- Refactored Selenium Grid by removing RC server dependencies, decoupling node registration, and introducing a pure WebDriver v3 grid server;
- Added new APIs such as a “timeouts” command for Safari, WebElement.takeScreenshot() in JS bindings, and W3C‑compatible cookie serialization for Marionette;
- Removed obsolete components including the pre‑built SafariDriver extension, the unused JsonKey abstraction, and outdated driver timeout endpoints in .NET.