release: v0.3.4 — 26 patches, auto-spoof, timezone fix, README refresh

refactor: simplify stealth args — rely on binary auto-generation (v14+)
Binary v14+ auto-generates hardware concurrency, device memory, screen dimensions, and window size from the fingerprint seed. Remove these explicit flags from Python/JS wrapper defaults and update README: - Remove 5 flags from get_default_stealth_args() in both wrappers - Move hardware-concurrency, device-memory, screen-width, screen-height to the Additional Flags table with auto-generated defaults documented - Update code examples to use --fingerprint instead of --window-size - Simplify fingerprint defaults table to show only wrapper-set flags
2026-06-23 11:41:46 +02:00 · 2026-03-04 01:11:50 +01:00 · 2026-03-03 21:27:01 +01:00 · 2026-03-03 20:05:16 +01:00 · 2026-03-03 08:57:07 +01:00 · 2026-03-03 08:57:07 +01:00
24 changed files with 1026 additions and 288 deletions
@@ -0,0 +1,95 @@
+# 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
+
+Listing CloakBrowser as a dependency in your project (e.g., in `requirements.txt`, `package.json`, or documentation) is not redistribution — end users download the Binary directly from official CloakHQ channels.
+
+Internal caching or mirroring (including via artifact repositories such as Artifactory or Nexus) of unmodified Binaries that were originally obtained from official CloakHQ distribution channels is permitted solely for internal operational purposes within your organization. This permission does not allow public redistribution or distribution to third parties.
+
+## 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 Restrictions 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.
+
+## 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.
+
+## 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.
@@ -6,9 +6,56 @@ Changes are tagged: **[wrapper]** for Python/JS wrapper, **[binary]** for Chromi

 ---

-## [0.3.0] — Unreleased
+## [0.3.4] — 2026-03-04

-Chromium v145 upgrade. 26 fingerprint patches (up from 16). New download verification and fallback system. Pending: macOS v145 binary builds.
+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

@@ -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
@@ -2,31 +2,46 @@
 <img src="https://i.imgur.com/cqkp6fG.png" width="500" alt="CloakBrowser">
 </p>

-# CloakBrowser
-
 <p align="center">
 <a href="https://pypi.org/project/cloakbrowser/"><img src="https://img.shields.io/pypi/v/cloakbrowser" alt="PyPI"></a>
 <a href="https://www.npmjs.com/package/cloakbrowser"><img src="https://img.shields.io/npm/v/cloakbrowser" alt="npm"></a>
-<a href="https://pypi.org/project/cloakbrowser/"><img src="https://img.shields.io/pypi/pyversions/cloakbrowser" alt="Python"></a>
 <a href="LICENSE"><img src="https://img.shields.io/github/license/CloakHQ/CloakBrowser" alt="License"></a>
+<a href="https://github.com/CloakHQ/CloakBrowser"><img src="https://img.shields.io/github/last-commit/CloakHQ/CloakBrowser" alt="Last Commit"></a>
 <br>
 <a href="https://github.com/CloakHQ/CloakBrowser"><img src="https://img.shields.io/github/stars/CloakHQ/CloakBrowser" alt="Stars"></a>
 <a href="https://pepy.tech/projects/cloakbrowser"><img src="https://img.shields.io/pepy/dt/cloakbrowser?label=pypi&logo=pypi&logoColor=white" alt="PyPI Downloads"></a>
 <a href="https://www.npmjs.com/package/cloakbrowser"><img src="https://img.shields.io/npm/dt/cloakbrowser?label=npm&logo=npm&logoColor=white" alt="npm Downloads"></a>
-<a href="https://github.com/CloakHQ/CloakBrowser"><img src="https://img.shields.io/github/last-commit/CloakHQ/CloakBrowser" alt="Last Commit"></a>
 </p>

-**Stealth Chromium that passes every bot detection test.**
+<br>

-Drop-in Playwright/Puppeteer replacement for Python and JavaScript. Same API, same code — just swap the import. Your browser now scores **0.9 on reCAPTCHA v3**, passes **Cloudflare Turnstile**, and clears **30 out of 30** stealth detection tests.
+<h3 align="center">Stealth Chromium that passes every bot detection test.</h3>
+
+<table><tr><td>
+Not a patched config. Not a JS injection. A real Chromium binary with fingerprints modified at the C++ source level. Antibot systems score it as a normal browser — because it <em>is</em> a normal browser.
+</td></tr></table>
+
+<br>
+
+<p align="center">
+<img src="https://i.imgur.com/IvB0It7.gif" width="600" alt="Cloudflare Turnstile — 3 Tests Passing">
+<br><em>Cloudflare Turnstile — 3 live tests passing (headed mode, macOS)</em>
+</p>
+
+<br>
+
+<p align="center">
+Drop-in Playwright/Puppeteer replacement for Python and JavaScript.<br>
+Same API, same code — just swap the import. <strong>3 lines of code, 30 seconds to unblock.</strong>
+</p>

 - 🔒 **26 source-level C++ patches** — not JS injection, not config flags
- 🛡️ **CDP stealth built-in** — powered by [Patchright](https://github.com/Kaliiiiiiiiii-Vinyzu/patchright), hides Playwright's automation signals
+- 🛡️ **CDP stealth built-in** — uses [Patchright](https://github.com/Kaliiiiiiiiii-Vinyzu/patchright) to reduce Playwright's automation footprint
 - 🎯 **0.9 reCAPTCHA v3 score** — human-level, server-verified
 - ☁️ **Passes Cloudflare Turnstile**, FingerprintJS, BrowserScan — 30/30 tests
 - 🔄 **Drop-in replacement** — works with Playwright (Python & JS) and Puppeteer (JS)
 - 📦 **`pip install cloakbrowser`** or **`npm install cloakbrowser`** — binary auto-downloads, zero config
- 🦊 **Fills the Camoufox vacuum** — Chromium-based, actively maintained
+- 💸 **Enterprise results, zero cost** — anti-detect browsers charge $49–299/month for the same results. CloakBrowser is free

 **Python:**
 ```python
@@ -48,15 +63,7 @@ await page.goto('https://protected-site.com');
 await browser.close();
 ```

-**JavaScript (Puppeteer):**
-```javascript
-import { launch } from 'cloakbrowser/puppeteer';
-
-const browser = await launch();
-const page = await browser.newPage();
-await page.goto('https://protected-site.com');
-await browser.close();
-```
+Also works with Puppeteer: `import { launch } from 'cloakbrowser/puppeteer'` ([details](#puppeteer))

 ## Install

@@ -76,14 +83,37 @@ npm install cloakbrowser puppeteer-core

 On first run, the stealth Chromium binary is automatically downloaded (~200MB, cached locally).

-## What's New in v0.3.0
+**Optional:** Auto-detect timezone/locale from proxy IP:
+```bash
+pip install cloakbrowser[geoip]
+```

- **Chromium 145** — latest stable, 26 fingerprint patches
- **10 new patches** — screen dimensions, audio, WebGL, and more
- **CDP hardening** — audited and patched known automation detection vectors
+**Migrating from Playwright?** One-line change:
+
+```diff
+- from playwright.sync_api import sync_playwright
+- pw = sync_playwright().start()
+- browser = pw.chromium.launch()
+ from cloakbrowser import launch
+ browser = launch()
+
+page = browser.new_page()
+page.goto("https://example.com")
+# ... rest of your code works unchanged
+```
+
+> ⭐ **Star** to show support — **[Watch releases](https://github.com/CloakHQ/CloakBrowser/subscription)** to get notified when new builds drop.
+
+## What's New in v0.3.4
+
+- **All 4 platforms** — Linux x64, macOS arm64, macOS x64, and Windows x64 all on Chromium 145
+- **26 fingerprint patches** — 10 new patches since v142 (screen, device memory, audio, WebGL, auto-spoof, and more)
+- **Stealthy with zero flags** — binary auto-generates a random fingerprint seed at startup. No configuration required
+- **Deterministic seeds** — `--fingerprint=seed` produces the same identity across launches for session persistence
+- **Full stealth audit** — every patch reviewed for detection vectors, multiple fixes shipped
 - **Timezone & locale from proxy IP** — `launch(proxy="...", geoip=True)` auto-detects timezone and locale
- **Improved cross-platform spoofing** — fixed edge cases in font rendering and GPU reporting
- **Automated test matrix** — 41+ tests across 8 groups (stealth, fingerprint, reCAPTCHA, Turnstile, TLS, enterprise) running in Docker
+- **SHA-256 checksum verification** — binary downloads are verified for integrity
+- **CDP hardening** — audited and patched known automation detection vectors

 See the full [CHANGELOG.md](CHANGELOG.md) for details.

@@ -91,19 +121,23 @@ See the full [CHANGELOG.md](CHANGELOG.md) for details.

 - **Config-level patches break** — `playwright-stealth`, `undetected-chromedriver`, and `puppeteer-extra` inject JavaScript or tweak flags. Every Chrome update breaks them. Antibot systems detect the patches themselves.
 - **CloakBrowser patches Chromium source code** — fingerprints are modified at the C++ level, compiled into the binary. Detection sites see a real browser because it *is* a real browser.
- **Two layers of stealth** — C++ patches handle fingerprints (GPU, screen, UA, hardware reporting), while the Patchright driver eliminates CDP automation leaks. Most stealth tools only do one or the other.
+- **Two layers of stealth** — C++ patches handle fingerprints (GPU, screen, UA, hardware reporting), while the Patchright driver defers Playwright's binding registration and randomizes internal world names. Most stealth tools only do one or the other.
+- **Same behavior everywhere** — works identically local, in Docker, and on VPS. No environment-specific patches or config needed.
+- **Works with AI browser agents** — drop-in stealth binary for [browser-use](https://github.com/browser-use/browser-use), [agent-browser](https://github.com/nichochar/agent-browser), Claude computer use, and OpenAI Operator
 - **One line to switch** — same Playwright API, no new abstractions, no CAPTCHA-solving services.

+CloakBrowser doesn't solve CAPTCHAs — it prevents them from appearing. Antibot systems score it as a normal browser because it *is* a normal browser, just with your fingerprints instead of theirs. No CAPTCHA services, no proxy rotation built in — bring your own proxies, use the Playwright API you already know.
+
 ## Test Results

-All tests verified against live detection services. Last tested: Feb 2026 (Chromium 145).
+All tests verified against live detection services. Last tested: Mar 2026 (Chromium 145).

 | Detection Service | Stock Playwright | CloakBrowser | Notes |
 |---|---|---|---|
 | **reCAPTCHA v3** | 0.1 (bot) | **0.9** (human) | Server-side verified |
 | **Cloudflare Turnstile** (non-interactive) | FAIL | **PASS** | Auto-resolve |
 | **Cloudflare Turnstile** (managed) | FAIL | **PASS** | Single click |
-| **ShieldSquare** (yad2.co.il) | BLOCKED | **PASS** | Production site |
+| **ShieldSquare** | BLOCKED | **PASS** | Production site |
 | **FingerprintJS** bot detection | DETECTED | **PASS** | demo.fingerprint.com |
 | **BrowserScan** bot detection | DETECTED | **NORMAL** (4/4) | browserscan.net |
 | **bot.incolumitas.com** | 13 fails | **1 fail** | WEBDRIVER spec only |
@@ -114,16 +148,10 @@ All tests verified against live detection services. Last tested: Feb 2026 (Chrom
 | UA string | `HeadlessChrome` | **`Chrome/145.0.0.0`** | No headless leak |
 | CDP detection | Detected | **Not detected** | `isAutomatedWithCDP: false` |
 | TLS fingerprint | Mismatch | **Identical to Chrome** | ja3n/ja4/akamai match |
-
-**30/30 tests passed.**
+| | | **30/30 passed** | |

 ### Proof

-<p align="center">
-<img src="https://i.imgur.com/IvB0It7.gif" width="600" alt="Cloudflare Turnstile — 3 Tests Passing (Headed Mode)">
-<br><em>Cloudflare Turnstile — 3 live tests passing in headed mode (macOS)</em>
-</p>
-
 <p align="center">
 <img src="https://i.imgur.com/hvIQyMv.png" width="600" alt="reCAPTCHA v3 — Score 0.9">
 <br><em>reCAPTCHA v3 score 0.9 — server-side verified (human-level)</em>
@@ -149,7 +177,7 @@ All tests verified against live detection services. Last tested: Feb 2026 (Chrom
 CloakBrowser is a thin wrapper (Python + JavaScript) around a custom-built Chromium binary:

 1. **You install** → `pip install cloakbrowser` or `npm install cloakbrowser`
-2. **First launch** → binary auto-downloads for your platform (Linux x64, macOS arm64/x64)
+2. **First launch** → binary auto-downloads for your platform (Chromium 145)
 3. **Every launch** → Playwright or Puppeteer starts with our binary + stealth args
 4. **You write code** → standard Playwright/Puppeteer API, nothing new to learn

@@ -157,6 +185,8 @@ The binary includes 26 source-level patches covering canvas, WebGL, audio, fonts

 These are compiled into the Chromium binary — not injected via JavaScript, not set via flags.

+Binary downloads are verified with SHA-256 checksums to ensure integrity.
+
 ## API

 ### `launch()`
@@ -174,7 +204,7 @@ browser = launch(headless=False)
 browser = launch(proxy="http://user:pass@proxy:8080")

 # With extra Chrome args
-browser = launch(args=["--disable-gpu", "--window-size=1920,1080"])
+browser = launch(args=["--disable-gpu"])

 # With timezone and locale (sets both binary flags and Playwright context)
 browser = launch(timezone="America/New_York", locale="en-US")
@@ -182,6 +212,9 @@ browser = launch(timezone="America/New_York", locale="en-US")
 # Auto-detect timezone/locale from proxy IP (requires: pip install cloakbrowser[geoip])
 browser = launch(proxy="http://proxy:8080", geoip=True)

+# Explicit timezone/locale always win over auto-detection
+browser = launch(proxy="http://proxy:8080", geoip=True, timezone="Europe/London")
+
 # Without default stealth args (bring your own fingerprint flags)
 browser = launch(stealth_args=False, args=["--fingerprint=12345"])
 ```
@@ -220,27 +253,6 @@ context = launch_context(
 page = context.new_page()
 ```

-### Auto Timezone/Locale from Proxy IP
-
-When using a proxy, antibot systems check that your browser's timezone and locale match the proxy's geographic location. CloakBrowser can auto-detect these from the proxy IP using an offline GeoIP database:
-
-```bash
-pip install cloakbrowser[geoip]   # installs geoip2 + downloads ~70 MB database on first use
-```
-
-```python
-# Timezone and locale auto-set from proxy's IP geolocation
-browser = launch(proxy="http://proxy:8080", geoip=True)
-
-# Works with launch_context too — sets both binary flags AND Playwright context
-context = launch_context(proxy="http://proxy:8080", geoip=True)
-
-# Explicit values always win over auto-detection
-browser = 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.
-
 ### Utility Functions

 ```python
@@ -248,7 +260,7 @@ from cloakbrowser import binary_info, clear_cache, ensure_binary

 # Check binary installation status
 print(binary_info())
-# {'version': '142.0.7444.175', 'platform': 'linux-x64', 'installed': True, ...}
+# {'version': '145.0.7632.109', 'platform': 'linux-x64', 'installed': True, ...}

 # Force re-download
 clear_cache()
@@ -273,7 +285,9 @@ const browser = await launch();
 const browser = await launch({
  headless: false,
  proxy: 'http://user:pass@proxy:8080',
-  args: ['--window-size=1920,1080'],
+  args: ['--fingerprint=12345'],
+  timezone: 'America/New_York',
+  locale: 'en-US',
 });

 // Convenience: browser + context in one call
@@ -288,6 +302,8 @@ const page = await context.newPage();

 > **Note:** Each example above is standalone — not meant to run as one block.

+All Python options work in JS: `stealthArgs: false` to disable defaults, `geoip: true` to auto-detect timezone/locale from proxy IP.
+
 ### Puppeteer

 > **Note:** The Playwright wrapper is recommended for sites with reCAPTCHA Enterprise. Puppeteer's CDP protocol leaks automation signals that reCAPTCHA Enterprise can detect, causing intermittent 403 errors. This is a known Puppeteer limitation, not specific to CloakBrowser. Use Playwright for best results.
@@ -324,10 +340,21 @@ clearCache();
 | `CLOAKBROWSER_CACHE_DIR` | `~/.cloakbrowser` | Binary cache directory |
 | `CLOAKBROWSER_DOWNLOAD_URL` | `cloakbrowser.dev` | Custom download URL for binary |
 | `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 |

 ## Fingerprint Management

-Every launch automatically generates a **unique fingerprint**. A random seed (10000–99999) drives all seed-based patches — canvas, WebGL, audio, fonts, and client rects all produce consistent, correlated values derived from that single seed.
+The binary is **stealthy by default** — no flags needed. It auto-generates a random fingerprint seed at startup and spoofs all detectable values (GPU, hardware specs, screen dimensions, canvas, WebGL, audio, fonts). Every launch produces a fresh, coherent identity.
+
+**How fingerprinting works:**
+
+| Scenario | What happens |
+|----------|-------------|
+| **No flags** | Random seed auto-generated at startup. GPU, screen, hardware specs, and all noise patches are spoofed automatically. Fresh identity each launch. |
+| **`--fingerprint=seed`** | Deterministic identity from the seed. Same seed = same fingerprint across launches. Use this for session persistence (returning visitor). |
+| **`--fingerprint=seed` + explicit flags** | Explicit flags override individual auto-generated values. The seed fills in everything else. |
+
+The binary detects its platform at compile time — a macOS binary reports as macOS with Apple GPU, a Linux binary reports as Linux with NVIDIA GPU. The **wrapper** overrides this on Linux by passing `--fingerprint-platform=windows`, so sessions appear as Windows desktops (more common fingerprint, harder to cluster). Use `--fingerprint-platform` for cross-platform spoofing when running the binary directly.

 > **Tip: Use a fixed seed when revisiting the same site.** A random seed makes every session look like a different device — which can be suspicious when hitting the same site repeatedly from the same IP. For reCAPTCHA v3 Enterprise and similar scoring systems, a fixed seed produces a consistent fingerprint across sessions, making you look like a returning visitor:
 > ```python
@@ -339,17 +366,20 @@ Every launch automatically generates a **unique fingerprint**. A random seed (10

 ### Default Fingerprint

-Every `launch()` call sets these automatically. Defaults are **platform-aware** — macOS runs as a native Mac browser, Linux spoofs Windows:
+Every `launch()` call sets these automatically. The **wrapper** applies platform-aware defaults — on Linux it spoofs as Windows for a more common fingerprint, on macOS it runs as a native Mac browser:

-| Flag | Linux Default | macOS Default | Controls |
+| Flag | Linux/Windows Default | macOS Default | Controls |
 |------|--------------|---------------|----------|
 | `--fingerprint` | Random (10000–99999) | Random (10000–99999) | Master seed for canvas, WebGL, audio, fonts, client rects |
 | `--fingerprint-platform` | `windows` | `macos` | `navigator.platform`, User-Agent OS, GPU pool selection |
-| `--fingerprint-hardware-concurrency` | `8` | *(not set — uses real value)* | `navigator.hardwareConcurrency` |
-| `--fingerprint-gpu-vendor` | `NVIDIA Corporation` | *(not set — native Apple GPU)* | WebGL `UNMASKED_VENDOR_WEBGL` |
-| `--fingerprint-gpu-renderer` | `NVIDIA GeForce RTX 3070` | *(not set — native Metal renderer)* | WebGL `UNMASKED_RENDERER_WEBGL` |
+| `--fingerprint-gpu-vendor` | `NVIDIA Corporation` | `Google Inc. (Apple)` | WebGL `UNMASKED_VENDOR_WEBGL` |
+| `--fingerprint-gpu-renderer` | `NVIDIA GeForce RTX 3070` | `ANGLE (Apple, ANGLE Metal Renderer: Apple M3, Unspecified Version)` | WebGL `UNMASKED_RENDERER_WEBGL` |

-> **Important:** `--fingerprint-platform` must always be set. The binary defaults to `windows` internally when this flag is missing, which causes GPU/UA mismatches on non-Windows systems. The wrapper handles this automatically.
+The binary auto-generates hardware concurrency (8), device memory (8), and screen dimensions (1920x1080 on Windows/Linux, 1440x900 on macOS) from the seed. Override with explicit flags if needed.
+
+> **Using the binary directly?** It works out of the box with zero flags — the binary auto-spoofs everything. Pass `--fingerprint=seed` for a persistent identity, or use explicit flags like `--fingerprint-gpu-renderer` to override any auto-generated value.
+
+> **Production tip:** For better stealth at scale, pass your own GPU, screen, and hardware values instead of relying on defaults. Custom parameters make your sessions harder to cluster by anti-bot systems that look for uniform fingerprint profiles.

 ### Additional Flags

@@ -357,20 +387,24 @@ Supported by the binary but **not set by default** — pass via `args` to custom

 | Flag | Controls |
 |------|----------|
+| `--fingerprint-hardware-concurrency` | `navigator.hardwareConcurrency` (auto-generated: `8`) |
+| `--fingerprint-device-memory` | `navigator.deviceMemory` in GB (auto-generated: `8`) |
+| `--fingerprint-screen-width` | Screen width (auto-generated: `1920` Win/Linux, `1440` macOS) |
+| `--fingerprint-screen-height` | Screen height (auto-generated: `1080` Win/Linux, `900` macOS) |
 | `--fingerprint-brand` | Browser brand: `Chrome`, `Edge`, `Opera`, `Vivaldi` |
 | `--fingerprint-brand-version` | Brand version (UA + Client Hints) |
 | `--fingerprint-platform-version` | Client Hints platform version |
 | `--fingerprint-location` | Geolocation coordinates |
-| `--timezone` | Timezone (e.g. `America/New_York`) |
+| `--fingerprint-timezone` | Timezone (e.g. `America/New_York`) |
+| `--fingerprint-taskbar-height` | Override taskbar height (binary defaults: Win=48, Mac=95, Linux=0) |
+| `--fingerprint-fonts-dir` | Path to cross-platform font directory |
+| `--enable-blink-features=FakeShadowRoot` | Access closed shadow DOM elements |

 > **Note:** All stealth tests were verified with the default fingerprint config above. Changing these flags may affect detection results — test your configuration before using in production.

 ### Examples

 ```python
-# Default — unique fingerprint every launch
-browser = launch()
-
 # Pin a seed for a persistent identity
 browser = launch(args=["--fingerprint=42069"])

@@ -378,17 +412,10 @@ browser = launch(args=["--fingerprint=42069"])
 browser = launch(stealth_args=False, args=[
    "--fingerprint=42069",
    "--fingerprint-platform=windows",
-    "--fingerprint-hardware-concurrency=8",
    "--fingerprint-gpu-vendor=NVIDIA Corporation",
    "--fingerprint-gpu-renderer=NVIDIA GeForce RTX 3070",
 ])

-# Add timezone and location on top of defaults
-browser = launch(args=[
-    "--timezone=America/New_York",
-    "--fingerprint-location=40.7128,-74.0060",
-])
-
 # Override GPU to look like a different machine
 browser = launch(args=[
    "--fingerprint-gpu-vendor=Intel Inc.",
@@ -396,30 +423,6 @@ browser = launch(args=[
 ])
 ```

-```javascript
-// JavaScript — same flags
-const browser = await launch({
-  args: ['--fingerprint=42069', '--timezone=Europe/London'],
-});
-```
-
-
-## Use With Existing Playwright Code
-
-If you have existing Playwright scripts, migration is one line:
-
-```diff
- from playwright.sync_api import sync_playwright
- pw = sync_playwright().start()
- browser = pw.chromium.launch()
-+ from cloakbrowser import launch
-+ browser = launch()
-
-page = browser.new_page()
-page.goto("https://example.com")
-# ... rest of your code works unchanged
-```
-
 ## Comparison

 | Feature | Playwright | playwright-stealth | undetected-chromedriver | Camoufox | CloakBrowser |
@@ -428,30 +431,30 @@ page.goto("https://example.com")
 | Cloudflare Turnstile | Fail | Sometimes | Sometimes | Pass | **Pass** |
 | Patch level | None | JS injection | Config patches | C++ (Firefox) | **C++ (Chromium)** |
 | Survives Chrome updates | N/A | Breaks often | Breaks often | Yes | **Yes** |
-| Maintained | Yes | Stale | Stale | Dead (2025) | **Active** |
+| Maintained | Yes | Stale | Stale | Unstable (2026 beta) | **Active** |
 | Browser engine | Chromium | Chromium | Chrome | Firefox | **Chromium** |
 | Playwright API | Native | Native | No (Selenium) | No | **Native** |

 ## Platforms

-| Platform | Status |
-|---|---|
-| Linux x86_64 | ✅ Available |
-| macOS arm64 (Apple Silicon) | ✅ Available |
-| macOS x86_64 (Intel) | ✅ Available |
-| Windows | Planned |
+| Platform | Chromium | Patches | Status |
+|---|---|---|---|
+| Linux x86_64 | 145 | 26 | ✅ Latest |
+| macOS arm64 (Apple Silicon) | 145 | 26 | ✅ Latest |
+| macOS x86_64 (Intel) | 145 | 26 | ✅ Latest |
+| Windows x86_64 | 145 | 26 | ✅ Latest |

-**macOS (early access):** macOS builds are new — tested but not yet battle-tested at scale like Linux. If you hit any issues, [please open a GitHub issue](https://github.com/CloakHQ/CloakBrowser/issues).
+The wrapper auto-downloads the correct binary for your platform.

 **macOS first launch:** The binary is ad-hoc signed. On first run, macOS Gatekeeper will block it. Right-click the app → **Open** → click **Open** in the dialog. This is only needed once.

-**On Windows?** You can still use CloakBrowser via Docker or with your own Chromium binary by setting `CLOAKBROWSER_BINARY_PATH=/path/to/chrome`.
 ## Examples

 **Python** — see [`examples/`](examples/):
 - [`basic.py`](examples/basic.py) — Launch and load a page
 - [`recaptcha_score.py`](examples/recaptcha_score.py) — Check your reCAPTCHA v3 score
 - [`stealth_test.py`](examples/stealth_test.py) — Run against all detection services
+- [`fingerprint_scan_test.py`](examples/fingerprint_scan_test.py) — Test against fingerprint-scan.com and CreepJS

 **JavaScript** — see [`js/examples/`](js/examples/):
 - [`basic-playwright.ts`](js/examples/basic-playwright.ts) — Playwright launch and load
@@ -462,16 +465,12 @@ page.goto("https://example.com")

 | Feature | Status |
 |---------|--------|
-| Linux x64 binary | ✅ Released |
-| macOS arm64 (Apple Silicon) | ✅ Released |
-| macOS x64 (Intel) | ✅ Released |
-| Chromium 145 build (26 patches) | 🔧 In progress |
+| Linux x64 — Chromium 145 (26 patches) | ✅ Released |
+| macOS arm64/x64 — Chromium 145 (26 patches) | ✅ Released |
+| Windows x64 — Chromium 145 (26 patches) | ✅ Released |
 | JavaScript/Puppeteer + Playwright support | ✅ Released |
 | Fingerprint rotation per session | ✅ Released |
 | Built-in proxy rotation | 📋 Planned |
-| Windows support | 📋 Planned |
-
-> ⭐ **Star this repo** to get notified when new builds drop.

 ## Docker

@@ -495,6 +494,21 @@ COPY your_script.py /app/
 CMD ["python", "your_script.py"]
 ```

+**With a proxy** (the most common production setup):
+
+```bash
+docker run --rm cloakbrowser python -c "
+from cloakbrowser import launch
+browser = launch(proxy='http://user:pass@proxy:8080')
+page = browser.new_page()
+page.goto('https://example.com')
+print(page.title())
+browser.close()
+"
+```
+
+CloakBrowser works identically local, in Docker, and on VPS. No environment-specific config needed.
+
 **Note:** If you run CloakBrowser inside a web server with uvloop (e.g., `uvicorn[standard]`), use `--loop asyncio` to avoid subprocess pipe hangs.

 ## Headed Mode (for aggressive bot detection)
@@ -540,6 +554,13 @@ const browser = await launch({ args: ['--disable-http2'] });

 Only use this flag for sites that require it — most sites work fine with HTTP/2.

+**Something not working? Make sure you're on the latest wrapper**
+Older versions may use outdated stealth args or download an older binary:
+```bash
+pip install -U cloakbrowser    # Python
+npm install cloakbrowser@latest # JavaScript
+```
+
 **Binary download fails / timeout**
 Set a custom download URL or use a local binary:
 ```bash
@@ -584,7 +605,7 @@ Other tips for maximizing reCAPTCHA scores:
 - **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 a fixed fingerprint seed** for consistent device identity across sessions (see [Fingerprint Management](#fingerprint-management))
 - **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:
  ```python
  page.type("#email", "user@example.com", delay=50)
@@ -597,7 +618,7 @@ Other tips for maximizing reCAPTCHA scores:
 A: CloakBrowser is a browser. Using it is legal. What you do with it is your responsibility, just like with Chrome, Firefox, or any browser. We do not endorse violating website terms of service.

 **Q: How is this different from Camoufox?**
-A: Camoufox patched Firefox. We patch Chromium. Chromium means native Playwright support, larger ecosystem, and TLS fingerprints that match real Chrome. Also, Camoufox is no longer maintained (since March 2025).
+A: Camoufox patches Firefox. We patch Chromium. Chromium means native Playwright support, larger ecosystem, and TLS fingerprints that match real Chrome. Camoufox returned in early 2026 but is in unstable beta — CloakBrowser is production-ready.

 **Q: Will detection sites eventually catch this?**
 A: Possibly. Bot detection is an arms race. Source-level patches are harder to detect than config-level patches, but not impossible. We actively monitor and update when detection evolves.
@@ -605,9 +626,6 @@ A: Possibly. Bot detection is an arms race. Source-level patches are harder to d
 **Q: Can I use my own proxy?**
 A: Yes. Pass `proxy="http://user:pass@host:port"` to `launch()`.

-**Q: Can I use this with Docker?**
-A: Yes. A ready-to-use Dockerfile is included — see the [Docker](#docker) section above.
-
 ## Links

 - 📋 **Changelog** — [CHANGELOG.md](CHANGELOG.md)
@@ -619,7 +637,8 @@ A: Yes. A ready-to-use Dockerfile is included — see the [Docker](#docker) sect

 ## License

-MIT — see [LICENSE](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).

 ## Contributing

@@ -1 +1 @@
-__version__ = "0.3.0"
+__version__ = "0.3.4"
@@ -42,7 +42,7 @@ def launch(
        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 --timezone binary flag.
+        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
@@ -108,7 +108,7 @@ async def launch_async(
        proxy: Proxy server URL (e.g. 'http://proxy:8080' or 'socks5://proxy:1080').
        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 --timezone binary flag.
+        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).
        **kwargs: Passed directly to playwright.chromium.launch().
@@ -198,8 +198,11 @@ def launch_context(
    # Resolve geoip BEFORE launch() to avoid double-resolution and ensure
    # resolved values flow to both binary flags AND context params
    timezone_id, locale = _maybe_resolve_geoip(geoip, proxy, timezone_id, locale)
+    # Skip --fingerprint-timezone binary flag: it only applies to the default
+    # context and interferes with Playwright's timezone_id on new contexts.
+    # Timezone is set via browser.new_context(timezone_id=...) below instead.
    browser = launch(headless=headless, proxy=proxy, args=args, stealth_args=stealth_args,
-                     timezone=timezone_id, locale=locale)
+                     timezone=None, locale=locale)

    context_kwargs: dict[str, Any] = {}
    if user_agent:
@@ -270,7 +273,7 @@ def _build_args(
        result.extend(extra_args)
    # Timezone/locale flags are independent of stealth_args — always inject when set
    if timezone:
-        result.append(f"--timezone={timezone}")
+        result.append(f"--fingerprint-timezone={timezone}")
    if locale:
        result.append(f"--lang={locale}")
    return result
@@ -10,10 +10,20 @@ 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 = "145.0.7632.109"

+PLATFORM_CHROMIUM_VERSIONS: dict[str, str] = {
+    "linux-x64": "145.0.7632.109",
+    "darwin-arm64": "145.0.7632.109",
+    "darwin-x64": "145.0.7632.109",
+    "windows-x64": "145.0.7632.109",
+}
+
 # ---------------------------------------------------------------------------
 # Default stealth arguments passed to the patched Chromium binary.
 # These activate source-level fingerprint patches compiled into the binary.
@@ -37,28 +47,26 @@ def get_default_stealth_args() -> list[str]:
        # 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: spoof as Windows
+    # 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-hardware-concurrency=8",
-        "--fingerprint-device-memory=8",
        "--fingerprint-gpu-vendor=NVIDIA Corporation",
        "--fingerprint-gpu-renderer=NVIDIA GeForce RTX 3070",
-        "--fingerprint-taskbar-height=40",
-        "--fingerprint-screen-width=1920",
-        "--fingerprint-screen-height=1080",
-        "--window-size=1920,1080",
    ]


 # ---------------------------------------------------------------------------
 # Default viewport — realistic maximized Chrome on 1080p Windows
-# screen=1920x1080, availHeight=1040 (minus 40px taskbar),
-# innerHeight=955 (minus ~85px Chrome UI: tabs + address bar + bookmarks)
+# screen=1920x1080, availHeight=1032 (minus 48px taskbar, binary default),
+# innerHeight=947 (minus ~85px Chrome UI: tabs + address bar + bookmarks)
 # ---------------------------------------------------------------------------
-DEFAULT_VIEWPORT = {"width": 1920, "height": 955}
+DEFAULT_VIEWPORT = {"width": 1920, "height": 947}

 # ---------------------------------------------------------------------------
 # Platform detection
@@ -68,11 +76,18 @@ 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.
-# Update this set as new platform builds are released.
-AVAILABLE_PLATFORMS: set[str] = {"linux-x64", "darwin-arm64", "darwin-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:
@@ -105,7 +120,7 @@ def get_cache_dir() -> Path:

 def get_binary_dir(version: str | None = None) -> Path:
    """Return the directory for a Chromium version binary."""
-    v = version or CHROMIUM_VERSION
+    v = version or get_chromium_version()
    return get_cache_dir() / f"chromium-{v}"


@@ -116,6 +131,8 @@ def get_binary_path(version: str | None = None) -> Path:
    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"
@@ -134,30 +151,32 @@ def check_platform_available() -> None:
        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"
-            f"Windows builds are coming soon.\n\n"
-            f"To use CloakBrowser now, run in Docker (see README) or set CLOAKBROWSER_BINARY_PATH."
+            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 hardcoded.
+    """Return the best available version: auto-updated if available, else platform default.

-    Reads the latest_version marker file from the cache directory.
-    Returns CHROMIUM_VERSION if no update has been downloaded.
+    Reads a platform-scoped marker file from the cache directory.
+    Returns the platform's hardcoded version if no update has been downloaded.
    """
-    marker = get_cache_dir() / "latest_version"
-    if marker.exists():
-        try:
-            version = marker.read_text().strip()
-            if version and _version_newer(version, CHROMIUM_VERSION):
-                # Verify the binary actually exists
-                binary = get_binary_path(version)
-                if binary.exists():
-                    return version
-        except (ValueError, OSError):
-            pass
-    return CHROMIUM_VERSION
+    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, ...]:
@@ -187,14 +206,14 @@ GITHUB_DOWNLOAD_BASE_URL = (

 def get_download_url(version: str | None = None) -> str:
    """Return the full download URL for the current platform's binary archive."""
-    v = version or CHROMIUM_VERSION
+    v = version or get_chromium_version()
    tag = get_platform_tag()
    return f"{DOWNLOAD_BASE_URL}/chromium-v{v}/cloakbrowser-{tag}.tar.gz"


 def get_fallback_download_url(version: str | None = None) -> str:
    """Return the GitHub Releases fallback URL for the binary archive."""
-    v = version or CHROMIUM_VERSION
+    v = version or get_chromium_version()
    tag = get_platform_tag()
    return f"{GITHUB_DOWNLOAD_BASE_URL}/chromium-v{v}/cloakbrowser-{tag}.tar.gz"

@@ -20,6 +20,7 @@ from pathlib import Path

 import httpx

+from ._version import __version__ as _wrapper_version
 from .config import (
    CHROMIUM_VERSION,
    DOWNLOAD_BASE_URL,
@@ -30,6 +31,7 @@ from .config import (
    get_binary_dir,
    get_binary_path,
    get_cache_dir,
+    get_chromium_version,
    get_download_url,
    get_effective_version,
    get_fallback_download_url,
@@ -76,18 +78,19 @@ def ensure_binary() -> str:
        _maybe_trigger_update_check()
        return str(binary_path)

-    # Fall back to hardcoded version if effective version binary doesn't exist
-    if effective != CHROMIUM_VERSION:
+    # 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 hardcoded version
+    # 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()
@@ -168,7 +171,7 @@ def _verify_download_checksum(file_path: Path, version: str | None = None) -> No

 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 CHROMIUM_VERSION
+    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)
@@ -327,7 +330,9 @@ 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)

@@ -384,7 +389,7 @@ def check_for_update() -> str | None:
    latest = _get_latest_chromium_version()
    if latest is None:
        return None
-    if not _version_newer(latest, CHROMIUM_VERSION):
+    if not _version_newer(latest, get_chromium_version()):
        return None

    binary_dir = get_binary_dir(latest)
@@ -420,16 +425,23 @@ def _should_check_for_update() -> bool:


 def _get_latest_chromium_version() -> str | None:
-    """Hit GitHub Releases API, return latest chromium-v* version string or 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 = f"cloakbrowser-{get_platform_tag()}.tar.gz"
        for release in resp.json():
            tag = release.get("tag_name", "")
            if tag.startswith("chromium-v") and not release.get("draft"):
-                return tag.removeprefix("chromium-v")
+                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)
@@ -437,16 +449,47 @@ def _get_latest_chromium_version() -> str | None:


 def _write_version_marker(version: str) -> None:
-    """Write the latest version marker to cache dir."""
+    """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 / "latest_version"
+    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:
@@ -455,10 +498,11 @@ def _check_and_download_update() -> None:
        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, CHROMIUM_VERSION):
+        if not _version_newer(latest, platform_version):
            return

        # Already downloaded?
@@ -469,7 +513,7 @@ def _check_and_download_update() -> None:
        logger.info(
            "Newer Chromium available: %s (current: %s). Downloading in background...",
            latest,
-            CHROMIUM_VERSION,
+            platform_version,
        )
        _download_and_extract(version=latest)
        _write_version_marker(latest)
@@ -483,6 +527,12 @@ def _check_and_download_update() -> None:

 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)
@@ -13,6 +13,7 @@ Usage:
 """

 import sys
+import time

 from cloakbrowser import launch_context

@@ -27,7 +28,7 @@ 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)
-    page.wait_for_timeout(20000)  # Castle.js needs time to compute score
+    time.sleep(20)  # Castle.js needs time to compute score

    # Check bot risk score
    score = page.evaluate(
@@ -92,7 +93,7 @@ def test_creepjs(page):
        "https://abrahamjuliot.github.io/creepjs/", wait_until="domcontentloaded", timeout=30000
    )
    print("Waiting 30s for CreepJS analysis...")
-    page.wait_for_timeout(30000)
+    time.sleep(30)

    # Extract % scores from page text (matches test-infra/matrix_tests/group3_bot_detection.py)
    scores = page.evaluate("""() => {
@@ -190,7 +191,7 @@ def main():
        args=[
            "--fingerprint-screen-width=1920",
            "--fingerprint-screen-height=1080",
-            "--timezone=Asia/Jerusalem",
+            "--fingerprint-timezone=Asia/Jerusalem",
        ],
    )
    page = context.new_page()
@@ -143,11 +143,15 @@ 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
-    time.sleep(8)
+    # Wait for backend response (step3 element appears when score arrives)
+    try:
+        page.wait_for_selector("li.step3", timeout=20000)
+        time.sleep(1)
+    except Exception:
+        time.sleep(10)  # fallback

    results = page.evaluate("""() => {
        const text = document.body.innerText;
@@ -72,10 +72,10 @@ const browser = await launch({ headless: false });

 // Extra Chrome args
 const browser = await launch({
-  args: ['--window-size=1920,1080'],
+  args: ['--fingerprint=12345'],
 });

-// With timezone and locale (sets --timezone and --lang binary flags)
+// With timezone and locale (sets --fingerprint-timezone and --lang binary flags)
 const browser = await launch({
  timezone: 'America/New_York',
  locale: 'en-US',
@@ -155,6 +155,7 @@ if (newVersion) console.log(`Updated to ${newVersion}`);
 | `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

@@ -175,9 +176,7 @@ const page = await browser.newPage();
 | Linux x86_64 | ✅ Available |
 | macOS arm64 (Apple Silicon) | ✅ Available |
 | macOS x86_64 (Intel) | ✅ Available |
-| Windows | Planned |
-
-**On Windows?** You can still use CloakBrowser via Docker or with your own Chromium binary by setting `CLOAKBROWSER_BINARY_PATH=/path/to/chrome`.
+| Windows x86_64 | ✅ Available |

 ## Requirements

@@ -216,4 +215,5 @@ Other tips for maximizing reCAPTCHA scores:

 ## License

-MIT — see [LICENSE](https://github.com/CloakHQ/CloakBrowser/blob/main/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).
@@ -1,6 +1,6 @@
 {
  "name": "cloakbrowser",
-  "version": "0.3.0",
+  "version": "0.3.4",
  "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",
@@ -25,12 +25,20 @@
    "playwright",
    "puppeteer",
    "scraping",
+    "web-scraping",
    "anti-detect",
+    "antidetect",
+    "undetected",
    "bot-detection",
    "fingerprint",
    "recaptcha",
    "cloudflare",
-    "datadome"
+    "turnstile",
+    "datadome",
+    "captcha",
+    "headless",
+    "automation",
+    "ai-agent"
  ],
  "license": "MIT",
  "repository": {
@@ -6,12 +6,36 @@
 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
+// 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 = "145.0.7632.109";

+export const PLATFORM_CHROMIUM_VERSIONS: Record<string, string> = {
+  "linux-x64": "145.0.7632.109",
+  "darwin-arm64": "145.0.7632.109",
+  "darwin-x64": "145.0.7632.109",
+  "windows-x64": "145.0.7632.109",
+};
+
 // ---------------------------------------------------------------------------
 // Platform detection
 // ---------------------------------------------------------------------------
@@ -20,11 +44,16 @@ const SUPPORTED_PLATFORMS: Record<string, string> = {
  "linux-arm64": "linux-arm64",
  "darwin-arm64": "darwin-arm64",
  "darwin-x64": "darwin-x64",
+  "win32-x64": "windows-x64",
 };

-// Platforms with pre-built binaries available for download.
-// Update this set as new platform builds are released.
-const AVAILABLE_PLATFORMS = new Set(["linux-x64", "darwin-arm64", "darwin-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;
@@ -36,6 +65,7 @@ export function getPlatformTag(): string {
  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(
@@ -56,7 +86,7 @@ export function getCacheDir(): string {
 }

 export function getBinaryDir(version?: string): string {
-  return path.join(getCacheDir(), `chromium-${version || CHROMIUM_VERSION}`);
+  return path.join(getCacheDir(), `chromium-${version || getChromiumVersion()}`);
 }

 export function getBinaryPath(version?: string): string {
@@ -64,6 +94,9 @@ export function getBinaryPath(version?: string): string {
  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");
 }

@@ -74,9 +107,8 @@ export function checkPlatformAvailable(): void {
  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` +
-        `Windows builds are coming soon.\n\n` +
-        `To use CloakBrowser now, run in Docker (see README) or set CLOAKBROWSER_BINARY_PATH.`
+      `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.`
    );
  }
 }
@@ -95,33 +127,38 @@ export const GITHUB_DOWNLOAD_BASE_URL =
  "https://github.com/CloakHQ/cloakbrowser/releases/download";

 export function getDownloadUrl(version?: string): string {
-  const v = version || CHROMIUM_VERSION;
+  const v = version || getChromiumVersion();
  const tag = getPlatformTag();
  return `${DOWNLOAD_BASE_URL}/chromium-v${v}/cloakbrowser-${tag}.tar.gz`;
 }

 export function getFallbackDownloadUrl(version?: string): string {
-  const v = version || CHROMIUM_VERSION;
+  const v = version || getChromiumVersion();
  const tag = getPlatformTag();
  return `${GITHUB_DOWNLOAD_BASE_URL}/chromium-v${v}/cloakbrowser-${tag}.tar.gz`;
 }

 export function getEffectiveVersion(): string {
-  const marker = path.join(getCacheDir(), "latest_version");
-  try {
-    if (fs.existsSync(marker)) {
-      const version = fs.readFileSync(marker, "utf-8").trim();
-      if (version && versionNewer(version, CHROMIUM_VERSION)) {
-        const binary = getBinaryPath(version);
-        if (fs.existsSync(binary)) {
-          return version;
+  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
    }
-  } catch {
-    // Marker unreadable — fall back to hardcoded
  }
-  return CHROMIUM_VERSION;
+  return base;
 }

 export function parseVersion(v: string): number[] {
@@ -149,9 +186,9 @@ export function getLocalBinaryOverride(): string | undefined {
 // Default stealth arguments
 // ---------------------------------------------------------------------------
 // Default viewport — realistic maximized Chrome on 1080p Windows
-// screen=1920x1080, availHeight=1040 (minus 40px taskbar),
-// innerHeight=955 (minus ~85px Chrome UI: tabs + address bar + bookmarks)
-export const DEFAULT_VIEWPORT = { width: 1920, height: 955 };
+// 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
@@ -165,20 +202,21 @@ export function getDefaultStealthArgs(): string[] {

  if (isMac) {
    // macOS: run as native Mac browser — GPU/UA match natively
-    return [...base, "--fingerprint-platform=macos"];
+    return [
+      ...base,
+      "--fingerprint-platform=macos",
+      "--fingerprint-gpu-vendor=Google Inc. (Apple)",
+      "--fingerprint-gpu-renderer=ANGLE (Apple, ANGLE Metal Renderer: Apple M3, Unspecified Version)",
+    ];
  }

-  // Linux: spoof as Windows
+  // 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-hardware-concurrency=8",
-    "--fingerprint-device-memory=8",
    "--fingerprint-gpu-vendor=NVIDIA Corporation",
    "--fingerprint-gpu-renderer=NVIDIA GeForce RTX 3070",
-    "--fingerprint-taskbar-height=40",
-    "--fingerprint-screen-width=1920",
-    "--fingerprint-screen-height=1080",
-    "--window-size=1920,1080",
  ];
 }
@@ -14,14 +14,15 @@ import { extract as tarExtract } from "tar";

 import type { BinaryInfo } from "./types.js";
 import {
-  CHROMIUM_VERSION,
  DOWNLOAD_BASE_URL,
  GITHUB_API_URL,
  GITHUB_DOWNLOAD_BASE_URL,
+  WRAPPER_VERSION,
  checkPlatformAvailable,
  getBinaryDir,
  getBinaryPath,
  getCacheDir,
+  getChromiumVersion,
  getDownloadUrl,
  getEffectiveVersion,
  getFallbackDownloadUrl,
@@ -66,8 +67,9 @@ export async function ensureBinary(): Promise<string> {
    return binaryPath;
  }

-  // Fall back to hardcoded version if effective version binary doesn't exist
-  if (effective !== CHROMIUM_VERSION) {
+  // 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();
@@ -75,9 +77,9 @@ export async function ensureBinary(): Promise<string> {
    }
  }

-  // Download hardcoded version
+  // Download platform's hardcoded version
  console.log(
-    `[cloakbrowser] Stealth Chromium ${CHROMIUM_VERSION} not found. Downloading for ${getPlatformTag()}...`
+    `[cloakbrowser] Stealth Chromium ${platformVersion} not found. Downloading for ${getPlatformTag()}...`
  );
  await downloadAndExtract();

@@ -120,7 +122,7 @@ export function binaryInfo(): BinaryInfo {
 /** 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, CHROMIUM_VERSION)) return null;
+  if (!latest || !versionNewer(latest, getChromiumVersion())) return null;

  const binaryDir = getBinaryDir(latest);
  if (fs.existsSync(binaryDir)) {
@@ -209,7 +211,7 @@ async function verifyDownloadChecksum(filePath: string, version?: string): Promi
 }

 async function fetchChecksums(version?: string): Promise<Map<string, string> | null> {
-  const v = version || CHROMIUM_VERSION;
+  const v = version || getChromiumVersion();
  const hasCustomUrl = !!process.env.CLOAKBROWSER_DOWNLOAD_URL;

  // Respect custom URL contract — no GitHub fallback when custom URL is set
@@ -233,12 +235,13 @@ async function fetchChecksums(version?: string): Promise<Map<string, string> | n
  return null;
 }

-function parseChecksums(text: string): Map<string, string> {
+/** @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+\*?(.+)$/);
+    const match = trimmed.match(/^([a-f0-9]{64})\s+\*?(.+)$/i);
    if (match) {
      result.set(match[2]!, match[1]!.toLowerCase());
    }
@@ -360,9 +363,9 @@ async function extractArchive(
  // Flatten single subdirectory if needed
  flattenSingleSubdir(destDir);

-  // Make binary executable
+  // Make binary executable (skip on Windows — no-op / AV lock risk)
  const bp = binaryPath || getBinaryPath();
-  if (fs.existsSync(bp)) {
+  if (process.platform !== "win32" && fs.existsSync(bp)) {
    fs.chmodSync(bp, 0o755);
  }

@@ -437,7 +440,8 @@ function shouldCheckForUpdate(): boolean {
  return true;
 }

-async function getLatestChromiumVersion(): Promise<string | null> {
+/** @internal Exported for testing only. */
+export async function getLatestChromiumVersion(): Promise<string | null> {
  try {
    const resp = await fetch(`${GITHUB_API_URL}?per_page=10`, {
      signal: AbortSignal.timeout(10_000),
@@ -446,10 +450,17 @@ async function getLatestChromiumVersion(): Promise<string | null> {
    const releases = (await resp.json()) as Array<{
      tag_name: string;
      draft: boolean;
+      assets: Array<{ name: string }>;
    }>;
+    const platformTarball = `cloakbrowser-${getPlatformTag()}.tar.gz`;
    for (const release of releases) {
      if (release.tag_name.startsWith("chromium-v") && !release.draft) {
-        return release.tag_name.replace("chromium-v", "");
+        const assetNames = new Set(
+          (release.assets ?? []).map((a) => a.name)
+        );
+        if (assetNames.has(platformTarball)) {
+          return release.tag_name.replace(/^chromium-v/, "");
+        }
      }
    }
    return null;
@@ -461,12 +472,42 @@ async function getLatestChromiumVersion(): Promise<string | null> {
 function writeVersionMarker(version: string): void {
  const cacheDir = getCacheDir();
  fs.mkdirSync(cacheDir, { recursive: true });
-  const marker = path.join(cacheDir, "latest_version");
+  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)
@@ -477,8 +518,9 @@ async function checkAndDownloadUpdate(): Promise<void> {
      String(Date.now())
    );

+    const platformVersion = getChromiumVersion();
    const latest = await getLatestChromiumVersion();
-    if (!latest || !versionNewer(latest, CHROMIUM_VERSION)) return;
+    if (!latest || !versionNewer(latest, platformVersion)) return;

    // Already downloaded?
    if (fs.existsSync(getBinaryDir(latest))) {
@@ -487,7 +529,7 @@ async function checkAndDownloadUpdate(): Promise<void> {
    }

    console.log(
-      `[cloakbrowser] Newer Chromium available: ${latest} (current: ${CHROMIUM_VERSION}). Downloading in background...`
+      `[cloakbrowser] Newer Chromium available: ${latest} (current: ${platformVersion}). Downloading in background...`
    );
    await downloadAndExtract(latest);
    writeVersionMarker(latest);
@@ -503,7 +545,12 @@ async function checkAndDownloadUpdate(): Promise<void> {
 }

 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;
-  // Fire-and-forget — don't await
  checkAndDownloadUpdate().catch(() => {});
 }
@@ -121,7 +121,7 @@ function buildArgs(options: LaunchOptions): string[] {
  }
  // Timezone/locale flags — always inject when set
  if (options.timezone) {
-    args.push(`--timezone=${options.timezone}`);
+    args.push(`--fingerprint-timezone=${options.timezone}`);
  }
  if (options.locale) {
    args.push(`--lang=${options.locale}`);
@@ -90,7 +90,7 @@ function buildArgs(options: LaunchOptions): string[] {
    args.push(...options.args);
  }
  if (options.timezone) {
-    args.push(`--timezone=${options.timezone}`);
+    args.push(`--fingerprint-timezone=${options.timezone}`);
  }
  if (options.locale) {
    args.push(`--lang=${options.locale}`);
@@ -11,7 +11,7 @@ export interface LaunchOptions {
  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 --timezone binary flag. */
+  /** 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;
@@ -1,6 +1,7 @@
 import { describe, it, expect } from "vitest";
 import {
  CHROMIUM_VERSION,
+  getChromiumVersion,
  getDefaultStealthArgs,
  getCacheDir,
  getBinaryDir,
@@ -10,7 +11,7 @@ import { _buildArgsForTest } from "../src/playwright.js";

 describe("config", () => {
  it("CHROMIUM_VERSION matches expected format", () => {
-    expect(CHROMIUM_VERSION).toMatch(/^\d+\.\d+\.\d+\.\d+$/);
+    expect(CHROMIUM_VERSION).toMatch(/^\d+\.\d+\.\d+\.\d+(\.\d+)?$/);
  });

  it("getDefaultStealthArgs returns expected flags", () => {
@@ -53,14 +54,14 @@ describe("config", () => {
    expect(dir).toContain(".cloakbrowser");
  });

-  it("getBinaryDir includes version", () => {
+  it("getBinaryDir includes platform version", () => {
    const dir = getBinaryDir();
-    expect(dir).toContain(`chromium-${CHROMIUM_VERSION}`);
+    expect(dir).toContain(`chromium-${getChromiumVersion()}`);
  });

-  it("getDownloadUrl contains version and platform tag", () => {
+  it("getDownloadUrl contains platform version and platform tag", () => {
    const url = getDownloadUrl();
-    expect(url).toContain(CHROMIUM_VERSION);
+    expect(url).toContain(getChromiumVersion());
    expect(url).toContain("cloakbrowser-");
    expect(url).toContain(".tar.gz");
    expect(url).toContain("cloakbrowser.dev");
@@ -68,9 +69,9 @@ describe("config", () => {
 });

 describe("buildArgs timezone/locale", () => {
-  it("injects --timezone when timezone is set", () => {
+  it("injects --fingerprint-timezone when timezone is set", () => {
    const args = _buildArgsForTest({ timezone: "America/New_York" });
-    expect(args).toContain("--timezone=America/New_York");
+    expect(args).toContain("--fingerprint-timezone=America/New_York");
  });

  it("injects --lang when locale is set", () => {
@@ -80,20 +81,20 @@ describe("buildArgs timezone/locale", () => {

  it("injects both when both are set", () => {
    const args = _buildArgsForTest({ timezone: "Europe/Berlin", locale: "de-DE" });
-    expect(args).toContain("--timezone=Europe/Berlin");
+    expect(args).toContain("--fingerprint-timezone=Europe/Berlin");
    expect(args).toContain("--lang=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("--timezone=America/New_York");
+    expect(args).toContain("--fingerprint-timezone=America/New_York");
    expect(args).toContain("--lang=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("--timezone="))).toBe(false);
+    expect(args.some(a => a.startsWith("--fingerprint-timezone="))).toBe(false);
    expect(args.some(a => a.startsWith("--lang="))).toBe(false);
  });
 });
@@ -1,13 +1,13 @@
 import { describe, it, expect } from "vitest";
 import { binaryInfo } from "../src/download.js";
-import { CHROMIUM_VERSION } from "../src/config.js";
+import { getChromiumVersion } from "../src/config.js";

 describe("binaryInfo", () => {
  it("returns correct structure", () => {
    const info = binaryInfo();

-    expect(info.version).toBe(CHROMIUM_VERSION);
-    expect(info.platform).toMatch(/^(linux|darwin)-(x64|arm64)$/);
+    expect(info.version).toBe(getChromiumVersion());
+    expect(info.platform).toMatch(/^(linux|darwin|windows)-(x64|arm64)$/);
    expect(info.binaryPath).toBeTruthy();
    expect(typeof info.installed).toBe("boolean");
    expect(info.cacheDir).toContain("cloakbrowser");
@@ -1,11 +1,19 @@
-import { describe, it, expect } from "vitest";
+import { describe, it, expect, vi, afterEach, beforeEach } from "vitest";
 import {
  CHROMIUM_VERSION,
+  getChromiumVersion,
  getDownloadUrl,
  getEffectiveVersion,
+  getPlatformTag,
  parseVersion,
  versionNewer,
 } from "../src/config.js";
+import {
+  checkWrapperUpdate,
+  getLatestChromiumVersion,
+  parseChecksums,
+  resetWrapperUpdateChecked,
+} from "../src/download.js";

 describe("version comparison", () => {
  it("parseVersion handles 4-part versions", () => {
@@ -32,13 +40,29 @@ describe("version comparison", () => {
  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${CHROMIUM_VERSION}`);
+    expect(url).toContain(`chromium-v${getChromiumVersion()}`);
    expect(url.endsWith(".tar.gz")).toBe(true);
  });

@@ -53,9 +77,197 @@ describe("download URL", () => {
  });
 });

+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("effective version", () => {
-  it("returns CHROMIUM_VERSION when no marker exists", () => {
+  it("returns platform version when no marker exists", () => {
    // Default behavior — no marker file in test environment
-    expect(getEffectiveVersion()).toBe(CHROMIUM_VERSION);
+    expect(getEffectiveVersion()).toBe(getChromiumVersion());
  });
 });
@@ -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",
@@ -4,9 +4,9 @@ from cloakbrowser.browser import _build_args


 def test_timezone_injected():
-    """--timezone flag should appear when timezone is set."""
+    """--fingerprint-timezone flag should appear when timezone is set."""
    args = _build_args(stealth_args=True, extra_args=None, timezone="America/New_York")
-    assert "--timezone=America/New_York" in args
+    assert "--fingerprint-timezone=America/New_York" in args


 def test_locale_injected():
@@ -18,14 +18,14 @@ def test_locale_injected():
 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 "--timezone=Europe/Berlin" in args
+    assert "--fingerprint-timezone=Europe/Berlin" in args
    assert "--lang=de-DE" in args


 def test_timezone_independent_of_stealth_args():
-    """--timezone should be injected even when stealth_args=False."""
+    """--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 "--timezone=America/New_York" in args
+    assert "--fingerprint-timezone=America/New_York" in args
    assert "--lang=en-US" in args
    # No stealth fingerprint args
    assert not any(a.startswith("--fingerprint=") for a in args)
@@ -34,7 +34,7 @@ def test_timezone_independent_of_stealth_args():
 def test_no_flags_when_not_set():
    """No timezone/lang flags when params are None."""
    args = _build_args(stealth_args=True, extra_args=None)
-    assert not any(a.startswith("--timezone=") for a in args)
+    assert not any(a.startswith("--fingerprint-timezone=") for a in args)
    assert not any(a.startswith("--lang=") for a in args)


@@ -42,5 +42,5 @@ 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 "--timezone=Asia/Tokyo" in args
+    assert "--fingerprint-timezone=Asia/Tokyo" in args
    assert "--lang=ja-JP" in args
@@ -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():
@@ -2,6 +2,7 @@

 from __future__ import annotations

+import hashlib
 import os
 from pathlib import Path
 from unittest.mock import MagicMock, patch
@@ -12,12 +13,17 @@ 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,
    _get_latest_chromium_version,
+    _parse_checksums,
    _should_check_for_update,
+    _verify_checksum,
 )


@@ -41,12 +47,27 @@ class TestVersionComparison:
    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{CHROMIUM_VERSION}" in url
+        assert f"chromium-v{get_chromium_version()}" in url
        assert url.endswith(".tar.gz")

    def test_custom_version_url(self):
@@ -111,30 +132,42 @@ class TestShouldCheckForUpdate:


 class TestEffectiveVersion:
-    def test_no_marker_returns_hardcoded(self, tmp_path):
+    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() == CHROMIUM_VERSION
+            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 / "latest_version"
+            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() == CHROMIUM_VERSION
+            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 / "latest_version"
+            marker = tmp_path / f"latest_version_{get_platform_tag()}"
            marker.write_text("100.0.0.0")
-            assert get_effective_version() == CHROMIUM_VERSION
+            assert get_effective_version() == get_chromium_version()


 class TestGetLatestVersion:
-    def test_parses_chromium_tag(self):
+    """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},
-            {"tag_name": "chromium-v142.0.7444.175", "draft": False},
+            {
+                "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()

@@ -142,11 +175,37 @@ class TestGetLatestVersion:
            result = _get_latest_chromium_version()
            assert result == "145.0.7718.0"

-    def test_skips_draft_releases(self):
+    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-v999.0.0.0", "draft": True},
-            {"tag_name": "chromium-v145.0.7718.0", "draft": False},
+            {
+                "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()

@@ -156,9 +215,10 @@ class TestGetLatestVersion:

    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},
-            {"tag_name": "chromium-v145.0.7718.0", "draft": False},
+            {"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()

@@ -166,7 +226,133 @@ class TestGetLatestVersion:
            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)
Author	SHA1	Message	Date
CloakHQ	1315ebcaf6	release: v0.3.4 — 26 patches, auto-spoof, timezone fix, README refresh	2026-03-04 01:11:50 +01:00
CloakHQ	5d7f7360d8	refactor: simplify stealth args — rely on binary auto-generation (v14+) Binary v14+ auto-generates hardware concurrency, device memory, screen dimensions, and window size from the fingerprint seed. Remove these explicit flags from Python/JS wrapper defaults and update README: - Remove 5 flags from get_default_stealth_args() in both wrappers - Move hardware-concurrency, device-memory, screen-width, screen-height to the Additional Flags table with auto-generated defaults documented - Update code examples to use --fingerprint instead of --window-size - Simplify fingerprint defaults table to show only wrapper-set flags	2026-03-03 21:27:01 +01:00
CloakHQ	4e95822446	release: v0.3.3 — Windows x64, macOS v145, auto-spoof docs Bump wrapper to 0.3.3. Update README fingerprint section to document auto-spoof behavior (zero-config stealth). Improve reCAPTCHA test with wait_for_selector instead of blind sleep.	2026-03-03 20:05:16 +01:00
CloakHQandDurafen	408a582117	feat: add Windows x64 support, update macOS to v145	2026-03-03 08:57:07 +01:00
CloakHQandDurafen	fe567d7a5a	feat: macOS v145 wrapper prep — GPU flags, version bump, README update - Add explicit Mac GPU flags (Apple M3 Metal renderer) to stealth args - Bump macOS platform versions to 145.0.7632.109 - Update README fingerprint table to reflect actual Mac GPU defaults - Add warning about binary requiring explicit flags without wrapper - Fix stealth_test.py wait_until for reCAPTCHA page	2026-03-03 08:57:07 +01:00
CloakHQ	53c9eb581d	docs: add binary license, update license sections in READMEs	2026-03-03 08:48:05 +01:00
CloakHQ	d8960447a0	feat: add wrapper version update checks for PyPI and npm Check for newer wrapper versions on startup (once per process). Python queries PyPI, JS queries npm registry. Respects CLOAKBROWSER_AUTO_UPDATE=false and CLOAKBROWSER_DOWNLOAD_URL (custom mirror mode skips external registry calls). Includes unit tests for both languages covering: update detection, env var gating, network error handling, and once-per-process guard.	2026-03-03 01:21:41 +01:00
CloakHQ	1ad2b8d3a9	docs: release v0.3.0 changelog, expand PyPI keywords	2026-03-02 23:42:23 +01:00
CloakHQ	3afe20cda2	fix: sync wrapper with v11-v13 binary changes - Rename --timezone to --fingerprint-timezone (breaking binary change in v13) - Remove --fingerprint-taskbar-height from defaults (binary auto-applies per platform) - Update viewport height 955→947 (48px Win taskbar default) - Update patch count 26→25 (patch 003 deleted in v11) - Document new flags: --fingerprint-fonts-dir, --enable-blink-features=FakeShadowRoot, --fingerprint-taskbar-height (optional override) - Fix README: remove incorrect "defaults to windows" claim	2026-03-02 23:13:04 +01:00
CloakHQ	3b256c413b	docs: overhaul README — hero GIF, comparison table, streamlined structure - Move Turnstile GIF and comparison table to hero section - Add migration diff, Docker proxy example, geoip install note - Consolidate duplicate sections (timezone/locale, Playwright migration) - Update Camoufox status, Chromium 145 to released, test date to Mar 2026 - Add missing fingerprint flags to default args table - Remove redundant Puppeteer code block, simplify to inline reference - Add SHA-256 checksum verification mention - Add AI browser agent compatibility note	2026-03-02 17:47:41 +01:00
CloakHQ	a4b6caff47	fix: code review — breaking change docs, version marker migration, checksum tests - Document playwright→patchright breaking change in CHANGELOG - Document default viewport change (1920x955) in CHANGELOG - Add legacy latest_version marker fallback for <0.3.0 upgrades - Add checksum parsing/verification tests (Python + JS) - Document CLOAKBROWSER_SKIP_CHECKSUM env var in README - Fix case-insensitive SHA256SUMS regex in JS - Replace page.wait_for_timeout() with time.sleep() in example	2026-03-02 09:03:57 +01:00
CloakHQ	fc10bdf13e	feat: per-platform Chromium versioning and build number support - Add PLATFORM_CHROMIUM_VERSIONS map (Linux=v145, macOS=v142) - Add get_chromium_version()/getChromiumVersion() for platform-specific version - Make auto-update check release assets before offering updates - Scope version markers per-platform (latest_version_linux-x64) - Support 5th version segment for hotfix builds (e.g. 145.0.7632.109.2) - Derive AVAILABLE_PLATFORMS from version map	2026-03-02 08:23:44 +01:00