word', sel.length > 0 && ms > 200, `${ms} ms, selected='${sel}'`);
+  await delay(500);
+
+  console.log('  Watch: old text replaced');
+  t0 = Date.now();
+  await page.locator('#searchInput').fill('Artificial intelligence');
+  ms = Date.now() - t0;
+  val = await page.locator('#searchInput').inputValue();
+  check('fill replaces text', val === 'Artificial intelligence' && ms > 1500, `${ms} ms, value='${val}'`);
+  await delay(500);
+
+  console.log('  Watch: cursor hovers button without clicking');
+  t0 = Date.now();
+  await page.locator('button[type="submit"]').hover();
+  ms = Date.now() - t0;
+  check('hover search button', ms > 100, `${ms} ms`);
+  await delay(1000);
+
+  // ============================================================
+  // SCENARIO 2: Checkboxes
+  // ============================================================
+  step('Checkboxes — check and uncheck');
+  await page.goto('https://the-internet.herokuapp.com/checkboxes', { waitUntil: 'domcontentloaded' });
+  await delay(2000);
+  await inject(page);
+  await delay(1000);
+
+  const cb1 = page.locator('input[type="checkbox"]').nth(0);
+  const cb2 = page.locator('input[type="checkbox"]').nth(1);
+
+  if (await cb1.isChecked()) { await cb1.uncheck(); await delay(500); }
+
+  console.log('  Watch: cursor moves to checkbox, clicks');
+  t0 = Date.now();
+  await cb1.check();
+  ms = Date.now() - t0;
+  check('check checkbox 1', await cb1.isChecked() && ms > 200, `${ms} ms`);
+  await delay(500);
+
+  if (!(await cb2.isChecked())) { await cb2.check(); await delay(500); }
+
+  t0 = Date.now();
+  await cb2.uncheck();
+  ms = Date.now() - t0;
+  check('uncheck checkbox 2', !(await cb2.isChecked()) && ms > 200, `${ms} ms`);
+  await delay(1000);
+
+  // ============================================================
+  // SCENARIO 3: Dropdown
+  // ============================================================
+  step('Dropdown — select option');
+  await page.goto('https://the-internet.herokuapp.com/dropdown', { waitUntil: 'domcontentloaded' });
+  await delay(2000);
+  await inject(page);
+  await delay(1000);
+
+  console.log('  Watch: cursor hovers dropdown, option selected');
+  t0 = Date.now();
+  await page.locator('#dropdown').selectOption('2');
+  ms = Date.now() - t0;
+  val = await page.locator('#dropdown').inputValue();
+  check('select option', val === '2' && ms > 100, `${ms} ms, value='${val}'`);
+  await delay(1000);
+
+  // ============================================================
+  // SCENARIO 4: Drag and Drop
+  // ============================================================
+  step('Drag and Drop');
+  await page.goto('https://the-internet.herokuapp.com/drag_and_drop', { waitUntil: 'domcontentloaded' });
+  await delay(2000);
+  await inject(page);
+  await delay(1000);
+
+  const beforeA = (await page.locator('#column-a header').textContent()).trim();
+  console.log(`  Before: A='${beforeA}'`);
+  console.log('  Watch: cursor to A, yellow (held), moves to B, releases');
+
+  t0 = Date.now();
+  await page.locator('#column-a').dragTo(page.locator('#column-b'));
+  ms = Date.now() - t0;
+  await delay(1000);
+
+  const afterA = (await page.locator('#column-a header').textContent()).trim();
+  const swapped = beforeA !== afterA;
+  check('drag A to B', swapped && ms > 300, `${ms} ms, swapped=${swapped}`);
+  await delay(1000);
+
+  // ============================================================
+  // SCENARIO 5: Text editing
+  // ============================================================
+  step('Text editing — type, press, clear');
+  await page.goto('https://www.wikipedia.org', { waitUntil: 'domcontentloaded' });
+  await delay(2000);
+  await inject(page);
+  await delay(1000);
+
+  console.log('  Watch: types character by character');
+  t0 = Date.now();
+  await page.locator('#searchInput').type('Hello World');
+  ms = Date.now() - t0;
+  val = await page.locator('#searchInput').inputValue();
+  check("type 'Hello World'", val === 'Hello World' && ms > 1000, `${ms} ms`);
+  await delay(500);
+
+  console.log('  Watch: field cleared');
+  t0 = Date.now();
+  await page.locator('#searchInput').clear();
+  ms = Date.now() - t0;
+  val = await page.locator('#searchInput').inputValue();
+  check('clear field', val === '' && ms > 100, `${ms} ms`);
+  await delay(500);
+
+  console.log('  Watch: mouse moves in Bezier curve');
+  t0 = Date.now();
+  await page.mouse.move(600, 400);
+  ms = Date.now() - t0;
+  check('mouse.move', ms > 100, `${ms} ms`);
+  await delay(500);
+
+  t0 = Date.now();
+  await page.mouse.click(300, 300);
+  ms = Date.now() - t0;
+  check('mouse.click', ms > 100, `${ms} ms`);
+  await delay(1000);
+
+  // ============================================================
+  // SUMMARY
+  // ============================================================
+  console.log('\n' + '='.repeat(70));
+  console.log('  SUMMARY');
+  console.log('='.repeat(70));
+
+  const passed = results.filter(r => r.status === 'PASS').length;
+  const failed = results.filter(r => r.status === 'FAIL').length;
+
+  for (const r of results) {
+    const icon = r.status === 'PASS' ? 'OK' : 'XX';
+    console.log(`  [${icon}] ${r.name}`);
+  }
+
+  console.log(`\n  ${passed}/${results.length} passed, ${failed} failed`);
+  if (failed === 0) console.log('  *** ALL TESTS PASSED ***');
+  console.log('='.repeat(70));
+
+  await browser.close();
+}
+
+main().catch(console.error);

tests/test_human_visual.py

@@ -0,0 +1,302 @@
+"""
+Visual + functional test for humanize.
+Red dot = cursor, yellow = mouse held.
+"""
+import pytest
+pytestmark = pytest.mark.slow
+
+if __name__ == "__main__":
+    from cloakbrowser import launch
+    import time
+
+    CURSOR_JS = """
+    () => {
+        if (document.getElementById('__hc')) return;
+        const el = document.createElement('div');
+        el.id = '__hc';
+        el.style.cssText = 'width:14px;height:14px;background:red;border:2px solid darkred;border-radius:50%;position:fixed;z-index:2147483647;pointer-events:none;display:none;transition:background 0.05s;';
+        document.body.appendChild(el);
+
+        const trail = document.createElement('div');
+        trail.id = '__hcTrail';
+        trail.style.cssText = 'position:fixed;top:0;left:0;width:100%;height:100%;z-index:2147483646;pointer-events:none;overflow:hidden;';
+        document.body.appendChild(trail);
+
+        let dotCount = 0;
+        const maxDots = 500;
+
+        function updatePos(x, y) {
+            el.style.display = 'block';
+            el.style.left = (x - 9) + 'px';
+            el.style.top = (y - 9) + 'px';
+
+            if (dotCount < maxDots) {
+                const dot = document.createElement('div');
+                dot.style.cssText = 'width:3px;height:3px;background:rgba(255,0,0,0.3);border-radius:50%;position:fixed;pointer-events:none;left:'+(x-1)+'px;top:'+(y-1)+'px;';
+                trail.appendChild(dot);
+                dotCount++;
+            }
+        }
+
+        document.addEventListener('mousemove', e => updatePos(e.clientX, e.clientY));
+        document.addEventListener('drag', e => { if (e.clientX > 0) updatePos(e.clientX, e.clientY); });
+        document.addEventListener('dragover', e => { if (e.clientX > 0) updatePos(e.clientX, e.clientY); });
+        document.addEventListener('mousedown', () => { el.style.background = 'yellow'; });
+        document.addEventListener('mouseup', () => { el.style.background = 'red'; });
+        document.addEventListener('dragend', () => { el.style.background = 'red'; });
+    }
+    """
+
+    def inject(page):
+        try:
+            page.evaluate(CURSOR_JS)
+        except:
+            pass
+        time.sleep(0.3)
+
+    results = []
+
+    def step(name):
+        print(f"\n{'='*60}")
+        print(f"  STEP: {name}")
+        print(f"{'='*60}")
+
+    def check(name, passed, detail=""):
+        status = "PASS" if passed else "FAIL"
+        msg = f"  [{status}] {name}"
+        if detail:
+            msg += f" — {detail}"
+        print(msg)
+        results.append((name, status))
+
+    print("=" * 70)
+    print("  HUMAN-LIKE BEHAVIOR VISUAL TEST")
+    print("  Watch the red dot — it should move smoothly like a real cursor")
+    print("  Yellow = mouse button held")
+    print("  Red trail dots = path taken")
+    print("=" * 70)
+
+    browser = launch(headless=False, humanize=True)
+    page = browser.new_page()
+
+    # ============================================================
+    # SCENARIO 1: Wikipedia search
+    # ============================================================
+    step("Wikipedia — navigate and search")
+    page.goto('https://www.wikipedia.org', wait_until='domcontentloaded')
+    time.sleep(2)
+    inject(page)
+    time.sleep(1)
+
+    print("  Watch: cursor moves to search box (Bezier curve)")
+    t0 = time.time()
+    page.locator('#searchInput').click()
+    click_ms = int((time.time() - t0) * 1000)
+    check("click on search input", click_ms > 200, f"{click_ms} ms")
+    time.sleep(0.5)
+
+    print("  Watch: characters appear one by one with varying speed")
+    t0 = time.time()
+    page.locator('#searchInput').fill('Python programming language')
+    fill_ms = int((time.time() - t0) * 1000)
+    val = page.locator('#searchInput').input_value()
+    check("fill search box", val == 'Python programming language' and fill_ms > 2000, f"{fill_ms} ms, value='{val}'")
+    time.sleep(0.5)
+
+    print("  Watch: cursor moves to search box, double yellow flash, word selected")
+    t0 = time.time()
+    page.locator('#searchInput').dblclick()
+    dbl_ms = int((time.time() - t0) * 1000)
+    sel = page.evaluate('() => window.getSelection().toString().trim()')
+    check("dblclick selects word", len(sel) > 0 and dbl_ms > 200, f"{dbl_ms} ms, selected='{sel}'")
+    time.sleep(0.5)
+
+    print("  Watch: old text cleared, new text typed")
+    t0 = time.time()
+    page.locator('#searchInput').fill('Artificial intelligence')
+    fill2_ms = int((time.time() - t0) * 1000)
+    val2 = page.locator('#searchInput').input_value()
+    check("fill replaces text", val2 == 'Artificial intelligence' and fill2_ms > 1500, f"{fill2_ms} ms, value='{val2}'")
+    time.sleep(0.5)
+
+    print("  Watch: cursor moves to button without clicking")
+    t0 = time.time()
+    page.locator('button[type="submit"]').hover()
+    hover_ms = int((time.time() - t0) * 1000)
+    check("hover search button", hover_ms > 100, f"{hover_ms} ms")
+    time.sleep(1)
+
+    # ============================================================
+    # SCENARIO 2: Form interaction — checkboxes
+    # ============================================================
+    step("Checkboxes — check and uncheck")
+    page.goto('https://the-internet.herokuapp.com/checkboxes', wait_until='domcontentloaded')
+    time.sleep(2)
+    inject(page)
+    time.sleep(1)
+
+    cb1 = page.locator('input[type="checkbox"]').nth(0)
+    cb2 = page.locator('input[type="checkbox"]').nth(1)
+
+    print("  Watch: cursor moves to first checkbox, clicks")
+    if cb1.is_checked():
+        cb1.uncheck()
+        time.sleep(0.5)
+
+    t0 = time.time()
+    cb1.check()
+    check_ms = int((time.time() - t0) * 1000)
+    check("check checkbox 1", cb1.is_checked() and check_ms > 200, f"{check_ms} ms, checked={cb1.is_checked()}")
+    time.sleep(0.5)
+
+    print("  Watch: cursor moves to second checkbox, clicks to uncheck")
+    if not cb2.is_checked():
+        cb2.check()
+        time.sleep(0.5)
+
+    t0 = time.time()
+    cb2.uncheck()
+    uncheck_ms = int((time.time() - t0) * 1000)
+    check("uncheck checkbox 2", not cb2.is_checked() and uncheck_ms > 200, f"{uncheck_ms} ms, checked={cb2.is_checked()}")
+    time.sleep(1)
+
+    # ============================================================
+    # SCENARIO 3: Dropdown
+    # ============================================================
+    step("Dropdown — select option")
+    page.goto('https://the-internet.herokuapp.com/dropdown', wait_until='domcontentloaded')
+    time.sleep(2)
+    inject(page)
+    time.sleep(1)
+
+    print("  Watch: cursor moves to dropdown, hovers, option selected")
+    t0 = time.time()
+    page.locator('#dropdown').select_option('1')
+    sel_ms = int((time.time() - t0) * 1000)
+    val = page.locator('#dropdown').input_value()
+    check("select option 1", val == '1' and sel_ms > 100, f"{sel_ms} ms, value='{val}'")
+    time.sleep(0.5)
+
+    t0 = time.time()
+    page.locator('#dropdown').select_option('2')
+    sel2_ms = int((time.time() - t0) * 1000)
+    val2 = page.locator('#dropdown').input_value()
+    check("select option 2", val2 == '2' and sel2_ms > 100, f"{sel2_ms} ms, value='{val2}'")
+    time.sleep(1)
+
+    # ============================================================
+    # SCENARIO 4: Drag and drop
+    # ============================================================
+    step("Drag and Drop — move column A to B")
+    page.goto('https://the-internet.herokuapp.com/drag_and_drop', wait_until='domcontentloaded')
+    time.sleep(2)
+    inject(page)
+    time.sleep(1)
+
+    before_a = page.locator('#column-a header').text_content().strip()
+    before_b = page.locator('#column-b header').text_content().strip()
+    print(f"  Before: A='{before_a}', B='{before_b}'")
+
+    print("  Watch: cursor moves to A, turns yellow (held), moves to B, releases")
+    t0 = time.time()
+    page.locator('#column-a').drag_to(page.locator('#column-b'))
+    drag_ms = int((time.time() - t0) * 1000)
+    time.sleep(1)
+
+    after_a = page.locator('#column-a header').text_content().strip()
+    after_b = page.locator('#column-b header').text_content().strip()
+    swapped = before_a != after_a
+    print(f"  After:  A='{after_a}', B='{after_b}'")
+    check("drag A to B", swapped and drag_ms > 300, f"{drag_ms} ms, swapped={swapped}")
+    time.sleep(1)
+
+    # ============================================================
+    # SCENARIO 5: Text editing
+    # ============================================================
+    step("Text editing — type, press keys, clear")
+    page.goto('https://www.wikipedia.org', wait_until='domcontentloaded')
+    time.sleep(2)
+    inject(page)
+    time.sleep(1)
+
+    print("  Watch: cursor clicks input, types character by character")
+    t0 = time.time()
+    page.locator('#searchInput').type('Hello World')
+    type_ms = int((time.time() - t0) * 1000)
+    val = page.locator('#searchInput').input_value()
+    check("type 'Hello World'", val == 'Hello World' and type_ms > 1000, f"{type_ms} ms, value='{val}'")
+    time.sleep(0.5)
+
+    print("  Watch: cursor clicks, presses single key")
+    t0 = time.time()
+    page.locator('#searchInput').press('End')
+    page.locator('#searchInput').press('!')
+    press_ms = int((time.time() - t0) * 1000)
+    val = page.locator('#searchInput').input_value()
+    check("press '!' at end", '!' in val and press_ms > 100, f"{press_ms} ms, value='{val}'")
+    time.sleep(0.5)
+
+    print("  Watch: field gets cleared (Ctrl+A, Backspace)")
+    t0 = time.time()
+    page.locator('#searchInput').clear()
+    clear_ms = int((time.time() - t0) * 1000)
+    val = page.locator('#searchInput').input_value()
+    check("clear field", val == '' and clear_ms > 100, f"{clear_ms} ms, value='{repr(val)}'")
+    time.sleep(0.5)
+
+    print("  Watch: press_sequentially types each key individually")
+    t0 = time.time()
+    page.locator('#searchInput').press_sequentially('Sequential')
+    pseq_ms = int((time.time() - t0) * 1000)
+    val = page.locator('#searchInput').input_value()
+    check("press_sequentially", val == 'Sequential' and pseq_ms > 500, f"{pseq_ms} ms, value='{val}'")
+    time.sleep(1)
+
+    # ============================================================
+    # SCENARIO 6: Mouse precision
+    # ============================================================
+    step("Mouse precision — move to coordinates")
+    print("  Watch: cursor moves in a Bezier curve to (600, 400)")
+    t0 = time.time()
+    page.mouse.move(600, 400)
+    move_ms = int((time.time() - t0) * 1000)
+    check("mouse.move to (600,400)", move_ms > 100, f"{move_ms} ms")
+    time.sleep(0.5)
+
+    print("  Watch: cursor moves to (200, 200), clicks")
+    t0 = time.time()
+    page.mouse.click(200, 200)
+    mclick_ms = int((time.time() - t0) * 1000)
+    check("mouse.click at (200,200)", mclick_ms > 100, f"{mclick_ms} ms")
+    time.sleep(0.5)
+
+    print("  Watch: keyboard types directly (no click needed)")
+    page.locator('#searchInput').click()
+    time.sleep(0.3)
+    t0 = time.time()
+    page.keyboard.type('Direct keyboard')
+    kb_ms = int((time.time() - t0) * 1000)
+    check("keyboard.type", kb_ms > 500, f"{kb_ms} ms")
+    time.sleep(1)
+
+    # ============================================================
+    # SUMMARY
+    # ============================================================
+    print("\n" + "=" * 70)
+    print("  SUMMARY")
+    print("=" * 70)
+    passed = sum(1 for _, s in results if s == "PASS")
+    failed = sum(1 for _, s in results if s == "FAIL")
+    total = len(results)
+
+    for name, status in results:
+        icon = "OK" if status == "PASS" else "XX"
+        print(f"  [{icon}] {name}")
+
+    print(f"\n  {passed}/{total} passed, {failed} failed")
+    if failed == 0:
+        print("  *** ALL TESTS PASSED ***")
+    print("=" * 70)
+
+    input("\nPress Enter to close browser...")
+    browser.close()

tests/test_humanize_unit.mjs

@@ -0,0 +1,470 @@
+/**
+ * Unit + integration tests for the humanize layer (JS).
+ * Covers: config resolution, Bézier math, fill clearing,
+ * bot-detection form, and patching integrity.
+ *
+ * Run: node tests/test_humanize_unit.mjs
+ */
+import { launch } from '../js/dist/index.js';
+import { resolveConfig, rand, randRange, sleep } from '../js/dist/human/config.js';
+import { humanMove, clickTarget } from '../js/dist/human/mouse.js';
+
+const PROXY = {
+
+};
+const delay = ms => new Promise(r => setTimeout(r, ms));
+const results = [];
+
+async function test(name, fn) {
+  try {
+    await fn();
+    console.log(`  [PASS] ${name}`);
+    results.push({ name, status: 'PASS' });
+  } catch (e) {
+    console.log(`  [FAIL] ${name} — ${e.message || e}`);
+    results.push({ name, status: 'FAIL' });
+  }
+}
+
+// =========================================================================
+// 1. Config resolution
+// =========================================================================
+console.log('\n' + '='.repeat(60));
+console.log('  CONFIG RESOLUTION');
+console.log('='.repeat(60));
+
+await test('default config resolves', async () => {
+  const cfg = resolveConfig('default');
+  if (!cfg) throw new Error('resolveConfig returned null');
+  if (cfg.mouse_min_steps <= 0) throw new Error('mouse_min_steps should be > 0');
+  if (cfg.mouse_max_steps <= cfg.mouse_min_steps) throw new Error('mouse_max_steps should be > min');
+  if (cfg.typing_delay <= 0) throw new Error('typing_delay should be > 0');
+  if (!Array.isArray(cfg.initial_cursor_x) || cfg.initial_cursor_x.length !== 2) throw new Error('initial_cursor_x invalid');
+  if (!Array.isArray(cfg.initial_cursor_y) || cfg.initial_cursor_y.length !== 2) throw new Error('initial_cursor_y invalid');
+});
+
+await test('careful config resolves', async () => {
+  const cfg = resolveConfig('careful');
+  const def = resolveConfig('default');
+  if (!cfg) throw new Error('resolveConfig returned null');
+  if (cfg.typing_delay < def.typing_delay) throw new Error('careful should have >= typing_delay');
+});
+
+await test('custom config override', async () => {
+  const cfg = resolveConfig('default', { mouse_min_steps: 100, mouse_max_steps: 200 });
+  if (cfg.mouse_min_steps !== 100) throw new Error(`Override failed: ${cfg.mouse_min_steps}`);
+  if (cfg.mouse_max_steps !== 200) throw new Error(`Override failed: ${cfg.mouse_max_steps}`);
+});
+
+await test('rand within bounds', async () => {
+  for (let i = 0; i < 100; i++) {
+    const v = rand(10, 20);
+    if (v < 10 || v > 20) throw new Error(`rand out of range: ${v}`);
+  }
+});
+
+await test('randRange within bounds', async () => {
+  for (let i = 0; i < 100; i++) {
+    const v = randRange([5, 15]);
+    if (v < 5 || v > 15) throw new Error(`randRange out of range: ${v}`);
+  }
+});
+
+await test('sleep timing', async () => {
+  const t0 = Date.now();
+  await sleep(50);
+  const elapsed = Date.now() - t0;
+  if (elapsed < 40) throw new Error(`sleep too short: ${elapsed} ms`);
+  if (elapsed > 200) throw new Error(`sleep too long: ${elapsed} ms`);
+});
+
+// =========================================================================
+// 2. Bézier math (via humanMove recording)
+// =========================================================================
+console.log('\n' + '='.repeat(60));
+console.log('  BÉZIER MATH (via mouse movement recording)');
+console.log('='.repeat(60));
+
+await test('humanMove generates multiple points', async () => {
+  const cfg = resolveConfig('default');
+  const moves = [];
+  const fakeRaw = {
+    move: async (x, y) => moves.push({ x, y }),
+    down: async () => {},
+    up: async () => {},
+    wheel: async () => {},
+  };
+  await humanMove(fakeRaw, 0, 0, 500, 300, cfg);
+  if (moves.length < 10) throw new Error(`Expected >= 10 moves, got ${moves.length}`);
+  const last = moves[moves.length - 1];
+  if (Math.abs(last.x - 500) > 10) throw new Error(`Last x too far: ${last.x}`);
+  if (Math.abs(last.y - 300) > 10) throw new Error(`Last y too far: ${last.y}`);
+});
+
+await test('humanMove smoothness (no large jumps)', async () => {
+  const cfg = resolveConfig('default');
+  const moves = [];
+  const fakeRaw = {
+    move: async (x, y) => moves.push({ x, y }),
+    down: async () => {},
+    up: async () => {},
+    wheel: async () => {},
+  };
+  await humanMove(fakeRaw, 0, 0, 400, 400, cfg);
+  const totalDist = Math.sqrt(400 * 400 + 400 * 400);
+  const maxJump = totalDist * 0.5;
+  for (let i = 1; i < moves.length; i++) {
+    const dx = moves[i].x - moves[i - 1].x;
+    const dy = moves[i].y - moves[i - 1].y;
+    const jump = Math.sqrt(dx * dx + dy * dy);
+    if (jump > maxJump) throw new Error(`Jump too large at step ${i}: ${jump.toFixed(1)}`);
+  }
+});
+
+await test('humanMove not a straight line', async () => {
+  const cfg = resolveConfig('default');
+  let maxDev = 0;
+  for (let trial = 0; trial < 5; trial++) {
+    const moves = [];
+    const fakeRaw = {
+      move: async (x, y) => moves.push({ x, y }),
+      down: async () => {},
+      up: async () => {},
+      wheel: async () => {},
+    };
+    await humanMove(fakeRaw, 0, 0, 500, 0, cfg);
+    const dev = Math.max(...moves.map(m => Math.abs(m.y)));
+    if (dev > maxDev) maxDev = dev;
+  }
+  if (maxDev < 0.5) throw new Error(`Curve too straight, max y deviation: ${maxDev.toFixed(2)}`);
+});
+
+await test('clickTarget within bounding box', async () => {
+  const cfg = resolveConfig('default');
+  const box = { x: 100, y: 200, width: 150, height: 40 };
+  for (let i = 0; i < 50; i++) {
+    const t = clickTarget(box, false, cfg);
+    if (t.x < 100 || t.x > 250) throw new Error(`x out of box: ${t.x}`);
+    if (t.y < 200 || t.y > 240) throw new Error(`y out of box: ${t.y}`);
+  }
+});
+
+// =========================================================================
+// 3. Fill clearing (with real browser)
+// =========================================================================
+console.log('\n' + '='.repeat(60));
+console.log('  FILL CLEARING (browser)');
+console.log('='.repeat(60));
+
+await test('fill() clears existing text', async () => {
+  const browser = await launch({ headless: true, humanize: true });
+  const page = await browser.newPage();
+  await page.goto('https://www.wikipedia.org', { waitUntil: 'domcontentloaded' });
+  await delay(1000);
+
+  await page.locator('#searchInput').type('initial text');
+  await delay(500);
+  const before = await page.locator('#searchInput').inputValue();
+  if (before !== 'initial text') throw new Error(`Initial type failed: '${before}'`);
+
+  await page.locator('#searchInput').fill('replaced text');
+  await delay(500);
+  const after = await page.locator('#searchInput').inputValue();
+  if (after !== 'replaced text') throw new Error(`Fill did not replace: '${after}'`);
+  if (after.includes('initial')) throw new Error('Old text still present');
+
+  await browser.close();
+});
+
+await test('fill() timing is humanized (>1s)', async () => {
+  const browser = await launch({ headless: true, humanize: true });
+  const page = await browser.newPage();
+  await page.goto('https://www.wikipedia.org', { waitUntil: 'domcontentloaded' });
+  await delay(1000);
+
+  const t0 = Date.now();
+  await page.locator('#searchInput').fill('Human speed test');
+  const elapsed = Date.now() - t0;
+  if (elapsed < 1000) throw new Error(`fill() too fast: ${elapsed} ms`);
+
+  await browser.close();
+});
+
+await test('clear() empties field', async () => {
+  const browser = await launch({ headless: true, humanize: true });
+  const page = await browser.newPage();
+  await page.goto('https://www.wikipedia.org', { waitUntil: 'domcontentloaded' });
+  await delay(1000);
+
+  await page.locator('#searchInput').fill('some text');
+  await delay(500);
+  await page.locator('#searchInput').clear();
+  await delay(500);
+  const val = await page.locator('#searchInput').inputValue();
+  if (val !== '') throw new Error(`clear() did not empty: '${val}'`);
+
+  await browser.close();
+});
+
+// =========================================================================
+// 4. Bot detection form — deviceandbrowserinfo.com
+// =========================================================================
+console.log('\n' + '='.repeat(60));
+console.log('  BOT DETECTION FORM (deviceandbrowserinfo.com)');
+console.log('='.repeat(60));
+
+await test('bot detection form — behavioral checks pass', async () => {
+  const browser = await launch({ headless: false, humanize: true, proxy: PROXY });
+  const page = await browser.newPage();
+  await page.goto('https://deviceandbrowserinfo.com/are_you_a_bot_interactions', { waitUntil: 'domcontentloaded' });
+  await delay(3000);
+
+  await page.locator('#email').click();
+  await delay(300);
+  await page.locator('#email').fill('test@example.com');
+  await delay(500);
+
+  await page.locator('#password').click();
+  await delay(300);
+  await page.locator('#password').fill('SecurePass!123');
+  await delay(500);
+
+  await page.locator('button[type="submit"]').click();
+  await delay(5000);
+
+  const body = await page.locator('body').textContent();
+
+  const superHuman = body.includes('"superHumanSpeed": true');
+  const suspicious = body.includes('"suspiciousClientSideBehavior": true');
+  const cdpMouse = body.includes('"hasCDPMouseLeak": true');
+
+  console.log(`    superHumanSpeed: ${superHuman}`);
+  console.log(`    suspiciousClientSideBehavior: ${suspicious}`);
+  console.log(`    hasCDPMouseLeak: ${cdpMouse}`);
+
+  if (superHuman) throw new Error('superHumanSpeed detected');
+  if (suspicious) throw new Error('suspiciousClientSideBehavior detected');
+
+  if (body.includes('"isAutomatedWithCDP": true')) {
+    console.log('    [INFO] isAutomatedWithCDP=true — stealth issue, not humanize');
+  }
+
+  await browser.close();
+});
+
+await test('bot detection form timing (>3s)', async () => {
+  const browser = await launch({ headless: true, humanize: true, proxy: PROXY });
+  const page = await browser.newPage();
+  await page.goto('https://deviceandbrowserinfo.com/are_you_a_bot_interactions', { waitUntil: 'domcontentloaded' });
+  await delay(2000);
+
+  const t0 = Date.now();
+  await page.locator('#email').fill('test@example.com');
+  await page.locator('#password').fill('MyPassword!99');
+  await page.locator('button[type="submit"]').click();
+  const elapsed = Date.now() - t0;
+  await delay(3000);
+
+  console.log(`    Form fill + submit took: ${elapsed} ms`);
+  if (elapsed < 3000) throw new Error(`Form filled too fast: ${elapsed} ms`);
+
+  await browser.close();
+});
+
+// =========================================================================
+// 5. Patching integrity
+// =========================================================================
+console.log('\n' + '='.repeat(60));
+console.log('  PATCHING INTEGRITY');
+console.log('='.repeat(60));
+
+await test('page has _original after launch', async () => {
+  const browser = await launch({ headless: true, humanize: true });
+  const page = await browser.newPage();
+  if (!page._original) throw new Error('page._original missing');
+  if (!page._humanCfg) throw new Error('page._humanCfg missing');
+  if (!page._humanCursor) throw new Error('page._humanCursor missing');
+  await browser.close();
+});
+
+await test('page.click is humanized', async () => {
+  const browser = await launch({ headless: true, humanize: true });
+  const page = await browser.newPage();
+  const clickStr = page.click.toString();
+  if (!clickStr.includes('ensureCursorInit') && !clickStr.includes('humanClickFn') && !clickStr.includes('scrollToElement')) {
+    throw new Error('page.click does not appear humanized');
+  }
+  await browser.close();
+});
+
+await test('non-humanized page works normally', async () => {
+  const browser = await launch({ headless: true, humanize: false });
+  const page = await browser.newPage();
+  if (page._original) throw new Error('Non-humanized page should not have _original');
+
+  await page.goto('https://www.wikipedia.org', { waitUntil: 'domcontentloaded' });
+  await delay(1000);
+
+  const t0 = Date.now();
+  await page.locator('#searchInput').fill('test');
+  const elapsed = Date.now() - t0;
+  if (elapsed > 500) throw new Error(`Non-humanized fill too slow: ${elapsed} ms`);
+
+  await browser.close();
+});
+
+// =========================================================================
+// 6. Focus check — press skips click when focused
+// =========================================================================
+console.log('\n' + '='.repeat(60));
+console.log('  FOCUS CHECK (press / pressSequentially)');
+console.log('='.repeat(60));
+
+await test('press skips click when element already focused', async () => {
+  const browser = await launch({ headless: true, humanize: true });
+  const page = await browser.newPage();
+  await page.goto('https://www.wikipedia.org', { waitUntil: 'domcontentloaded' });
+  await delay(1000);
+
+  // Click input first to focus it
+  await page.locator('#searchInput').click();
+  await delay(300);
+
+  // Record mouse moves before pressing Enter
+  const movesBefore = [];
+  const origMove = page._humanOriginals.mouseMove;
+  let moveCount = 0;
+  page._humanOriginals.mouseMove = async (x, y, opts) => {
+    moveCount++;
+    return origMove(x, y, opts);
+  };
+
+  // Press Enter — element is already focused, should NOT trigger mouse move
+  const movesAtStart = moveCount;
+  await page.locator('#searchInput').press('a');
+  const movesUsed = moveCount - movesAtStart;
+
+  // Restore
+  page._humanOriginals.mouseMove = origMove;
+
+  // If focus check works, should be 0 moves (just keyboard press)
+  if (movesUsed > 0) {
+    console.log(`    [INFO] press() triggered ${movesUsed} mouse moves on focused element`);
+  }
+  // Lenient: allow some moves but not a full Bézier path (>10 would indicate a click)
+  if (movesUsed > 10) {
+    throw new Error(`press() moved mouse ${movesUsed} times on already-focused element — focus check broken`);
+  }
+
+  await browser.close();
+});
+
+// =========================================================================
+// 7. check/uncheck idle
+// =========================================================================
+console.log('\n' + '='.repeat(60));
+console.log('  CHECK/UNCHECK IDLE');
+console.log('='.repeat(60));
+
+await test('check() respects idle_between_actions config', async () => {
+  const cfg = resolveConfig('default', { idle_between_actions: true, idle_between_duration: [50, 100] });
+  if (!cfg.idle_between_actions) throw new Error('idle_between_actions should be true');
+  if (!cfg.idle_between_duration || cfg.idle_between_duration[0] !== 50) {
+    throw new Error('idle_between_duration not set');
+  }
+  // Verify config is carried through to page
+  const browser = await launch({ headless: true, humanize: true, humanize_config: { idle_between_actions: true } });
+  const page = await browser.newPage();
+  if (!page._humanCfg) throw new Error('page._humanCfg missing');
+  await browser.close();
+});
+
+// =========================================================================
+// 8. Frame patching completeness
+// =========================================================================
+console.log('\n' + '='.repeat(60));
+console.log('  FRAME PATCHING COMPLETENESS');
+console.log('='.repeat(60));
+
+await test('frame has all methods patched', async () => {
+  const browser = await launch({ headless: true, humanize: true });
+  const page = await browser.newPage();
+  await page.goto('https://www.wikipedia.org', { waitUntil: 'domcontentloaded' });
+  await delay(1000);
+
+  const mainFrame = page.mainFrame();
+  const expected = ['click', 'dblclick', 'hover', 'type', 'fill',
+                    'check', 'uncheck', 'selectOption', 'press',
+                    'clear', 'dragAndDrop'];
+  const missing = [];
+  for (const method of expected) {
+    if (typeof mainFrame[method] !== 'function') {
+      missing.push(method);
+    }
+  }
+  if (missing.length > 0) {
+    throw new Error(`Frame missing patched methods: ${missing.join(', ')}`);
+  }
+
+  // Verify they are patched (not original Playwright bindings)
+  if (!mainFrame._humanPatched) {
+    throw new Error('mainFrame._humanPatched flag not set');
+  }
+
+  await browser.close();
+});
+
+// =========================================================================
+// 9. drag_to safety — page._original check
+// =========================================================================
+console.log('\n' + '='.repeat(60));
+console.log('  DRAG_TO SAFETY');
+console.log('='.repeat(60));
+
+await test('page._humanCfg is accessible', async () => {
+  const browser = await launch({ headless: true, humanize: true });
+  const page = await browser.newPage();
+  if (!page._humanCfg) throw new Error('page._humanCfg not set');
+  if (!page._original) throw new Error('page._original not set');
+  if (typeof page._original.mouseDown !== 'function') throw new Error('mouseDown not preserved');
+  if (typeof page._original.mouseUp !== 'function') throw new Error('mouseUp not preserved');
+  await browser.close();
+});
+
+// =========================================================================
+// 10. patchBrowser.newPage uses original context
+// =========================================================================
+console.log('\n' + '='.repeat(60));
+console.log('  PATCH BROWSER — newPage context');
+console.log('='.repeat(60));
+
+await test('browser.newPage returns patched page', async () => {
+  const browser = await launch({ headless: true, humanize: true });
+  const page = await browser.newPage();
+  if (!page._original) throw new Error('page from browser.newPage() not patched');
+  if (!page._humanCfg) throw new Error('page._humanCfg missing from browser.newPage()');
+  await browser.close();
+});
+
+
+// =========================================================================
+// SUMMARY
+// =========================================================================
+console.log('\n' + '='.repeat(70));
+console.log('  TEST SUMMARY');
+console.log('='.repeat(70));
+
+const passed = results.filter(r => r.status === 'PASS').length;
+const failed = results.filter(r => r.status === 'FAIL').length;
+
+for (const r of results) {
+  const icon = r.status === 'PASS' ? 'OK' : 'XX';
+  console.log(`  [${icon}] ${r.name}`);
+}
+
+console.log(`\n  ${passed}/${results.length} passed, ${failed} failed`);
+if (failed === 0) console.log('  *** ALL JS TESTS PASSED ***');
+else console.log(`  *** ${failed} TESTS FAILED ***`);
+console.log('='.repeat(70));
+
+process.exit(failed === 0 ? 0 : 1);

tests/test_humanize_unit.py

@@ -0,0 +1,696 @@
+"""
+Unit + integration tests for the humanize layer.
+
+Fast unit tests (config, Bézier math, mocks) are proper test_ functions
+that pytest discovers automatically.
+
+Browser-dependent tests are marked @pytest.mark.slow and skipped in CI
+unless explicitly requested (pytest -m slow).
+
+Can also run directly: python tests/test_humanize_unit.py
+"""
+import math
+import time
+import sys
+
+import pytest
+
+
+# =========================================================================
+# Helper: ensure Locator class is patched before mock tests
+# =========================================================================
+
+def _ensure_locator_patched():
+    import cloakbrowser.human as h
+    h._locator_sync_patched = False
+    h._patch_locator_class_sync()
+
+
+# =========================================================================
+# Helper: fake RawMouse for Bézier tests
+# =========================================================================
+
+class _FakeRawMouse:
+    def __init__(self):
+        self.moves = []
+    def move(self, x, y, **kw):
+        self.moves.append((x, y))
+    def down(self, **kw):
+        pass
+    def up(self, **kw):
+        pass
+    def wheel(self, dx, dy):
+        pass
+
+
+# =========================================================================
+# 1. Config resolution
+# =========================================================================
+
+class TestConfigResolution:
+    def test_default_config_resolves(self):
+        from cloakbrowser.human.config import resolve_config, HumanConfig
+        cfg = resolve_config("default", None)
+        assert isinstance(cfg, HumanConfig)
+        assert cfg.mouse_min_steps > 0
+        assert cfg.mouse_max_steps > cfg.mouse_min_steps
+        assert len(cfg.initial_cursor_x) == 2
+        assert len(cfg.initial_cursor_y) == 2
+        assert cfg.typing_delay > 0
+
+    def test_careful_config_resolves(self):
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("careful", None)
+        default_cfg = resolve_config("default", None)
+        assert cfg.mouse_min_steps > 0
+        assert cfg.typing_delay >= default_cfg.typing_delay
+
+    def test_custom_override(self):
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("default", {"mouse_min_steps": 100, "mouse_max_steps": 200})
+        assert cfg.mouse_min_steps == 100
+        assert cfg.mouse_max_steps == 200
+
+    def test_invalid_preset_raises(self):
+        from cloakbrowser.human.config import resolve_config
+        with pytest.raises(ValueError, match="Unknown humanize preset"):
+            resolve_config("nonexistent", None)
+
+    def test_rand_within_bounds(self):
+        from cloakbrowser.human.config import rand, rand_range
+        for _ in range(200):
+            v = rand(10, 20)
+            assert 10 <= v <= 20
+        for _ in range(200):
+            v = rand_range([5, 15])
+            assert 5 <= v <= 15
+
+    def test_sleep_ms_timing(self):
+        from cloakbrowser.human.config import sleep_ms
+        t0 = time.time()
+        sleep_ms(50)
+        elapsed = (time.time() - t0) * 1000
+        assert elapsed >= 40
+        assert elapsed < 200
+
+
+# =========================================================================
+# 2. Bézier math
+# =========================================================================
+
+class TestBezierMath:
+    def test_generates_multiple_points(self):
+        from cloakbrowser.human.mouse import human_move
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("default", None)
+        raw = _FakeRawMouse()
+        human_move(raw, 0, 0, 500, 300, cfg)
+        assert len(raw.moves) >= 10
+        last_x, last_y = raw.moves[-1]
+        assert abs(last_x - 500) < 10
+        assert abs(last_y - 300) < 10
+
+    def test_smoothness_no_large_jumps(self):
+        from cloakbrowser.human.mouse import human_move
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("default", None)
+        raw = _FakeRawMouse()
+        human_move(raw, 0, 0, 400, 400, cfg)
+        total_dist = math.sqrt(400**2 + 400**2)
+        max_jump = total_dist * 0.5
+        for i in range(1, len(raw.moves)):
+            dx = raw.moves[i][0] - raw.moves[i-1][0]
+            dy = raw.moves[i][1] - raw.moves[i-1][1]
+            assert math.sqrt(dx*dx + dy*dy) < max_jump
+
+    def test_short_distance(self):
+        from cloakbrowser.human.mouse import human_move
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("default", None)
+        raw = _FakeRawMouse()
+        human_move(raw, 100, 100, 103, 102, cfg)
+        assert len(raw.moves) >= 1
+
+    def test_not_straight_line(self):
+        from cloakbrowser.human.mouse import human_move
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("default", None)
+        max_dev = 0
+        for _ in range(5):
+            raw = _FakeRawMouse()
+            human_move(raw, 0, 0, 500, 0, cfg)
+            dev = max(abs(y) for _, y in raw.moves)
+            if dev > max_dev:
+                max_dev = dev
+        assert max_dev > 0.5
+
+    def test_click_target_within_box(self):
+        from cloakbrowser.human.mouse import click_target
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("default", None)
+        box = {"x": 100, "y": 200, "width": 150, "height": 40}
+        for _ in range(50):
+            t = click_target(box, False, cfg)
+            assert 100 <= t.x <= 250
+            assert 200 <= t.y <= 240
+
+    def test_click_target_input_mode(self):
+        from cloakbrowser.human.mouse import click_target
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("default", None)
+        box = {"x": 50, "y": 50, "width": 200, "height": 30}
+        for _ in range(20):
+            t = click_target(box, True, cfg)
+            assert 50 <= t.x <= 250
+            assert 50 <= t.y <= 80
+
+
+# =========================================================================
+# 3. Async compatibility
+# =========================================================================
+
+class TestAsyncCompat:
+    def test_async_modules_import(self):
+        from cloakbrowser.human.mouse_async import AsyncRawMouse, async_human_move
+        from cloakbrowser.human.keyboard_async import AsyncRawKeyboard, async_human_type
+        from cloakbrowser.human.scroll_async import async_scroll_to_element
+        from cloakbrowser.human import patch_page_async, patch_browser_async, patch_context_async
+        assert callable(async_human_move)
+        assert callable(async_human_type)
+        assert callable(async_scroll_to_element)
+
+    def test_async_locator_patch(self):
+        import cloakbrowser.human as h
+        h._locator_async_patched = False
+        h._patch_locator_class_async()
+        assert h._locator_async_patched
+        from playwright.async_api._generated import Locator as AsyncLocator
+        assert 'humanized' in AsyncLocator.fill.__name__
+
+    def test_async_sleep_is_coroutine(self):
+        from cloakbrowser.human.config import async_sleep_ms
+        import asyncio
+        assert asyncio.iscoroutinefunction(async_sleep_ms)
+
+
+# =========================================================================
+# 4. Focus check — press / clear / pressSequentially
+# =========================================================================
+
+class TestFocusCheck:
+    def test_press_skips_click_when_focused(self):
+        _ensure_locator_patched()
+        from unittest.mock import MagicMock, patch as mock_patch
+        page = MagicMock()
+        page._original = MagicMock()
+        page._human_cfg = MagicMock()
+        page._human_cfg.idle_between_actions = False
+
+        with mock_patch("cloakbrowser.human._is_selector_focused", return_value=True):
+            from playwright.sync_api._generated import Locator
+            loc = MagicMock()
+            loc.page = page
+            loc._impl_obj = MagicMock()
+            loc._impl_obj._selector = "#test"
+            Locator.press(loc, "Enter")
+
+        page.click.assert_not_called()
+
+    def test_press_clicks_when_not_focused(self):
+        _ensure_locator_patched()
+        from unittest.mock import MagicMock, patch as mock_patch
+        page = MagicMock()
+        page._original = MagicMock()
+        page._human_cfg = MagicMock()
+        page._human_cfg.idle_between_actions = False
+
+        with mock_patch("cloakbrowser.human._is_selector_focused", return_value=False):
+            from playwright.sync_api._generated import Locator
+            loc = MagicMock()
+            loc.page = page
+            loc._impl_obj = MagicMock()
+            loc._impl_obj._selector = "#test"
+            Locator.press(loc, "Enter")
+
+        page.click.assert_called_with("#test")
+
+
+# =========================================================================
+# 5. check/uncheck idle
+# =========================================================================
+
+class TestCheckUncheckIdle:
+    def test_check_calls_idle_when_enabled(self):
+        _ensure_locator_patched()
+        from unittest.mock import MagicMock, patch as mock_patch
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("default", {"idle_between_actions": True, "idle_between_duration": [50, 100]})
+
+        page = MagicMock()
+        page._original = MagicMock()
+        page._original.mouse_move = MagicMock()
+        page._human_cfg = cfg
+
+        idle_called = {"n": 0}
+        def fake_idle(*a, **kw):
+            idle_called["n"] += 1
+
+        from playwright.sync_api._generated import Locator
+        loc = MagicMock()
+        loc.page = page
+        loc._impl_obj = MagicMock()
+        loc._impl_obj._selector = "#checkbox"
+        loc.is_checked = MagicMock(return_value=False)
+
+        with mock_patch("cloakbrowser.human.human_idle", fake_idle):
+            Locator.check(loc)
+
+        assert idle_called["n"] >= 1
+
+    def test_uncheck_calls_idle_when_enabled(self):
+        _ensure_locator_patched()
+        from unittest.mock import MagicMock, patch as mock_patch
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("default", {"idle_between_actions": True, "idle_between_duration": [50, 100]})
+
+        page = MagicMock()
+        page._original = MagicMock()
+        page._original.mouse_move = MagicMock()
+        page._human_cfg = cfg
+
+        idle_called = {"n": 0}
+        def fake_idle(*a, **kw):
+            idle_called["n"] += 1
+
+        from playwright.sync_api._generated import Locator
+        loc = MagicMock()
+        loc.page = page
+        loc._impl_obj = MagicMock()
+        loc._impl_obj._selector = "#checkbox"
+        loc.is_checked = MagicMock(return_value=True)
+
+        with mock_patch("cloakbrowser.human.human_idle", fake_idle):
+            Locator.uncheck(loc)
+
+        assert idle_called["n"] >= 1
+
+
+# =========================================================================
+# 6. Frame patching completeness
+# =========================================================================
+
+class TestFramePatching:
+    def test_all_11_methods_patched(self):
+        from cloakbrowser.human import _patch_single_frame_sync, _CursorState
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock
+
+        cfg = resolve_config("default", None)
+        cursor = _CursorState()
+        page = MagicMock()
+        page._original = MagicMock()
+        frame = MagicMock()
+        frame._human_patched = False
+
+        _patch_single_frame_sync(frame, page, cfg, cursor, MagicMock(), MagicMock(), page._original)
+
+        expected = ['click', 'dblclick', 'hover', 'type', 'fill',
+                    'check', 'uncheck', 'select_option', 'press',
+                    'clear', 'drag_and_drop']
+        for method in expected:
+            fn = getattr(frame, method)
+            assert not isinstance(fn, MagicMock), f"frame.{method} was not patched"
+
+
+# =========================================================================
+# 7. drag_to safety
+# =========================================================================
+
+class TestDragToSafety:
+    def test_handles_missing_original(self):
+        _ensure_locator_patched()
+        from playwright.sync_api._generated import Locator
+        from unittest.mock import MagicMock
+
+        page = MagicMock()
+        page._original = None
+
+        source_loc = MagicMock()
+        source_loc.page = page
+        source_loc._impl_obj = MagicMock()
+        source_loc._impl_obj._selector = "#src"
+        source_loc.bounding_box = MagicMock(return_value={"x": 10, "y": 10, "width": 50, "height": 50})
+
+        target_loc = MagicMock()
+        target_loc.page = page
+        target_loc._impl_obj = MagicMock()
+        target_loc._impl_obj._selector = "#tgt"
+        target_loc.bounding_box = MagicMock(return_value={"x": 200, "y": 200, "width": 50, "height": 50})
+
+        try:
+            Locator.drag_to(source_loc, target_loc)
+        except AttributeError:
+            pytest.fail("drag_to crashed without page._original")
+
+
+# =========================================================================
+# 8. Page config persistence
+# =========================================================================
+
+class TestPageConfigPersistence:
+    def test_resolve_config_has_all_fields(self):
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("default")
+        required = ["mouse_min_steps", "mouse_max_steps", "typing_delay",
+                    "initial_cursor_x", "initial_cursor_y", "idle_between_actions",
+                    "idle_between_duration", "field_switch_delay",
+                    "mistype_chance", "mistype_delay_notice", "mistype_delay_correct"]
+        for field in required:
+            assert hasattr(cfg, field), f"Config missing field: {field}"
+
+
+# =========================================================================
+# 9. Mistype config
+# =========================================================================
+
+class TestMistypeConfig:
+    def test_default_mistype_chance(self):
+        from cloakbrowser.human.config import resolve_config
+        cfg = resolve_config("default")
+        assert 0 < cfg.mistype_chance < 1
+        assert len(cfg.mistype_delay_notice) == 2
+        assert len(cfg.mistype_delay_correct) == 2
+
+    def test_careful_mistype_higher(self):
+        from cloakbrowser.human.config import resolve_config
+        default = resolve_config("default")
+        careful = resolve_config("careful")
+        assert careful.mistype_chance >= default.mistype_chance
+
+
+# =========================================================================
+# 10. Select-all platform detection
+# =========================================================================
+
+class TestSelectAllPlatform:
+    def test_select_all_constant_exists(self):
+        from cloakbrowser.human import _SELECT_ALL
+        assert _SELECT_ALL in ("Meta+a", "Control+a")
+
+    def test_select_all_matches_platform(self):
+        import sys
+        from cloakbrowser.human import _SELECT_ALL
+        if sys.platform == "darwin":
+            assert _SELECT_ALL == "Meta+a"
+        else:
+            assert _SELECT_ALL == "Control+a"
+
+
+# =========================================================================
+# 11. Non-ASCII keyboard input
+# =========================================================================
+
+class TestNonAsciiKeyboard:
+    def test_cyrillic_uses_insert_text(self):
+        from cloakbrowser.human.keyboard import human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock
+
+        cfg = resolve_config("default", {"mistype_chance": 0})
+        page = MagicMock()
+        raw = MagicMock()
+
+        down_keys = []
+        inserted = []
+        raw.down = MagicMock(side_effect=lambda k: down_keys.append(k))
+        raw.up = MagicMock()
+        raw.insert_text = MagicMock(side_effect=lambda t: inserted.append(t))
+
+        human_type(page, raw, "Привет", cfg)
+
+        assert "".join(inserted) == "Привет"
+        for k in down_keys:
+            assert ord(k[0]) < 128 or k in ("Shift", "Backspace")
+
+    def test_mixed_ascii_cyrillic(self):
+        from cloakbrowser.human.keyboard import human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock
+
+        cfg = resolve_config("default", {"mistype_chance": 0})
+        page = MagicMock()
+        raw = MagicMock()
+
+        down_keys = []
+        inserted = []
+        raw.down = MagicMock(side_effect=lambda k: down_keys.append(k))
+        raw.up = MagicMock()
+        raw.insert_text = MagicMock(side_effect=lambda t: inserted.append(t))
+
+        human_type(page, raw, "Hi Мир", cfg)
+
+        assert "H" in down_keys
+        assert "i" in down_keys
+        assert "М" in "".join(inserted)
+
+    def test_cjk_uses_insert_text(self):
+        from cloakbrowser.human.keyboard import human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock
+
+        cfg = resolve_config("default", {"mistype_chance": 0})
+        page = MagicMock()
+        raw = MagicMock()
+
+        inserted = []
+        raw.down = MagicMock()
+        raw.up = MagicMock()
+        raw.insert_text = MagicMock(side_effect=lambda t: inserted.append(t))
+
+        human_type(page, raw, "你好", cfg)
+
+        assert "".join(inserted) == "你好"
+
+    def test_mistype_only_ascii(self):
+        from cloakbrowser.human.keyboard import human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock
+
+        cfg = resolve_config("default", {"mistype_chance": 1.0})
+        page = MagicMock()
+        raw = MagicMock()
+
+        down_keys = []
+        raw.down = MagicMock(side_effect=lambda k: down_keys.append(k))
+        raw.up = MagicMock()
+        raw.insert_text = MagicMock()
+
+        human_type(page, raw, "AБ", cfg)
+
+        assert "Backspace" in down_keys
+
+    def test_no_error_on_cyrillic(self):
+        from cloakbrowser.human.keyboard import human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock
+
+        cfg = resolve_config("default", {"mistype_chance": 0})
+        page = MagicMock()
+        raw = MagicMock()
+        raw.down = MagicMock()
+        raw.up = MagicMock()
+        raw.insert_text = MagicMock()
+
+        # Should not raise
+        human_type(page, raw, "Тест кириллицы", cfg)
+
+
+class TestNonAsciiKeyboardAsync:
+    @pytest.mark.asyncio
+    async def test_async_cyrillic_uses_insert_text(self):
+        from cloakbrowser.human.keyboard_async import async_human_type
+        from cloakbrowser.human.config import resolve_config
+        from unittest.mock import MagicMock, AsyncMock
+
+        cfg = resolve_config("default", {"mistype_chance": 0})
+        page = MagicMock()
+        raw = MagicMock()
+
+        inserted = []
+        raw.down = AsyncMock()
+        raw.up = AsyncMock()
+        raw.insert_text = AsyncMock(side_effect=lambda t: inserted.append(t))
+
+        await async_human_type(page, raw, "Привет", cfg)
+
+        assert "".join(inserted) == "Привет"
+
+
+
+# =========================================================================
+# SLOW TESTS — require browser (skipped in CI unless pytest -m slow)
+# =========================================================================
+
+@pytest.mark.slow
+class TestBrowserFill:
+    def test_fill_clears_existing(self):
+        from cloakbrowser import launch
+        browser = launch(headless=True, humanize=True)
+        page = browser.new_page()
+        page.goto('https://www.wikipedia.org', wait_until='domcontentloaded')
+        time.sleep(1)
+        page.locator('#searchInput').type('initial text')
+        time.sleep(0.5)
+        page.locator('#searchInput').fill('replaced text')
+        time.sleep(0.5)
+        val = page.locator('#searchInput').input_value()
+        assert val == 'replaced text'
+        assert 'initial' not in val
+        browser.close()
+
+    def test_fill_timing_humanized(self):
+        from cloakbrowser import launch
+        browser = launch(headless=True, humanize=True)
+        page = browser.new_page()
+        page.goto('https://www.wikipedia.org', wait_until='domcontentloaded')
+        time.sleep(1)
+        t0 = time.time()
+        page.locator('#searchInput').fill('Human speed test')
+        elapsed_ms = int((time.time() - t0) * 1000)
+        assert elapsed_ms > 1000
+        browser.close()
+
+    def test_clear_empties_field(self):
+        from cloakbrowser import launch
+        browser = launch(headless=True, humanize=True)
+        page = browser.new_page()
+        page.goto('https://www.wikipedia.org', wait_until='domcontentloaded')
+        time.sleep(1)
+        page.locator('#searchInput').fill('some text')
+        time.sleep(0.5)
+        page.locator('#searchInput').clear()
+        time.sleep(0.5)
+        val = page.locator('#searchInput').input_value()
+        assert val == ''
+        browser.close()
+
+
+@pytest.mark.slow
+class TestBrowserPatching:
+    def test_page_has_original(self):
+        from cloakbrowser import launch
+        browser = launch(headless=True, humanize=True)
+        page = browser.new_page()
+        assert hasattr(page, '_original')
+        assert hasattr(page, '_human_cfg')
+        browser.close()
+
+    def test_locator_methods_patched(self):
+        from cloakbrowser import launch
+        browser = launch(headless=True, humanize=True)
+        page = browser.new_page()
+        from playwright.sync_api._generated import Locator
+        methods = ['fill', 'click', 'type', 'dblclick', 'hover', 'check', 'uncheck',
+                   'set_checked', 'select_option', 'press', 'press_sequentially',
+                   'tap', 'drag_to', 'clear']
+        for method in methods:
+            fn = getattr(Locator, method)
+            assert 'humanized' in fn.__name__, f"{method} not patched"
+        browser.close()
+
+    def test_non_humanized_page_normal(self):
+        from playwright.sync_api import sync_playwright
+        with sync_playwright() as p:
+            browser = p.chromium.launch(headless=True)
+            page = browser.new_page()
+            assert not hasattr(page, '_original')
+            browser.close()
+
+    def test_page_human_cfg_persists(self):
+        from cloakbrowser import launch
+        browser = launch(headless=True, humanize=True)
+        page = browser.new_page()
+        assert page._human_cfg is not None
+        assert hasattr(page._human_cfg, 'idle_between_actions')
+        assert hasattr(page._human_cfg, 'mistype_chance')
+        browser.close()
+
+
+@pytest.mark.slow
+class TestBrowserBotDetection:
+    PROXY = ''
+
+    def test_behavioral_checks_pass(self):
+        from cloakbrowser import launch
+        browser = launch(headless=False, humanize=True, proxy=self.PROXY, geoip=True)
+        page = browser.new_page()
+        page.goto('https://deviceandbrowserinfo.com/are_you_a_bot_interactions',
+                   wait_until='domcontentloaded')
+        time.sleep(3)
+        page.locator('#email').click()
+        time.sleep(0.3)
+        page.locator('#email').fill('test@example.com')
+        time.sleep(0.5)
+        page.locator('#password').click()
+        time.sleep(0.3)
+        page.locator('#password').fill('SecurePass!123')
+        time.sleep(0.5)
+        page.locator('button[type="submit"]').click()
+        time.sleep(5)
+        body = page.locator('body').text_content()
+        assert '"superHumanSpeed": true' not in body
+        assert '"suspiciousClientSideBehavior": true' not in body
+        browser.close()
+
+    def test_form_timing(self):
+        from cloakbrowser import launch
+        browser = launch(headless=True, humanize=True, proxy=self.PROXY, geoip=True)
+        page = browser.new_page()
+        page.goto('https://deviceandbrowserinfo.com/are_you_a_bot_interactions',
+                   wait_until='domcontentloaded')
+        time.sleep(2)
+        t0 = time.time()
+        page.locator('#email').fill('test@example.com')
+        page.locator('#password').fill('MyPassword!99')
+        page.locator('button[type="submit"]').click()
+        elapsed_ms = int((time.time() - t0) * 1000)
+        time.sleep(3)
+        assert elapsed_ms > 3000
+        browser.close()
+
+
+@pytest.mark.slow
+class TestAsyncEndToEnd:
+    def test_async_launch_click_fill(self):
+        """launch_async(humanize=True) — async page.click and page.fill work end-to-end."""
+        import asyncio
+        from cloakbrowser import launch_async
+
+        async def _run():
+            browser = await launch_async(headless=True, humanize=True)
+            page = await browser.new_page()
+            assert hasattr(page, '_original'), "async page not patched"
+            assert hasattr(page, '_human_cfg'), "async page missing _human_cfg"
+
+            await page.goto('https://www.wikipedia.org', wait_until='domcontentloaded')
+            await asyncio.sleep(1)
+
+            t0 = time.time()
+            await page.locator('#searchInput').fill('async test')
+            elapsed_ms = int((time.time() - t0) * 1000)
+            assert elapsed_ms > 500, f"async fill too fast: {elapsed_ms}ms"
+
+            val = await page.locator('#searchInput').input_value()
+            assert val == 'async test', f"async fill wrong value: {val}"
+
+            await browser.close()
+
+        asyncio.run(_run())
+
+
+# =========================================================================
+# Direct runner (backwards compat)
+# =========================================================================
+
+if __name__ == "__main__":
+    sys.exit(pytest.main([__file__, "-v", "--tb=short", "-x"]))

tests/test_launch.py

@@ -1,7 +1,8 @@
 """Basic launch tests for cloakbrowser."""
 
 import pytest
-from cloakbrowser import launch, launch_async, binary_info, CHROMIUM_VERSION
+from cloakbrowser import launch, launch_async, binary_info
+from cloakbrowser.config import get_chromium_version
 
 
 def test_binary_info():
@@ -11,7 +12,7 @@ def test_binary_info():
     assert "platform" in info
     assert "binary_path" in info
     assert "installed" in info
-    assert info["version"] == CHROMIUM_VERSION
+    assert info["version"] == get_chromium_version()
 
 
 def test_launch_and_close():

tests/test_launch_context.py

@@ -0,0 +1,209 @@
+"""Unit tests for launch_context() — context kwargs, viewport defaults, close cleanup."""
+
+from unittest.mock import MagicMock, call, patch
+
+import pytest
+
+from cloakbrowser.config import DEFAULT_VIEWPORT
+
+
+# All tests mock launch() to avoid needing a binary.
+# launch_context() calls launch() internally, then browser.new_context().
+
+
+def _make_mock_browser():
+    """Create a mock browser with new_context() returning a mock context."""
+    browser = MagicMock()
+    context = MagicMock()
+    browser.new_context.return_value = context
+    return browser, context
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser.launch")
+def test_default_viewport(mock_launch, _mock_bin):
+    """DEFAULT_VIEWPORT applied when no viewport given."""
+    browser, context = _make_mock_browser()
+    mock_launch.return_value = browser
+
+    from cloakbrowser.browser import launch_context
+    launch_context()
+
+    ctx_kwargs = browser.new_context.call_args
+    assert ctx_kwargs[1]["viewport"] == DEFAULT_VIEWPORT
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser.launch")
+def test_custom_viewport(mock_launch, _mock_bin):
+    """Custom viewport overrides DEFAULT_VIEWPORT."""
+    browser, context = _make_mock_browser()
+    mock_launch.return_value = browser
+
+    from cloakbrowser.browser import launch_context
+    custom = {"width": 1280, "height": 720}
+    launch_context(viewport=custom)
+
+    ctx_kwargs = browser.new_context.call_args
+    assert ctx_kwargs[1]["viewport"] == custom
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser.launch")
+def test_user_agent(mock_launch, _mock_bin):
+    """user_agent forwarded to new_context()."""
+    browser, context = _make_mock_browser()
+    mock_launch.return_value = browser
+
+    from cloakbrowser.browser import launch_context
+    launch_context(user_agent="Mozilla/5.0 Custom")
+
+    ctx_kwargs = browser.new_context.call_args
+    assert ctx_kwargs[1]["user_agent"] == "Mozilla/5.0 Custom"
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser.launch")
+def test_locale_forwarded(mock_launch, _mock_bin):
+    """locale flows to launch() for --lang binary flag, NOT to new_context() CDP."""
+    browser, context = _make_mock_browser()
+    mock_launch.return_value = browser
+
+    from cloakbrowser.browser import launch_context
+    launch_context(locale="de-DE")
+
+    # Locale in launch() call (for --lang binary flag)
+    assert mock_launch.call_args[1]["locale"] == "de-DE"
+    # NOT in new_context() — would trigger detectable CDP emulation
+    ctx_kwargs = browser.new_context.call_args
+    assert "locale" not in ctx_kwargs[1]
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser.launch")
+def test_timezone_via_binary_not_cdp(mock_launch, _mock_bin):
+    """timezone passed to launch() for binary flag, NOT to new_context() CDP.
+
+    --fingerprint-timezone is process-wide (reads CommandLine in renderer),
+    so it applies to ALL contexts, not just the default one.
+    """
+    browser, context = _make_mock_browser()
+    mock_launch.return_value = browser
+
+    from cloakbrowser.browser import launch_context
+    launch_context(timezone="America/New_York")
+
+    # timezone in launch() — binary flag set
+    assert mock_launch.call_args[1]["timezone"] == "America/New_York"
+    # NOT in new_context() — no CDP emulation
+    ctx_kwargs = browser.new_context.call_args
+    assert "timezone_id" not in ctx_kwargs[1]
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser.launch")
+def test_color_scheme(mock_launch, _mock_bin):
+    """color_scheme forwarded to new_context()."""
+    browser, context = _make_mock_browser()
+    mock_launch.return_value = browser
+
+    from cloakbrowser.browser import launch_context
+    launch_context(color_scheme="dark")
+
+    ctx_kwargs = browser.new_context.call_args
+    assert ctx_kwargs[1]["color_scheme"] == "dark"
+
+
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=("Europe/Berlin", "de-DE"))
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser.launch")
+def test_geoip_resolution(mock_launch, _mock_bin, _mock_geoip):
+    """geoip fills timezone+locale, both flow to binary args only."""
+    browser, context = _make_mock_browser()
+    mock_launch.return_value = browser
+
+    from cloakbrowser.browser import launch_context
+    launch_context(proxy="http://proxy:8080", geoip=True)
+
+    # Both go to launch() for binary flags
+    assert mock_launch.call_args[1]["locale"] == "de-DE"
+    assert mock_launch.call_args[1]["timezone"] == "Europe/Berlin"
+    # Neither in context — no CDP emulation
+    ctx_kwargs = browser.new_context.call_args
+    assert "timezone_id" not in ctx_kwargs[1]
+    assert "locale" not in ctx_kwargs[1]
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser.launch")
+def test_timezone_id_alias(mock_launch, _mock_bin):
+    """timezone_id kwarg accepted as alias for timezone."""
+    browser, context = _make_mock_browser()
+    mock_launch.return_value = browser
+
+    from cloakbrowser.browser import launch_context
+    launch_context(timezone_id="Europe/Paris")
+
+    # Resolved value flows to launch() for binary flag
+    assert mock_launch.call_args[1]["timezone"] == "Europe/Paris"
+    # NOT in context — no CDP emulation
+    ctx_kwargs = browser.new_context.call_args
+    assert "timezone_id" not in ctx_kwargs[1]
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser.launch")
+def test_close_closes_browser(mock_launch, _mock_bin):
+    """context.close() also calls browser.close()."""
+    browser, context = _make_mock_browser()
+    # Save reference before launch_context() monkey-patches context.close
+    original_ctx_close = context.close
+    mock_launch.return_value = browser
+
+    from cloakbrowser.browser import launch_context
+    ctx = launch_context()
+
+    # The returned context has a patched close()
+    ctx.close()
+    # Original context close was called
+    original_ctx_close.assert_called_once()
+    # Browser close was also called
+    browser.close.assert_called_once()
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser.launch")
+def test_error_closes_browser(mock_launch, _mock_bin):
+    """If new_context() raises, browser is still closed."""
+    browser = MagicMock()
+    browser.new_context.side_effect = RuntimeError("context creation failed")
+    mock_launch.return_value = browser
+
+    from cloakbrowser.browser import launch_context
+    with pytest.raises(RuntimeError, match="context creation failed"):
+        launch_context()
+
+    browser.close.assert_called_once()
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser.launch")
+def test_kwargs_passthrough(mock_launch, _mock_bin):
+    """Extra kwargs forwarded to new_context(), NOT to launch().
+
+    Important contract: kwargs like record_video_dir go to context creation,
+    not browser launch.
+    """
+    browser, context = _make_mock_browser()
+    mock_launch.return_value = browser
+
+    from cloakbrowser.browser import launch_context
+    launch_context(record_video_dir="/tmp/videos")
+
+    # Verify kwarg reached new_context()
+    ctx_kwargs = browser.new_context.call_args
+    assert ctx_kwargs[1]["record_video_dir"] == "/tmp/videos"
+
+    # Verify kwarg did NOT leak to launch()
+    launch_kwargs = mock_launch.call_args[1]
+    assert "record_video_dir" not in launch_kwargs

tests/test_persistent_context.py

@@ -0,0 +1,259 @@
+"""Unit tests for launch_persistent_context() and launch_persistent_context_async().
+
+All tests mock playwright to avoid needing a binary.
+"""
+
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+from cloakbrowser.config import DEFAULT_VIEWPORT
+
+
+def _make_mock_pw_and_context():
+    """Create mock sync_playwright chain returning a mock context."""
+    context = MagicMock()
+    pw = MagicMock()
+    pw.chromium.launch_persistent_context.return_value = context
+    pw_cm = MagicMock()
+    pw_cm.start.return_value = pw
+    return pw_cm, pw, context
+
+
+# ---------------------------------------------------------------------------
+# Sync: launch_persistent_context()
+# ---------------------------------------------------------------------------
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=(None, None))
+def test_persistent_context_args_built(_mock_geoip, _mock_bin):
+    """Stealth args + extra args combined correctly."""
+    pw_cm, pw, context = _make_mock_pw_and_context()
+
+    with patch("playwright.sync_api.sync_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context
+        launch_persistent_context("/tmp/profile", args=["--disable-gpu"])
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    assert "--disable-gpu" in call_kwargs["args"]
+    # Stealth args present by default
+    assert any(a.startswith("--fingerprint=") for a in call_kwargs["args"])
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=(None, None))
+def test_persistent_context_default_viewport(_mock_geoip, _mock_bin):
+    """DEFAULT_VIEWPORT applied when no viewport given."""
+    pw_cm, pw, context = _make_mock_pw_and_context()
+
+    with patch("playwright.sync_api.sync_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context
+        launch_persistent_context("/tmp/profile")
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    assert call_kwargs["viewport"] == DEFAULT_VIEWPORT
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=(None, None))
+def test_persistent_context_custom_viewport(_mock_geoip, _mock_bin):
+    """Custom viewport overrides DEFAULT_VIEWPORT."""
+    pw_cm, pw, context = _make_mock_pw_and_context()
+    custom = {"width": 1280, "height": 720}
+
+    with patch("playwright.sync_api.sync_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context
+        launch_persistent_context("/tmp/profile", viewport=custom)
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    assert call_kwargs["viewport"] == custom
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=(None, None))
+def test_persistent_context_user_agent(_mock_geoip, _mock_bin):
+    """user_agent forwarded to launch_persistent_context()."""
+    pw_cm, pw, context = _make_mock_pw_and_context()
+
+    with patch("playwright.sync_api.sync_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context
+        launch_persistent_context("/tmp/profile", user_agent="Custom/1.0")
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    assert call_kwargs["user_agent"] == "Custom/1.0"
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+def test_persistent_context_locale_and_timezone(_mock_bin):
+    """Timezone and locale flow to binary args only, NOT to CDP context kwargs."""
+    pw_cm, pw, context = _make_mock_pw_and_context()
+
+    with patch("playwright.sync_api.sync_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context
+        launch_persistent_context("/tmp/profile", timezone="Asia/Tokyo", locale="ja-JP")
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    # Binary args (native, undetectable)
+    assert "--fingerprint-timezone=Asia/Tokyo" in call_kwargs["args"]
+    assert "--lang=ja-JP" in call_kwargs["args"]
+    # NOT in context kwargs (would trigger detectable CDP emulation)
+    assert "timezone_id" not in call_kwargs
+    assert "locale" not in call_kwargs
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=(None, None))
+def test_persistent_context_color_scheme(_mock_geoip, _mock_bin):
+    """color_scheme forwarded correctly."""
+    pw_cm, pw, context = _make_mock_pw_and_context()
+
+    with patch("playwright.sync_api.sync_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context
+        launch_persistent_context("/tmp/profile", color_scheme="dark")
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    assert call_kwargs["color_scheme"] == "dark"
+
+
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=("Europe/Berlin", "de-DE"))
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+def test_persistent_context_geoip(_mock_bin, _mock_geoip):
+    """geoip fills missing tz/locale — flows to binary args, not CDP context."""
+    pw_cm, pw, context = _make_mock_pw_and_context()
+
+    with patch("playwright.sync_api.sync_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context
+        launch_persistent_context("/tmp/profile", proxy="http://proxy:8080", geoip=True)
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    # Binary args
+    assert "--fingerprint-timezone=Europe/Berlin" in call_kwargs["args"]
+    assert "--lang=de-DE" in call_kwargs["args"]
+    # NOT in context kwargs
+    assert "timezone_id" not in call_kwargs
+    assert "locale" not in call_kwargs
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+def test_persistent_context_timezone_id_alias(_mock_bin):
+    """timezone_id kwarg accepted as alias for timezone."""
+    pw_cm, pw, context = _make_mock_pw_and_context()
+
+    with patch("playwright.sync_api.sync_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context
+        launch_persistent_context("/tmp/profile", timezone_id="Europe/Paris")
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    assert "--fingerprint-timezone=Europe/Paris" in call_kwargs["args"]
+    assert "timezone_id" not in call_kwargs
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=(None, None))
+def test_persistent_context_close_stops_pw(_mock_geoip, _mock_bin):
+    """context.close() also calls pw.stop()."""
+    pw_cm, pw, context = _make_mock_pw_and_context()
+    original_close = context.close
+
+    with patch("playwright.sync_api.sync_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context
+        ctx = launch_persistent_context("/tmp/profile")
+
+    ctx.close()
+    original_close.assert_called_once()
+    pw.stop.assert_called_once()
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=(None, None))
+def test_persistent_context_proxy_string(_mock_geoip, _mock_bin):
+    """Proxy string parsed and passed."""
+    pw_cm, pw, context = _make_mock_pw_and_context()
+
+    with patch("playwright.sync_api.sync_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context
+        launch_persistent_context("/tmp/profile", proxy="http://user:pass@proxy:8080")
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    assert call_kwargs["proxy"]["server"] == "http://proxy:8080"
+    assert call_kwargs["proxy"]["username"] == "user"
+    assert call_kwargs["proxy"]["password"] == "pass"
+
+
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=(None, None))
+def test_persistent_context_proxy_dict(_mock_geoip, _mock_bin):
+    """Proxy dict passed through."""
+    pw_cm, pw, context = _make_mock_pw_and_context()
+    proxy_dict = {"server": "http://proxy:8080", "bypass": ".google.com"}
+
+    with patch("playwright.sync_api.sync_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context
+        launch_persistent_context("/tmp/profile", proxy=proxy_dict)
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    assert call_kwargs["proxy"] == proxy_dict
+
+
+# ---------------------------------------------------------------------------
+# Async: launch_persistent_context_async()
+# ---------------------------------------------------------------------------
+
+
+def _make_mock_async_pw_and_context():
+    """Create mock async_playwright chain returning a mock context."""
+    context = AsyncMock()
+    pw = AsyncMock()
+    pw.chromium.launch_persistent_context.return_value = context
+    pw_cm = AsyncMock()
+    pw_cm.start.return_value = pw
+    return pw_cm, pw, context
+
+
+@pytest.mark.asyncio
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=(None, None))
+async def test_persistent_context_async_args_built(_mock_geoip, _mock_bin):
+    """Async launch builds args correctly."""
+    pw_cm, pw, context = _make_mock_async_pw_and_context()
+
+    with patch("playwright.async_api.async_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context_async
+        await launch_persistent_context_async("/tmp/profile", args=["--disable-gpu"])
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    assert "--disable-gpu" in call_kwargs["args"]
+    assert any(a.startswith("--fingerprint=") for a in call_kwargs["args"])
+
+
+@pytest.mark.asyncio
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+@patch("cloakbrowser.browser._maybe_resolve_geoip", return_value=(None, None))
+async def test_persistent_context_async_close_stops_pw(_mock_geoip, _mock_bin):
+    """await context.close() calls await pw.stop()."""
+    pw_cm, pw, context = _make_mock_async_pw_and_context()
+    original_close = context.close
+
+    with patch("playwright.async_api.async_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context_async
+        ctx = await launch_persistent_context_async("/tmp/profile")
+
+    await ctx.close()
+    original_close.assert_called_once()
+    pw.stop.assert_called_once()
+
+
+@pytest.mark.asyncio
+@patch("cloakbrowser.browser.ensure_binary", return_value="/fake/chrome")
+async def test_persistent_context_async_timezone_id_alias(_mock_bin):
+    """timezone_id kwarg accepted as alias in async path."""
+    pw_cm, pw, context = _make_mock_async_pw_and_context()
+
+    with patch("playwright.async_api.async_playwright", return_value=pw_cm):
+        from cloakbrowser.browser import launch_persistent_context_async
+        await launch_persistent_context_async("/tmp/profile", timezone_id="Europe/Paris")
+
+    call_kwargs = pw.chromium.launch_persistent_context.call_args[1]
+    assert "--fingerprint-timezone=Europe/Paris" in call_kwargs["args"]
+    assert "timezone_id" not in call_kwargs

tests/test_proxy.py

@@ -0,0 +1,153 @@
+"""Tests for proxy URL parsing and credential extraction."""
+
+from unittest.mock import patch
+
+from cloakbrowser.browser import _build_proxy_kwargs, _maybe_resolve_geoip, _parse_proxy_url
+
+
+class TestParseProxyUrl:
+    def test_no_credentials(self):
+        assert _parse_proxy_url("http://proxy:8080") == {"server": "http://proxy:8080"}
+
+    def test_with_credentials(self):
+        result = _parse_proxy_url("http://user:pass@proxy:8080")
+        assert result == {"server": "http://proxy:8080", "username": "user", "password": "pass"}
+
+    def test_url_encoded_password(self):
+        result = _parse_proxy_url("http://user:p%40ss%3Aword@proxy:8080")
+        assert result["password"] == "p@ss:word"
+        assert result["username"] == "user"
+        assert result["server"] == "http://proxy:8080"
+
+    def test_socks5(self):
+        result = _parse_proxy_url("socks5://user:pass@proxy:1080")
+        assert result["server"] == "socks5://proxy:1080"
+        assert result["username"] == "user"
+        assert result["password"] == "pass"
+
+    def test_no_port(self):
+        result = _parse_proxy_url("http://user:pass@proxy")
+        assert result["server"] == "http://proxy"
+        assert result["username"] == "user"
+
+    def test_username_only(self):
+        result = _parse_proxy_url("http://user@proxy:8080")
+        assert result["server"] == "http://proxy:8080"
+        assert result["username"] == "user"
+        assert "password" not in result
+
+
+class TestBuildProxyKwargs:
+    def test_none(self):
+        assert _build_proxy_kwargs(None) == {}
+
+    def test_simple_proxy(self):
+        result = _build_proxy_kwargs("http://proxy:8080")
+        assert result == {"proxy": {"server": "http://proxy:8080"}}
+
+    def test_proxy_with_auth(self):
+        result = _build_proxy_kwargs("http://user:pass@proxy:8080")
+        assert result == {
+            "proxy": {"server": "http://proxy:8080", "username": "user", "password": "pass"}
+        }
+
+    def test_proxy_dict_passthrough(self):
+        proxy_dict = {"server": "http://proxy:8080", "bypass": ".google.com,localhost"}
+        result = _build_proxy_kwargs(proxy_dict)
+        assert result == {"proxy": proxy_dict}
+
+    def test_proxy_dict_with_auth(self):
+        proxy_dict = {
+            "server": "http://proxy:8080",
+            "username": "user",
+            "password": "pass",
+            "bypass": ".example.com",
+        }
+        result = _build_proxy_kwargs(proxy_dict)
+        assert result == {"proxy": proxy_dict}
+
+
+class TestMaybeResolveGeoip:
+    @patch("cloakbrowser.geoip.resolve_proxy_geo", return_value=("America/New_York", "en-US"))
+    def test_geoip_with_string_proxy(self, mock_geo):
+        tz, locale = _maybe_resolve_geoip(True, "http://proxy:8080", None, None)
+        mock_geo.assert_called_once_with("http://proxy:8080")
+        assert tz == "America/New_York"
+        assert locale == "en-US"
+
+    @patch("cloakbrowser.geoip.resolve_proxy_geo", return_value=("Europe/London", "en-GB"))
+    def test_geoip_with_dict_proxy_extracts_server(self, mock_geo):
+        proxy_dict = {"server": "http://proxy:8080", "bypass": ".google.com"}
+        tz, locale = _maybe_resolve_geoip(True, proxy_dict, None, None)
+        mock_geo.assert_called_once_with("http://proxy:8080")
+        assert tz == "Europe/London"
+        assert locale == "en-GB"
+
+    def test_geoip_disabled_skips_resolution(self):
+        tz, locale = _maybe_resolve_geoip(False, "http://proxy:8080", None, None)
+        assert tz is None
+        assert locale is None
+
+    def test_geoip_no_proxy_skips_resolution(self):
+        tz, locale = _maybe_resolve_geoip(True, None, None, None)
+        assert tz is None
+        assert locale is None
+
+    @patch("cloakbrowser.geoip.resolve_proxy_geo", return_value=("Asia/Tokyo", "ja-JP"))
+    def test_geoip_preserves_explicit_timezone(self, mock_geo):
+        tz, locale = _maybe_resolve_geoip(True, "http://proxy:8080", "Europe/Berlin", None)
+        assert tz == "Europe/Berlin"
+        assert locale == "ja-JP"
+
+    @patch("cloakbrowser.geoip.resolve_proxy_geo", return_value=("America/New_York", "en-US"))
+    def test_geoip_normalizes_bare_proxy_with_creds(self, mock_geo):
+        # "user:pass@host:port" must be normalized to http:// before geoip lookup.
+        tz, locale = _maybe_resolve_geoip(True, "user:pass@proxy:8080", None, None)
+        mock_geo.assert_called_once_with("http://user:pass@proxy:8080")
+        assert tz == "America/New_York"
+        assert locale == "en-US"
+
+    @patch("cloakbrowser.geoip.resolve_proxy_geo", return_value=("America/New_York", "en-US"))
+    def test_geoip_normalizes_schemeless_proxy_no_creds(self, mock_geo):
+        # "host:port" (no @ and no scheme) must also be normalized.
+        tz, locale = _maybe_resolve_geoip(True, "proxy:8080", None, None)
+        mock_geo.assert_called_once_with("http://proxy:8080")
+        assert tz == "America/New_York"
+
+
+class TestBareProxyFormat:
+    """_parse_proxy_url must handle bare 'user:pass@host:port' strings (no scheme)."""
+
+    def test_bare_with_credentials(self):
+        r = _parse_proxy_url("user:pass@proxy:8080")
+        assert r["username"] == "user"
+        assert r["password"] == "pass"
+        assert r["server"] == "http://proxy:8080"
+
+    def test_bare_credentials_not_in_server(self):
+        r = _parse_proxy_url("user:pass@proxy1.example.com:5610")
+        assert "user" not in r["server"]
+        assert "pass" not in r["server"]
+
+    def test_bare_username_only(self):
+        r = _parse_proxy_url("user@proxy:8080")
+        assert r["username"] == "user"
+        assert "password" not in r
+        assert r["server"] == "http://proxy:8080"
+
+    def test_bare_no_port(self):
+        r = _parse_proxy_url("user:pass@proxy.example.com")
+        assert r["username"] == "user"
+        assert r["password"] == "pass"
+        assert r["server"] == "http://proxy.example.com"
+
+    def test_bare_no_credentials_passthrough(self):
+        # "host:port" without @ — no scheme, no creds — pass through unchanged
+        r = _parse_proxy_url("proxy:8080")
+        assert r == {"server": "proxy:8080"}
+
+    def test_build_proxy_kwargs_bare(self):
+        r = _build_proxy_kwargs("user:pass@proxy:8080")
+        assert r["proxy"]["username"] == "user"
+        assert r["proxy"]["password"] == "pass"
+        assert "user" not in r["proxy"]["server"]

tests/test_stealth.py

@@ -4,14 +4,19 @@ These tests verify that the stealth Chromium binary passes common
 bot detection checks. They require network access.
 """
 
+import os
+import time
+
 import pytest
 from cloakbrowser import launch
 
+PROXY = os.environ.get("CLOAKBROWSER_TEST_PROXY")
+
 
 @pytest.fixture(scope="module")
 def browser():
     """Shared browser instance for stealth tests."""
-    b = launch(headless=True)
+    b = launch(headless=True, proxy=PROXY)
     yield b
     b.close()
 
@@ -48,7 +53,7 @@ class TestWebDriverDetection:
         """Must have browser plugins (real Chrome has 5)."""
         page.goto("https://example.com")
         count = page.evaluate("navigator.plugins.length")
-        assert count >= 1, f"Expected plugins, got {count}"
+        assert count >= 5, f"Expected 5+ plugins (real Chrome), got {count}"
 
     def test_languages_present(self, page):
         """navigator.languages must be populated."""
@@ -81,28 +86,201 @@ class TestBotDetectionSites:
     Mark with pytest -m slow to skip in CI.
     """
 
+    @pytest.mark.slow
+    def test_bot_sannysoft(self, page):
+        """bot.sannysoft.com — all checks should pass (0 failures)."""
+        page.goto("https://bot.sannysoft.com", wait_until="networkidle", timeout=30000)
+        time.sleep(3)
+
+        results = page.evaluate("""() => {
+            const rows = document.querySelectorAll('table tr');
+            const failed = [];
+            let total = 0;
+            rows.forEach(r => {
+                const cells = r.querySelectorAll('td');
+                if (cells.length >= 2) {
+                    total++;
+                    const cls = cells[1].className || '';
+                    if (cls.includes('failed')) {
+                        failed.push(cells[0].innerText.trim());
+                    }
+                }
+            });
+            return {total, failed};
+        }""")
+
+        failed = results["failed"]
+        assert len(failed) == 0, f"Sannysoft failures: {', '.join(failed)}"
+
     @pytest.mark.slow
     def test_bot_incolumitas(self, page):
-        """bot.incolumitas.com should detect minimal flags."""
-        page.goto("https://bot.incolumitas.com", timeout=30000)
-        page.wait_for_timeout(5000)
-        # Check that we're not immediately flagged
-        title = page.title()
-        assert title  # Page loaded successfully
+        """bot.incolumitas.com — max 1 failure (WEBDRIVER false positive expected)."""
+        page.goto("https://bot.incolumitas.com", wait_until="networkidle", timeout=30000)
+        time.sleep(12)
+
+        # Known acceptable failures (not browser fingerprint issues):
+        # - WEBDRIVER: spec-level false positive across all builds
+        # - connectionRTT: detects datacenter/proxy network latency, not browser
+        KNOWN_ACCEPTABLE = {"WEBDRIVER", "connectionRTT"}
+
+        results = page.evaluate("""() => {
+            const text = document.body.innerText;
+            const okMatches = text.match(/"\\w+":\\s*"OK"/g) || [];
+            const failMatches = text.match(/"\\w+":\\s*"FAIL"/g) || [];
+            const failedTests = failMatches.map(m => m.match(/"(\\w+)"/)[1]);
+            return {passed: okMatches.length, failed: failMatches.length, failedTests};
+        }""")
+
+        failed_names = results["failedTests"]
+        real_failures = [f for f in failed_names if f not in KNOWN_ACCEPTABLE]
+        assert len(real_failures) == 0, f"Incolumitas unexpected failures: {', '.join(real_failures)}"
 
     @pytest.mark.slow
     def test_browserscan(self, page):
-        """BrowserScan bot detection should show NORMAL."""
-        page.goto("https://www.browserscan.net/bot-detection", timeout=30000)
-        page.wait_for_timeout(5000)
-        title = page.title()
-        assert title  # Page loaded
+        """BrowserScan bot detection — 0 abnormal checks."""
+        page.goto("https://www.browserscan.net/bot-detection", wait_until="networkidle", timeout=30000)
+        time.sleep(5)
+
+        results = page.evaluate("""() => {
+            const text = document.body.innerText;
+            const normalMatches = text.match(/Normal/g);
+            const abnormalMatches = text.match(/Abnormal/g);
+            return {
+                normal: normalMatches ? normalMatches.length : 0,
+                abnormal: abnormalMatches ? abnormalMatches.length : 0
+            };
+        }""")
+
+        assert results["abnormal"] == 0, \
+            f"BrowserScan: {results['abnormal']} abnormal, {results['normal']} normal"
 
     @pytest.mark.slow
     def test_device_and_browser_info(self, page):
-        """deviceandbrowserinfo.com should report isBot: false."""
-        page.goto("https://deviceandbrowserinfo.com/are_you_a_bot", timeout=30000)
-        page.wait_for_timeout(5000)
-        content = page.content()
-        # The page shows bot detection results
-        assert "deviceandbrowserinfo" in page.url.lower()
+        """deviceandbrowserinfo.com — isBot must be false."""
+        page.goto("https://deviceandbrowserinfo.com/are_you_a_bot", wait_until="domcontentloaded", timeout=30000)
+        time.sleep(8)
+
+        results = page.evaluate("""() => {
+            const text = document.body.innerText;
+            const botMatch = text.match(/"isBot":\\s*(true|false)/);
+            const isBot = botMatch ? botMatch[1] === 'true' : null;
+            const checks = {};
+            ['isBot', 'hasBotUserAgent', 'hasWebdriverTrue', 'isHeadlessChrome',
+             'isAutomatedWithCDP', 'hasSuspiciousWeakSignals', 'isPlaywright',
+             'hasInconsistentChromeObject'].forEach(p => {
+                const match = text.match(new RegExp('"' + p + '":\\s*(true|false)'));
+                if (match) checks[p] = match[1] === 'true';
+            });
+            return {isBot, checks};
+        }""")
+
+        assert results["isBot"] is False, f"Detected as bot! Checks: {results['checks']}"
+
+    @pytest.mark.slow
+    def test_fingerprintjs(self, page):
+        """FingerprintJS — must not be blocked, should see flight data."""
+        page.goto("https://demo.fingerprint.com/web-scraping", wait_until="domcontentloaded", timeout=30000)
+        time.sleep(8)
+
+        try:
+            page.click("button:has-text('Search')", timeout=5000)
+            time.sleep(5)
+        except Exception:
+            pass
+
+        results = page.evaluate("""() => {
+            const text = document.body.innerText;
+            const hasFlights = text.includes('Price per adult') || text.includes('$');
+            const isBlocked = text.includes('request was blocked') || text.includes('bot visit detected');
+            return {passed: hasFlights && !isBlocked, isBlocked, hasFlights};
+        }""")
+
+        assert not results["isBlocked"], "FingerprintJS blocked us as a bot"
+        assert results["passed"], "FingerprintJS: no flight data shown"
+
+    @pytest.mark.slow
+    def test_recaptcha_v3(self, page):
+        """reCAPTCHA v3 — score must be >= 0.7."""
+        page.goto(
+            "https://recaptcha-demo.appspot.com/recaptcha-v3-request-scores.php",
+            wait_until="domcontentloaded",
+            timeout=60000,
+        )
+        time.sleep(8)
+
+        results = page.evaluate("""() => {
+            const text = document.body.innerText;
+            const scoreMatch = text.match(/"score":\\s*(\\d+\\.\\d+)/);
+            return {score: scoreMatch ? parseFloat(scoreMatch[1]) : null};
+        }""")
+
+        score = results["score"]
+        assert score is not None, "Could not extract reCAPTCHA score"
+        assert score >= 0.7, f"reCAPTCHA score too low: {score}"
+
+
+class TestIssueRegressions:
+    """Regression tests for specific GitHub issues.
+
+    Uses the shared browser fixture to avoid "Sync API inside asyncio loop"
+    errors when pytest-asyncio is active.
+    """
+
+    @pytest.mark.slow
+    def test_immediate_goto_works(self, browser):
+        """Issue #9: page.goto() immediately after launch must not fail.
+
+        User reported reCAPTCHA fails if goto is called too quickly after
+        launch. This test verifies that immediate navigation works without
+        needing an artificial delay.
+        """
+        page = browser.new_page()
+        # No delay — goto immediately
+        page.goto("https://example.com", timeout=30000)
+        title = page.title()
+        page.close()
+        assert "Example Domain" in title, f"Immediate goto failed, title={title}"
+
+    @pytest.mark.slow
+    def test_add_init_script_without_proxy(self, browser):
+        """Issue #27: add_init_script must work (baseline without proxy).
+
+        The bug is proxy + add_init_script, but we first verify init_script
+        alone works so we have a baseline.
+        """
+        page = browser.new_page()
+        page.add_init_script("window.__cloaktest = 42;")
+        page.goto("https://example.com", timeout=30000)
+        val = page.evaluate("window.__cloaktest")
+        page.close()
+        assert val == 42, f"add_init_script failed, got {val}"
+
+    @pytest.mark.slow
+    def test_add_init_script_with_proxy(self, browser):
+        """Issue #27: add_init_script + proxy must not cause ERR_TUNNEL_CONNECTION_FAILED.
+
+        Patchright bug: add_init_script breaks proxy auth. This test guards
+        against regression if/when the upstream fix lands. Uses context-level
+        proxy to avoid launching a separate browser (event loop conflict).
+        """
+        proxy = os.environ.get("CLOAKBROWSER_TEST_PROXY")
+        if not proxy:
+            pytest.skip("CLOAKBROWSER_TEST_PROXY not set")
+
+        ctx = browser.new_context(proxy={"server": proxy})
+        page = ctx.new_page()
+        page.add_init_script("window.__cloaktest = 99;")
+        try:
+            page.goto("https://httpbin.org/ip", timeout=30000)
+            body = page.evaluate("document.body.innerText")
+            val = page.evaluate("window.__cloaktest")
+            assert val == 99, f"init_script value wrong: {val}"
+            assert "origin" in body, f"Page didn't load through proxy: {body[:100]}"
+        except Exception as e:
+            err = str(e)
+            if "ERR_TUNNEL_CONNECTION_FAILED" in err:
+                pytest.xfail("Known patchright bug: add_init_script + proxy auth (issue #27)")
+            raise
+        finally:
+            page.close()
+            ctx.close()

tests/test_update.py

@@ -0,0 +1,550 @@
+"""Tests for auto-update and version management."""
+
+from __future__ import annotations
+
+import hashlib
+import os
+from pathlib import Path
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from cloakbrowser.config import (
+    CHROMIUM_VERSION,
+    _version_newer,
+    _version_tuple,
+    get_chromium_version,
+    get_download_url,
+    get_effective_version,
+    get_platform_tag,
+)
+from cloakbrowser.download import (
+    _check_wrapper_update,
+    _download_and_extract,
+    _fetch_checksums,
+    _get_latest_chromium_version,
+    _parse_checksums,
+    _should_check_for_update,
+    _verify_checksum,
+    _write_version_marker,
+    check_for_update,
+    clear_cache,
+    ensure_binary,
+)
+
+
+class TestVersionComparison:
+    def test_version_tuple_parsing(self):
+        assert _version_tuple("145.0.7718.0") == (145, 0, 7718, 0)
+        assert _version_tuple("142.0.7444.175") == (142, 0, 7444, 175)
+
+    def test_newer_version(self):
+        assert _version_newer("145.0.7718.0", "142.0.7444.175") is True
+
+    def test_older_version(self):
+        assert _version_newer("142.0.7444.175", "145.0.7718.0") is False
+
+    def test_same_version(self):
+        assert _version_newer("142.0.7444.175", "142.0.7444.175") is False
+
+    def test_patch_bump(self):
+        assert _version_newer("142.0.7444.176", "142.0.7444.175") is True
+
+    def test_major_bump(self):
+        assert _version_newer("143.0.0.0", "142.9.9999.999") is True
+
+    def test_5th_segment_parsing(self):
+        assert _version_tuple("145.0.7632.109.2") == (145, 0, 7632, 109, 2)
+
+    def test_build_bump(self):
+        assert _version_newer("145.0.7632.109.3", "145.0.7632.109.2") is True
+
+    def test_build_suffix_newer_than_no_suffix(self):
+        assert _version_newer("145.0.7632.109.2", "145.0.7632.109") is True
+
+    def test_no_suffix_older_than_build_suffix(self):
+        assert _version_newer("145.0.7632.109", "145.0.7632.109.2") is False
+
+    def test_new_chromium_beats_old_build(self):
+        assert _version_newer("146.0.0.0", "145.0.7632.109.2") is True
+
+
+class TestDownloadUrl:
+    def test_default_url_format(self):
+        url = get_download_url()
+        assert "cloakbrowser.dev" in url
+        assert f"chromium-v{get_chromium_version()}" in url
+        assert url.endswith(".tar.gz")
+
+    def test_custom_version_url(self):
+        url = get_download_url("145.0.7718.0")
+        assert "chromium-v145.0.7718.0" in url
+
+    def test_no_old_repo_reference(self):
+        url = get_download_url()
+        assert "chromium-stealth-builds" not in url
+
+
+class TestShouldCheckForUpdate:
+    def test_disabled_by_env(self):
+        with patch.dict(os.environ, {"CLOAKBROWSER_AUTO_UPDATE": "false"}):
+            assert _should_check_for_update() is False
+
+    def test_disabled_by_env_case_insensitive(self):
+        with patch.dict(os.environ, {"CLOAKBROWSER_AUTO_UPDATE": "False"}):
+            assert _should_check_for_update() is False
+
+    def test_disabled_by_binary_override(self):
+        with patch.dict(os.environ, {"CLOAKBROWSER_BINARY_PATH": "/some/path"}):
+            assert _should_check_for_update() is False
+
+    def test_disabled_by_custom_download_url(self):
+        with patch.dict(
+            os.environ, {"CLOAKBROWSER_DOWNLOAD_URL": "https://my-mirror.com"}
+        ):
+            assert _should_check_for_update() is False
+
+    def test_rate_limited(self, tmp_path):
+        import time
+
+        with patch.dict(
+            os.environ,
+            {
+                "CLOAKBROWSER_CACHE_DIR": str(tmp_path),
+                "CLOAKBROWSER_BINARY_PATH": "",
+                "CLOAKBROWSER_AUTO_UPDATE": "",
+                "CLOAKBROWSER_DOWNLOAD_URL": "",
+            },
+        ):
+            check_file = tmp_path / ".last_update_check"
+            check_file.write_text(str(time.time()))
+            assert _should_check_for_update() is False
+
+    def test_stale_rate_limit_allows_check(self, tmp_path):
+        import time
+
+        with patch.dict(
+            os.environ,
+            {
+                "CLOAKBROWSER_CACHE_DIR": str(tmp_path),
+                "CLOAKBROWSER_BINARY_PATH": "",
+                "CLOAKBROWSER_AUTO_UPDATE": "",
+                "CLOAKBROWSER_DOWNLOAD_URL": "",
+            },
+        ):
+            check_file = tmp_path / ".last_update_check"
+            check_file.write_text(str(time.time() - 7200))  # 2 hours ago
+            assert _should_check_for_update() is True
+
+
+class TestEffectiveVersion:
+    def test_no_marker_returns_platform_version(self, tmp_path):
+        with patch.dict(os.environ, {"CLOAKBROWSER_CACHE_DIR": str(tmp_path)}):
+            assert get_effective_version() == get_chromium_version()
+
+    def test_marker_with_newer_version(self, tmp_path):
+        with patch.dict(os.environ, {"CLOAKBROWSER_CACHE_DIR": str(tmp_path)}):
+            marker = tmp_path / f"latest_version_{get_platform_tag()}"
+            marker.write_text("999.0.0.0")
+            # Binary doesn't exist, so should fall back
+            assert get_effective_version() == get_chromium_version()
+
+    def test_marker_with_older_version_ignored(self, tmp_path):
+        with patch.dict(os.environ, {"CLOAKBROWSER_CACHE_DIR": str(tmp_path)}):
+            marker = tmp_path / f"latest_version_{get_platform_tag()}"
+            marker.write_text("100.0.0.0")
+            assert get_effective_version() == get_chromium_version()
+
+
+class TestGetLatestVersion:
+    """Tests for _get_latest_chromium_version with platform-aware asset checking."""
+
+    def _make_assets(self, platforms: list[str]) -> list[dict]:
+        """Helper to build asset list from platform tags."""
+        return [{"name": f"cloakbrowser-{p}.tar.gz"} for p in platforms]
+
+    def _platform_tarball(self) -> str:
+        return f"cloakbrowser-{get_platform_tag()}.tar.gz"
+
+    def test_parses_chromium_tag_with_platform_asset(self):
+        mock_response = MagicMock()
+        mock_response.json.return_value = [
+            {
+                "tag_name": "chromium-v145.0.7718.0",
+                "draft": False,
+                "assets": self._make_assets(["linux-x64", "darwin-arm64", "darwin-x64", "windows-x64"]),
+            },
+        ]
+        mock_response.raise_for_status = MagicMock()
+
+        with patch("cloakbrowser.download.httpx.get", return_value=mock_response):
+            result = _get_latest_chromium_version()
+            assert result == "145.0.7718.0"
+
+    def test_skips_release_without_platform_asset(self):
+        """If latest release has no asset for our platform, fall back to older release."""
+        mock_response = MagicMock()
+        mock_response.json.return_value = [
+            {
+                "tag_name": "chromium-v145.0.7718.0",
+                "draft": False,
+                "assets": self._make_assets(["linux-x64"]),  # Linux only
+            },
+            {
+                "tag_name": "chromium-v142.0.7444.175",
+                "draft": False,
+                "assets": self._make_assets(["linux-x64", "darwin-arm64", "darwin-x64", "windows-x64"]),
+            },
+        ]
+        mock_response.raise_for_status = MagicMock()
+
+        with patch("cloakbrowser.download.httpx.get", return_value=mock_response):
+            result = _get_latest_chromium_version()
+            tag = get_platform_tag()
+            if tag == "linux-x64":
+                assert result == "145.0.7718.0"
+            else:
+                assert result == "142.0.7444.175"
+
+    def test_skips_draft_releases(self):
+        mock_response = MagicMock()
+        all_platforms = ["linux-x64", "darwin-arm64", "darwin-x64", "windows-x64"]
+        mock_response.json.return_value = [
+            {"tag_name": "chromium-v999.0.0.0", "draft": True, "assets": self._make_assets(all_platforms)},
+            {"tag_name": "chromium-v145.0.7718.0", "draft": False, "assets": self._make_assets(all_platforms)},
+        ]
+        mock_response.raise_for_status = MagicMock()
+
+        with patch("cloakbrowser.download.httpx.get", return_value=mock_response):
+            result = _get_latest_chromium_version()
+            assert result == "145.0.7718.0"
+
+    def test_skips_non_chromium_tags(self):
+        mock_response = MagicMock()
+        all_platforms = ["linux-x64", "darwin-arm64", "darwin-x64", "windows-x64"]
+        mock_response.json.return_value = [
+            {"tag_name": "v0.2.0", "draft": False, "assets": self._make_assets(all_platforms)},
+            {"tag_name": "chromium-v145.0.7718.0", "draft": False, "assets": self._make_assets(all_platforms)},
+        ]
+        mock_response.raise_for_status = MagicMock()
+
+        with patch("cloakbrowser.download.httpx.get", return_value=mock_response):
+            result = _get_latest_chromium_version()
+            assert result == "145.0.7718.0"
+
+    def test_returns_none_when_no_platform_assets(self):
+        """If no release has our platform, return None."""
+        mock_response = MagicMock()
+        mock_response.json.return_value = [
+            {
+                "tag_name": "chromium-v145.0.7718.0",
+                "draft": False,
+                "assets": [{"name": "cloakbrowser-freebsd-x64.tar.gz"}],
+            },
+        ]
+        mock_response.raise_for_status = MagicMock()
+
+        with patch("cloakbrowser.download.httpx.get", return_value=mock_response):
+            result = _get_latest_chromium_version()
+            assert result is None
+
+    def test_network_error_returns_none(self):
+        with patch("cloakbrowser.download.httpx.get", side_effect=Exception("timeout")):
+            result = _get_latest_chromium_version()
+            assert result is None
+
+
+class TestWrapperUpdateCheck:
+    """Tests for _check_wrapper_update (PyPI version check)."""
+
+    def setup_method(self):
+        import cloakbrowser.download as dl
+        dl._wrapper_update_checked = False
+
+    def test_warns_when_newer_version_available(self, caplog):
+        mock_resp = MagicMock()
+        mock_resp.json.return_value = {"info": {"version": "99.0.0"}}
+        mock_resp.raise_for_status = MagicMock()
+
+        with patch("cloakbrowser.download.httpx.get", return_value=mock_resp):
+            import logging
+            with caplog.at_level(logging.WARNING):
+                _check_wrapper_update()
+            assert "Update available" in caplog.text
+            assert "99.0.0" in caplog.text
+
+    def test_silent_when_current(self, caplog):
+        import cloakbrowser.download as dl
+        mock_resp = MagicMock()
+        mock_resp.json.return_value = {"info": {"version": dl._wrapper_version}}
+        mock_resp.raise_for_status = MagicMock()
+
+        with patch("cloakbrowser.download.httpx.get", return_value=mock_resp):
+            import logging
+            with caplog.at_level(logging.WARNING):
+                _check_wrapper_update()
+            assert "Update available" not in caplog.text
+
+    def test_disabled_by_auto_update_env(self):
+        with patch.dict(os.environ, {"CLOAKBROWSER_AUTO_UPDATE": "false"}):
+            with patch("cloakbrowser.download.httpx.get") as mock_get:
+                _check_wrapper_update()
+                mock_get.assert_not_called()
+
+    def test_disabled_by_custom_download_url(self):
+        with patch.dict(os.environ, {"CLOAKBROWSER_DOWNLOAD_URL": "https://mirror.example.com"}):
+            with patch("cloakbrowser.download.httpx.get") as mock_get:
+                _check_wrapper_update()
+                mock_get.assert_not_called()
+
+    def test_network_error_silent(self, caplog):
+        with patch("cloakbrowser.download.httpx.get", side_effect=Exception("timeout")):
+            import logging
+            with caplog.at_level(logging.WARNING):
+                _check_wrapper_update()
+            assert "Update available" not in caplog.text
+
+    def test_runs_only_once(self):
+        mock_resp = MagicMock()
+        mock_resp.json.return_value = {"info": {"version": "0.0.1"}}
+        mock_resp.raise_for_status = MagicMock()
+
+        with patch("cloakbrowser.download.httpx.get", return_value=mock_resp) as mock_get:
+            _check_wrapper_update()
+            _check_wrapper_update()
+            assert mock_get.call_count == 1
+
+
+class TestParseChecksums:
+    HASH_A = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+    HASH_B = "a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4e5f6a1b2"
+
+    def test_standard_format(self):
+        text = (
+            f"{self.HASH_A}  cloakbrowser-linux-x64.tar.gz\n"
+            f"{self.HASH_B}  cloakbrowser-darwin-arm64.tar.gz\n"
+        )
+        result = _parse_checksums(text)
+        assert result["cloakbrowser-linux-x64.tar.gz"] == self.HASH_A
+        assert result["cloakbrowser-darwin-arm64.tar.gz"] == self.HASH_B
+
+    def test_binary_mode_asterisk(self):
+        text = f"{self.HASH_A} *cloakbrowser-linux-x64.tar.gz\n"
+        result = _parse_checksums(text)
+        assert "cloakbrowser-linux-x64.tar.gz" in result
+
+    def test_empty_lines_skipped(self):
+        text = f"\n\n{self.HASH_A}  file.tar.gz\n\n"
+        result = _parse_checksums(text)
+        assert len(result) == 1
+
+    def test_uppercase_lowered(self):
+        text = f"{self.HASH_A.upper()}  file.tar.gz\n"
+        result = _parse_checksums(text)
+        assert result["file.tar.gz"] == self.HASH_A
+
+    def test_empty_input(self):
+        assert _parse_checksums("") == {}
+        assert _parse_checksums("   \n  \n") == {}
+
+
+class TestVerifyChecksum:
+    def test_matching_checksum(self, tmp_path):
+        content = b"test binary content"
+        file = tmp_path / "test.tar.gz"
+        file.write_bytes(content)
+        expected = hashlib.sha256(content).hexdigest()
+        # Should not raise
+        _verify_checksum(file, expected)
+
+    def test_mismatched_checksum(self, tmp_path):
+        file = tmp_path / "test.tar.gz"
+        file.write_bytes(b"real content")
+        with pytest.raises(RuntimeError, match="Checksum verification failed"):
+            _verify_checksum(file, "0" * 64)
+
+
+class TestClearCache:
+    def test_removes_dir(self, tmp_path):
+        with patch.dict(os.environ, {"CLOAKBROWSER_CACHE_DIR": str(tmp_path)}):
+            # Create some content
+            (tmp_path / "chromium-145").mkdir()
+            (tmp_path / "chromium-145" / "chrome").write_bytes(b"binary")
+            clear_cache()
+            assert not tmp_path.exists()
+
+    def test_noop_if_missing(self, tmp_path):
+        nonexistent = tmp_path / "nonexistent"
+        with patch.dict(os.environ, {"CLOAKBROWSER_CACHE_DIR": str(nonexistent)}):
+            clear_cache()  # Should not raise
+
+
+class TestCheckForUpdate:
+    @patch("cloakbrowser.download._maybe_trigger_update_check")
+    def test_returns_none_when_current(self, _mock_update):
+        with patch("cloakbrowser.download._get_latest_chromium_version", return_value=None):
+            assert check_for_update() is None
+
+    @patch("cloakbrowser.download._maybe_trigger_update_check")
+    def test_returns_none_on_network_error(self, _mock_update):
+        with patch("cloakbrowser.download._get_latest_chromium_version", side_effect=Exception("timeout")):
+            # _get_latest_chromium_version catches exceptions internally, but
+            # check_for_update itself can also fail — test graceful None return
+            with patch("cloakbrowser.download._get_latest_chromium_version", return_value=None):
+                assert check_for_update() is None
+
+    @patch("cloakbrowser.download._maybe_trigger_update_check")
+    def test_returns_version_when_newer(self, _mock_update, tmp_path):
+        with patch.dict(os.environ, {"CLOAKBROWSER_CACHE_DIR": str(tmp_path)}):
+            with patch("cloakbrowser.download._get_latest_chromium_version", return_value="999.0.0.0"):
+                with patch("cloakbrowser.download._download_and_extract"):
+                    result = check_for_update()
+                    assert result == "999.0.0.0"
+
+    @patch("cloakbrowser.download._maybe_trigger_update_check")
+    def test_skips_download_if_already_cached(self, _mock_update, tmp_path):
+        with patch.dict(os.environ, {"CLOAKBROWSER_CACHE_DIR": str(tmp_path)}):
+            # Create the binary dir so it looks already downloaded
+            binary_dir = tmp_path / "chromium-999.0.0.0"
+            binary_dir.mkdir()
+            with patch("cloakbrowser.download._get_latest_chromium_version", return_value="999.0.0.0"):
+                with patch("cloakbrowser.download._download_and_extract") as mock_dl:
+                    result = check_for_update()
+                    assert result == "999.0.0.0"
+                    mock_dl.assert_not_called()
+
+
+class TestEnsureBinary:
+    @patch("cloakbrowser.download._maybe_trigger_update_check")
+    def test_local_override(self, _mock_update, tmp_path):
+        binary = tmp_path / "chrome"
+        binary.write_bytes(b"binary")
+        with patch.dict(os.environ, {"CLOAKBROWSER_BINARY_PATH": str(binary)}):
+            result = ensure_binary()
+            assert result == str(binary)
+
+    @patch("cloakbrowser.download._maybe_trigger_update_check")
+    def test_local_override_missing_file(self, _mock_update):
+        with patch.dict(os.environ, {"CLOAKBROWSER_BINARY_PATH": "/nonexistent/chrome"}):
+            with pytest.raises(FileNotFoundError, match="does not exist"):
+                ensure_binary()
+
+    @patch("cloakbrowser.download._maybe_trigger_update_check")
+    def test_cached_binary_found(self, _mock_update, tmp_path):
+        with patch.dict(os.environ, {
+            "CLOAKBROWSER_CACHE_DIR": str(tmp_path),
+            "CLOAKBROWSER_BINARY_PATH": "",
+        }):
+            # Create a fake cached binary
+            version = get_chromium_version()
+            with patch("cloakbrowser.download.get_binary_path") as mock_path:
+                fake_binary = tmp_path / "chrome"
+                fake_binary.write_bytes(b"binary")
+                fake_binary.chmod(0o755)
+                mock_path.return_value = fake_binary
+                with patch("cloakbrowser.download.check_platform_available"):
+                    result = ensure_binary()
+                    assert result == str(fake_binary)
+
+    @patch("cloakbrowser.download._maybe_trigger_update_check")
+    def test_downloads_when_missing(self, _mock_update, tmp_path):
+        with patch.dict(os.environ, {
+            "CLOAKBROWSER_CACHE_DIR": str(tmp_path),
+            "CLOAKBROWSER_BINARY_PATH": "",
+        }):
+            fake_binary = tmp_path / "chrome"
+            with patch("cloakbrowser.download.check_platform_available"):
+                with patch("cloakbrowser.download.get_binary_path") as mock_path:
+                    # effective == platform_version (no marker), so fallback block skipped.
+                    # Call 1: get_binary_path(effective) → nonexistent (triggers download)
+                    # Call 2: get_binary_path() → fake_binary (post-download verify)
+                    mock_path.side_effect = [
+                        tmp_path / "nonexistent",  # pre-download: not cached
+                        fake_binary,               # post-download: binary ready
+                    ]
+                    with patch("cloakbrowser.download._download_and_extract") as mock_dl:
+                        fake_binary.write_bytes(b"binary")
+                        result = ensure_binary()
+                        mock_dl.assert_called_once()
+                        assert result == str(fake_binary)
+
+
+class TestWriteVersionMarker:
+    def test_creates_file(self, tmp_path):
+        with patch.dict(os.environ, {"CLOAKBROWSER_CACHE_DIR": str(tmp_path)}):
+            _write_version_marker("999.0.0.0")
+            marker = tmp_path / f"latest_version_{get_platform_tag()}"
+            assert marker.exists()
+            assert marker.read_text() == "999.0.0.0"
+
+
+class TestDownloadFallback:
+    """Verify primary server (cloakbrowser.dev) → GitHub Releases fallback on HTTP errors."""
+
+    def test_binary_download_falls_back_on_http_error(self, tmp_path):
+        """HTTP error from primary triggers GitHub Releases fallback for binary download."""
+        with patch.dict(os.environ, {
+            "CLOAKBROWSER_CACHE_DIR": str(tmp_path),
+            "CLOAKBROWSER_DOWNLOAD_URL": "",
+            "CLOAKBROWSER_SKIP_CHECKSUM": "true",
+        }):
+            urls_called = []
+
+            def mock_download_file(url, dest):
+                urls_called.append(url)
+                if "cloakbrowser.dev" in url:
+                    raise Exception("HTTP 429 Too Many Requests")
+                # GitHub fallback succeeds
+                dest.write_bytes(b"fake")
+
+            with patch("cloakbrowser.download._download_file", side_effect=mock_download_file), \
+                 patch("cloakbrowser.download._extract_archive"), \
+                 patch("cloakbrowser.download._show_welcome"):
+                _download_and_extract()
+
+            assert len(urls_called) == 2
+            assert "cloakbrowser.dev" in urls_called[0]
+            assert "github.com" in urls_called[1]
+
+    def test_binary_download_no_fallback_with_custom_url(self, tmp_path):
+        """Custom CLOAKBROWSER_DOWNLOAD_URL disables GitHub fallback — error propagates."""
+        with patch.dict(os.environ, {
+            "CLOAKBROWSER_CACHE_DIR": str(tmp_path),
+            "CLOAKBROWSER_DOWNLOAD_URL": "https://my-mirror.com/releases",
+            "CLOAKBROWSER_SKIP_CHECKSUM": "true",
+        }):
+            with patch("cloakbrowser.download._download_file", side_effect=Exception("503")):
+                with pytest.raises(Exception, match="503"):
+                    _download_and_extract()
+
+    def test_checksum_fetch_falls_back_on_http_error(self):
+        """HTTP error from primary checksum URL triggers GitHub fallback."""
+        valid_checksums = (
+            "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+            "  cloakbrowser-linux-x64.tar.gz\n"
+        )
+
+        def mock_get(url, **kwargs):
+            resp = MagicMock()
+            if "cloakbrowser.dev" in url:
+                resp.raise_for_status.side_effect = Exception("HTTP 429")
+                return resp
+            # GitHub URL succeeds
+            resp.text = valid_checksums
+            resp.raise_for_status = MagicMock()
+            return resp
+
+        with patch.dict(os.environ, {"CLOAKBROWSER_DOWNLOAD_URL": ""}):
+            with patch("cloakbrowser.download.httpx.get", side_effect=mock_get):
+                result = _fetch_checksums()
+
+        assert result is not None
+        assert "cloakbrowser-linux-x64.tar.gz" in result
+
+    def test_checksum_fetch_returns_none_when_both_fail(self):
+        """Both primary and GitHub checksum URLs fail → returns None (skip verification)."""
+        with patch.dict(os.environ, {"CLOAKBROWSER_DOWNLOAD_URL": ""}):
+            with patch("cloakbrowser.download.httpx.get", side_effect=Exception("network error")):
+                result = _fetch_checksums()
+
+        assert result is None