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title Selenium 4.30 Released!
linkTitle Selenium 4.30 Released!
date 2025-03-21
tags
selenium
categories
releases
author Diego Molina [@diemol](https://www.diemol.com)
images
/images/blog/2025/selenium_4.30.jpg
description Today we're happy to announce that Selenium 4.30 has been released!

We're very happy to announce the release of Selenium 4.30 for Javascript, Ruby, Python, .NET, Java and the Grid! This version brings key updates across the project, with improvements to the BiDi protocol, extensive nullability work in .NET, better error handling, and various bug fixes. It’s a great step forward as we continue strengthening Selenium’s stability, consistency, and support across all supported languages.

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

🚀 Major Highlights

  • Continued enhancements to BiDi (Bi-Directional Protocol) support across Java, Ruby, .NET, JavaScript, and Python.
  • Extensive nullability annotations added throughout the .NET bindings.
  • Selenium Manager (Rust) now supports nightly Grid builds.
  • Improvements to testing infrastructure and developer experience, including better packaging, linting, and platform support.
  • Numerous bug fixes and refactors across the Grid, bindings, and devtools.

🔹 Language-Specific Changes

Java

  • Implemented BiDi commands: getBidiSessionStatus and Permissions.
  • Refined logger initialization.
  • Removed deprecated, non-W3C compliant NetworkConnection interface.
  • Added support for setting viewport and handling CDP warnings gracefully.

Python

  • Improved devtools test handling and documentation.
  • Fixed packaging issues and test discovery for pytest.
  • Added docstring updates for clarity and modernization.
  • Replaced strings with By class attributes.
  • Improved socket resource management and error handling.
  • Updated expected_conditions type annotations.

JavaScript

  • Fixed BiDi tests for Chrome and Firefox on CI.
  • Implemented BiDi permissions module commands.

Ruby

  • Fixed a compatibility issue with Ruby 3.1 ("no anonymous block parameter").
  • Added BiDi support for:
    • Setting viewport
    • Activating browser context
    • Providing responses
  • Added a target_type parameter to devtools.

.NET

  • Enabled nullable reference types across many components.
  • Trimmed away CDP for AOT applications.
  • Enhanced BiDi support including:
    • SetFiles command
    • Support for UnhandledPromptBehavior
    • Event support like OnNavigationCommitted
    • Encapsulation of the transport layer
  • Improved WebDriver, WebElement, and capabilities types with nullability.
  • Introduced SystemClock singleton.
  • Revisited and fixed test execution on Windows/macOS.
  • Removed obsoleted members for 4.30.

Grid & Selenium Manager

  • Added trace logging for session stop events in Grid.
  • Improved configuration options for server timeouts and session handling.
  • Added support in Selenium Manager (Rust) for nightly Grid builds.
  • Enhanced ability to trace and view live sessions.

Docker Selenium

  • Helm config: Node Relay to extend autoscaling Grid with test cloud resources (#2703).
  • Docker: Disable HeapDumpOnOutOfMemoryError by default (#2708)
  • 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.


Contributors

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

Selenium

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Selenium Docs & Website

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Docker Selenium

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Selenium Team Members

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

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Happy automating!