Selenium 4.35 Released!

Today we’re happy to announce that Selenium 4.35 has been released!

By Diego Molina @diemol | Tuesday, August 12, 2025

🔦 Highlights

Chrome DevTools support is now: v139, v138, and v137.
BiDi Improvements Across Bindings: Expanded BiDi support including emulation, input, script execution, and user context enhancements.
Java Cleanup and JSpecify Annotations: Deprecated APIs removed and comprehensive @Nullable annotations added for better type safety.
Grid Performance Enhancements: Improved logging, reduced redundancy, race condition fixes, and migration from Guava to Caffeine.
Better Proxy and Network Handling: Support for SameSite=default, IPv6 improvements, and fixes for proxy authentication and WebView2.
Logging Improvements: Driver logs in .NET are more structured and can output to console or file with timestamps.

🔧 Added support for:
- BiDi emulation module
- SameSite=default for cookies
- Shadow DOM element normalization
🧹 Major cleanup of deprecated classes:
- LocationContext, WebStorage, FirefoxBinary, SessionStorage, AppCacheStatus, and more
✅ Enhanced test coverage: --connect-existing WebSocket check
📝 Added JSpecify @Nullable annotations across all driver services and locator classes
🧼 Memory/resource improvements:
- Released HttpClient resources
- Removed unused internal classes

🧠 BiDi enhancements:
- Implemented input and emulation modules
- Added pin, unpin, and execute for scripts
- Supported accept_insecure_certs, proxy, and unhandled_prompt_behavior in user context
🔧 Improved handling for:
- Proxy authentication with special characters
- WebView2 + CDP/BiDi compatibility
- Vendor prefix fix for Edge
📦 Loosened dependency for urllib3, and included IPv6 support for free_port()
📚 API documentation improvements, including nightly builds and license notices

💡 Logging Enhancements:
- Timestamps for Chromium-based browser logs
- GeckoDriver log file support
- Default log level now WARN
- Console output support for all drivers
🧠 BiDi enhancements:
- Exposed internal methods and new result types
- User context supports UnhandledPromptBehavior, proxy, accept_insecure_certs
- Tree and Emulation modules added
🧹 Cleanup:
- Removed long-deprecated members
- Reduced internal tracing noise
🔄 Native packaging for Selenium Manager
🌐 IPv6 support for port allocation

🧪 BiDi:
- Stability fix for flaky cookie network test
- Skip FedCM tests until Chrome 140
⚠️ Added SameSite=default cookie support
🔄 Dependency updates (typescript, @emotion/styled)

🔁 Performance and logging improvements:
- Reduced duplicate logs
- Improved node health checks
- Better session map handling and retry queue management
🧰 Switched from Guava’s CacheBuilder to Caffeine
🧪 New UI sorting option by URI

K8s: Add config for over-provision ratio in autoscaling deployment of Nodes (#2930)
Docker: Distributor uses Greedy as the slot selector strategy default in Hub-Node and Standalone mode (#2915)
Docker: Update Google Noto font family to support better language character displays (#2914)
See all changes

We thank all our contributors for their incredible efforts in making Selenium better with every release. ❤️

For a detailed look at all changes, check out the release notes.