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Selenium.Support

4.49.0128M downloads/moSeleniumHQ/selenium ↗New releases in your daily digest, changelog included.

Selenium is a set of different software tools each with a different approach to supporting browser automation. These tools are highly flexible, allowing many options for locating and manipulating elements within a browser, and one of its key features is the support for automating multiple browser platforms. This package contains the .NET bindings for the concise and object-based Selenium WebDriver API, which uses native OS-level events to manipulate the browser, bypassing the JavaScript sandbox, and does not require the Selenium Server to automate the browser.

Last release 11 days ago
09 Sep 2026
Ships fairly regularly
a new release about every 5 weeks
Nearly every release is documented
notes for 60 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
15 years old
173 releases · first in 2011

Release timeline

173 releases since 2011

Releases

4.40.018 Jan 2026
See the latest changes, included in this release, at https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/CHANGELOG.
See the latest changes, included in this release, at https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/CHANGELOG.
Additional notes
Detailed Changelogs by Component

Java | Python | DotNet | Ruby | JavaScript

What's Changed
Click to see all the changes included in this release

[dotnet] Modernize EnvironmentManager, standardize assembly teardown by @RenderMichael in #15551

[java] Refactor tests by @asolntsev in #16684

[ci]: bump cargo lockfile by @navin772 in #16698

[java][BiDi] change emulation commands return type to void by @Delta456 in #16699

[java] simplify strings processing by @iampopovich in #15309

Fix few more flaky ruby tests by @asolntsev in #16695

[bazel] Switch to custom closure_js_deps rule by @shs96c in #16571

[dotnet] [bidi] Support SetScreenSettingsOverrideAsync method in Emulation module by @nvborisenko in #16704

[dotnet] Modernize code patterns in test suites by @RenderMichael in #16701

use proper AssertJ asserts that generate a useful error message by @asolntsev in #16707

fix Java language level in IDEA by @asolntsev in #16708

[py] Properly verify Selenium Manager exists by @cgoldberg in #16711

fix flaky Ruby test element_spec.rb by @asolntsev in #16709

[java][BiDi] implement emulation.setScreenOrientationOverride by @Delta456 in #16705

[rb] add synchronization and error handling for socket interactions by @titusfortner in #16487

[rb] mark low level bidi implementation as private api by @titusfortner in #16475

[rb] ensure driver process is always stopped by @titusfortner in #15635

[rb] create user-friendly method for enabling bidi by @titusfortner in #14284

[dotnet] [bidi] Added missing Script.RemoteReference LocaclValue type by @nvborisenko in #16717

[dotnet] Standardize IEquatable<T> implementations across types overriding Equals by @RenderMichael in #16665

[dotnet] Fix nullability warnings in WebDriver by @RenderMichael in #16662

[py] Don't compare object identity in conftest by @cgoldberg in #16723

#16720 avoid failing because of temporary Chrome internal files by @asolntsev in #16722

[rb] Add force encoding to remove warnings caused by json 3.0 by @aguspe in #16728

[py] Remove deprecated FTP proxy support by @cgoldberg in #16721

[py] Bump ruff and mypy versions by @cgoldberg in #16737

Create target directories before copying file by @MohabMohie in #16739

[bazel+closure]: Vendor the version of closure library we use by @shs96c in #16742

[closure] Fix failing //javascript/atoms:test-* targets by @shs96c in #16749

Avoid sleep in tests by @asolntsev in #16713

[bazel] Bump rules_closure and google closure libary to latest release by @shs96c in #16755

[refactor] call WebDriverException constructor instead of using reflection by @asolntsev in #16763

[build] Pin Browsers in Bazel by default by @titusfortner in #16743

[build] build selenium manager for tests by @titusfortner in #16736

[refactor] replace JUnit assertions by AssertJ by @asolntsev in #16765

[py] Add LocalWebDriver base class by @cgoldberg in #16730

Fix bug in FileHandler: it always failed on MacOS by @asolntsev in #16771

[java] add missing bazel artifacts by @titusfortner in #16773

[bazel+js]: Wrap grid-ui tests with bazel by @shs96c in #16758

Add missing build file by @shs96c in #16779

[bazel] Flag fixes for the RBE by @shs96c in #16785

[bazel+js]: Avoid shadowing directory with test name by @shs96c in #16784

[py] Add type hints for WebElement.find_element(s) by @pixelsapphire in #16772

[build] add explicit permissions to github workflows by @titusfortner in #16774

[dotnet] Hide driver service window by default by @nvborisenko in #16782

[rb] Fix steep issues by @aguspe in #16752

[py][build]: consolidate Python CI tests by @titusfortner in #16766

[dotnet] [bidi] Fix context aware event handlers by @nvborisenko in #16787

[java] #16753 workaround for JDK bug JDK-8228970 by @asolntsev in #16793

[java][BiDi] implement emulation.setNetworkConditions by @Delta456 in #16794

[java] [refactor] replace most of Guava collections by Java built-in collections by @asolntsev in #16776

[build] fix issue trying to guard actions run on forks by @titusfortner in #16800

[py] Add/fix type hints for find_element/find_elements by @cgoldberg in #16786

[ci] Use macos-latest instead of macos-13 in Rust workflow by @bonigarcia in #16803

[py][bidi]: improve tests to use local no-proxy server by @navin772 in #16747

[py][bidi]: add emulation command set_network_conditions by @navin772 in #16702

[dotnet][java][py][rb][rust] Only use External Cache for GitHub Actions by @titusfortner in #16788

[py] Add new ruff lint rules, fix violations and type annotations by @cgoldberg in #16789

[java] Be more tolerant to remote responses by @asolntsev in #16797

[py] pin python versions to specific patches by @titusfortner in #16795

[java] Fix asserts for maps and sets by @asolntsev in #16808

[js] fix JS tests on RBE by @titusfortner in #16777

[py] Remove deprecated FirefoxBinary class by @cgoldberg in #16811

[build] limit what check job pulls in by @titusfortner in #16815

[rust] fix support for Edge beta versions on Windows by @titusfortner in #16806

[py] Bump versions and remove unnecessary dev/test dependencies by @cgoldberg in #16820

remove docker deploy code by @titusfortner in #16822

[py] Fix type annotations, make docstrings consistent, centralize dependencies by @cgoldberg in #16821

[java] several packages marks jspecify nullmarked by @iampopovich in #16802

Update copyright to 2026 by @cgoldberg in #16830

[rust] ignore force download for Safari by @titusfortner in #16825

[dotnet] [bidi] Properly return shared buffer when disposing websocket by @nvborisenko in #16804

[java] fix NPE in FirefoxOptions by @asolntsev in #16833

[py] Fix remaining mypy errors and enable CI for type checking by @cgoldberg in #16837

[java] Mark obsolete variables deprecated in DriverCommand and W3CHttpCommandCodec by @iampopovich in #16013

[java] remove usages of Guava collections (sets and maps) by @asolntsev in #16835

[java] simplify several statements with isEmpty function call by @iampopovich in #16836

[java] JSpecify annotations for org.openqa.selenium.json by @mk868 in #16799

[java][rb][py][dotnet][js] use SE_DEBUG to enable debugging by @titusfortner in #16816

[java] Allow downloading files from old Grid server by @asolntsev in #16839

[build] fix lint problems automatically by @titusfortner in #16780

[java] Speed up tests, improve test logging and build script by @asolntsev in #16843

[rb] ensure the grid is properly restarted in tests when there is a problem by @titusfortner in #16842

[build] get chrome-driver tests passing on RBE by @titusfortner in #16807

[Java] add lint job by @titusfortner in #16846

[java] rework downloading files from Grid by @asolntsev in #16844

[java] configurable timeout for BiDi commands by @asolntsev in #16796

[java] Unify error message format for all Expected Conditions & add tests by @asolntsev in #16831

[java][py][rb][js][dotnet] rerun failing tests when requested by @titusfortner in #16840

[build] remove ruby tests from skipped tests files by @titusfortner in #16859

[node] Add asMap function to Header class and corresponding tests by @iampopovich in #16832

[java] Fix flaky tests by @asolntsev in #16862

[java] fixes for running on windows by @titusfortner in #16852

[js]: Get the chrome-driver tests passing by @shs96c in #16856

[js] Migrate javascript/atoms tests from Closure to QUnit by @shs96c in #16855

[rb] should not need long client timeout in tests by @titusfortner in #16847

[py] Reduce traceback output on test failures by @cgoldberg in #16854

[py] Bump minimum dependency versions because of CVE by @cgoldberg in #16867

[js] Delete tests and files which are not run any more by @shs96c in #16871

Migrate remaining Google Closure jsunit tests to qunit by @shs96c in #16870

[py] improve how tests are run against the grid server by @titusfortner in #16851

Java chrome beta by @titusfortner in #16860

add readable toString() to org.openqa.selenium.remote.Browser by @asolntsev in #16873

[java] restore ClientConfig constructor used by Appium (for backward compatibility) by @asolntsev in #16874

Remove outdated CodeTour files by @cgoldberg in #16872

[dotnet] get tests working on windows with bazel by @titusfortner in #16853

[py] Add type annotations to bidi network module by @mzyndul in #16875

[dotnet] Stabilize ShouldTimeoutIfAPageTakesTooLongToRefresh test by @nvborisenko in #16880

[dotnet] [bidi] Context aware network collector by @nvborisenko in #16866

[dotnet] [bidi] Rent and return buffer to shared pool per remote message by @nvborisenko in #16838

[build][rb] remove unnecessary log output from windows runs by @titusfortner in #16876

[build] save bazel cache to GitHub only from trunk by @titusfortner in
Note truncated.

20112013201520172019202120232025

20112026

One column per quarter.

Additional notes

[bidi] Support SetScreenSettingsOverrideAsync method in Emulation module (#16704)
[bidi] Added missing Script.RemoteReference LocaclValue type (#16717)
Standardize IEquatable<T> implementations across types overriding Equals (#16665)
Fix nullability warnings in WebDriver (#16662)
Hide driver service window by default (#16782)
[bidi] Fix context aware event handlers (#16787)
[bidi] Properly return shared buffer when disposing websocket (#16804)
use SE_DEBUG to enable debugging (#16816)
[bidi] Context aware network collector (#16866)
[bidi] Rent and return buffer to shared pool per remote message (#16838)
[bidi] Allow consumer to combine input actions via identifier (#16885)
[bidi] Expose New session command (#16907)
[bidi] FileDialogOpened event in Input module (#16934)
[bidi] Expose Input module in root BiDi class (#16940)

Selenium.Support

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