Release v1.3.0

[1.3.0] - 2026-01-08

🌐 Phase 14.1: Multi-Browser Foundation

New Feature: Cross-Browser Support

• Browser Adapter Pattern: New BrowserAdapter architecture supporting Chromium, Firefox, and WebKit
• Mission Control Integration: Browser selector dropdown in Hub card for one-click browser switching
• Zero Protocol Changes: Sentinels remain 100% browser-agnostic (no breaking changes)

Performance Benchmarks:

• Chromium: ~715ms startup
• Firefox: ~1099ms startup
• WebKit: ~545ms startup

Configuration:

{
  "hub": {
    "browser": {
      "engine": "chromium"  // or "firefox" or "webkit"
    }
  }
}

Browser Capabilities:

Browser	Shadow DOM Piercing	CDP Access	Device Emulation
Chromium	✅ Full	✅ Full	✅ Full
Firefox	⚠️ Limited	❌ None	⚠️ Limited
WebKit	⚠️ Limited	❌ None	✅ Full (iOS)

🐛 Bug Fixes

• Fixed deprecated datetime.utcnow() in A11ySentinel (Python 3.12+ compatible)