5chan/.codex/skills/playwright-cli/references/session-management.md

Browser Session Management

Run multiple isolated browser sessions concurrently with state persistence.

Named Browser Sessions

Use -b flag to isolate browser contexts:

# Browser 1: Authentication flow
playwright-cli -s=auth open https://app.example.com/login

# Browser 2: Public browsing (separate cookies, storage)
playwright-cli -s=public open https://example.com

# Commands are isolated by browser session
playwright-cli -s=auth fill e1 "user@example.com"
playwright-cli -s=public snapshot

Browser Session Isolation Properties

Each browser session has independent:

• Cookies
• LocalStorage / SessionStorage
• IndexedDB
• Cache
• Browsing history
• Open tabs

Browser Session Commands

# List all browser sessions
playwright-cli list

# Stop a browser session (close the browser)
playwright-cli close                # stop the default browser
playwright-cli -s=mysession close   # stop a named browser

# Stop all browser sessions
playwright-cli close-all

# Forcefully kill all daemon processes (for stale/zombie processes)
playwright-cli kill-all

# Delete browser session user data (profile directory)
playwright-cli delete-data                # delete default browser data
playwright-cli -s=mysession delete-data   # delete named browser data

Environment Variable

Set a default browser session name via environment variable:

export PLAYWRIGHT_CLI_SESSION="mysession"
playwright-cli open example.com  # Uses "mysession" automatically

Common Patterns

Concurrent Scraping

#!/bin/bash
# Scrape multiple sites concurrently

# Start all browsers
playwright-cli -s=site1 open https://site1.com &
playwright-cli -s=site2 open https://site2.com &
playwright-cli -s=site3 open https://site3.com &
wait

# Take snapshots from each
playwright-cli -s=site1 snapshot
playwright-cli -s=site2 snapshot
playwright-cli -s=site3 snapshot

# Cleanup
playwright-cli close-all

A/B Testing Sessions

# Test different user experiences
playwright-cli -s=variant-a open "https://app.com?variant=a"
playwright-cli -s=variant-b open "https://app.com?variant=b"

# Compare
playwright-cli -s=variant-a screenshot
playwright-cli -s=variant-b screenshot

Persistent Profile

By default, browser profile is kept in memory only. Use --persistent flag on open to persist the browser profile to disk:

# Use persistent profile (auto-generated location)
playwright-cli open https://example.com --persistent

# Use persistent profile with custom directory
playwright-cli open https://example.com --profile=/path/to/profile

Default Browser Session

When -s is omitted, commands use the default browser session:

# These use the same default browser session
playwright-cli open https://example.com
playwright-cli snapshot
playwright-cli close  # Stops default browser

Browser Session Configuration

Configure a browser session with specific settings when opening:

# Open with config file
playwright-cli open https://example.com --config=.playwright/my-cli.json

# Open with specific browser
playwright-cli open https://example.com --browser=firefox

# Open in headed mode
playwright-cli open https://example.com --headed

# Open with persistent profile
playwright-cli open https://example.com --persistent

Best Practices

1. Name Browser Sessions Semantically

# GOOD: Clear purpose
playwright-cli -s=github-auth open https://github.com
playwright-cli -s=docs-scrape open https://docs.example.com

# AVOID: Generic names
playwright-cli -s=s1 open https://github.com

2. Always Clean Up

# Stop browsers when done
playwright-cli -s=auth close
playwright-cli -s=scrape close

# Or stop all at once
playwright-cli close-all

# If browsers become unresponsive or zombie processes remain
playwright-cli kill-all

3. Delete Stale Browser Data

# Remove old browser data to free disk space
playwright-cli -s=oldsession delete-data