title: "Selenium 4.35 Released!"

linkTitle: "Selenium 4.35 Released!"

date: 2025-08-12

tags: [ "selenium" ]

categories: [ "releases" ]

author: Diego Molina [@diemol](https://www.diemol.com)

images:

- "/images/blog/2025/selenium_4.35.jpg"

description: >

We’re excited to announce the release of **Selenium 4.35** for Javascript, Ruby, Python, .NET, Java

and the Grid! 🎉

Links to all assets can be found on our [downloads page][downloads].

- **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`)

- 🔒 Guarded support for Firefox Beta

- 🚫 Removed deprecated local/session storage APIs

- 🆗 Allowed use of `rubyzip` v3

- ✂️ Excluded Rakefile from line-length linter

- ⚠️ Added support for `SameSite=default`

- 🧪 Updated base URL for Edge WebDriver

- ⬆️ Dependency upgrades (`zip`, `rstest`, `which`, Bazel lock files)

- 🔧 Improved architecture normalization for Plausible analytics

- 🔁 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](https://github.com/SeleniumHQ/docker-selenium/pull/2930))

- Docker: Distributor uses Greedy as the slot selector strategy default in Hub-Node and Standalone mode ([#2915](https://github.com/SeleniumHQ/docker-selenium/pull/2915))

- Docker: Update Google Noto font family to support better language character displays ([#2914](https://github.com/SeleniumHQ/docker-selenium/pull/2914))

- [See all changes](https://github.com/SeleniumHQ/docker-selenium/releases)

<br>

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](https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.35.0).

<br>

**Special shout-out to everyone who helped the Selenium Team get this release out!**

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**Thanks as well to all the team members who contributed to this release:**

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Stay tuned for updates by following SeleniumHQ on:

- [Mastodon](https://mastodon.social/@seleniumHQ@fosstodon.org)

- [BlueSky](https://bsky.app/profile/seleniumconf.bsky.social)

- [LinkedIn](https://www.linkedin.com/company/selenium/)

- [Selenium Community YouTube Channel](https://www.youtube.com/@SeleniumHQProject/streams)

- [X (Formerly Twitter)](https://twitter.com/seleniumhq)

Happy automating!

[downloads]: /downloads

[bindings]: /downloads#bindings

[team]: /project/structure

[BiDi]: https://github.com/w3c/webdriver-bidi

Nuget latest release is 4.35.0 Released on August 12, 2025.

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4.35.0 (August 12, 2025)

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4.35.0 (August 12, 2025)

4.35.0 (August 12, 2025)