Web Inspector

• Added editing capabilities for font variation axes in Fonts sidebar panel ([email protected])
• Added showing parent style rules for nested style rules in Styles sidebar ([email protected])

CSS

• Enabled CSS Nesting ([email protected], [email protected])
• Enabled CSS relative color syntax ([email protected])
• Enabled CSS margin-trim property ([email protected])
• Implemented margin-trim for flexbox ([email protected])
• Implemented margin-trim for grid containers ([email protected])
• Fixed CSS animations to participate in the cascade ([email protected])

Scrolling

• Fixed page up and page down scrolling feeling slow ([email protected])

Gamepad API

• Added support for Gamepad.vibrationActuator ([email protected])
• Added plumbing for Gamepad.vibrationActuator API ([email protected], [email protected])
• Made Gamepad.vibrationActuator work with the GameController framework ([email protected])

Media

• Limited DOMAudioSession to third-party iframes that have microphone access ([email protected])

Web API

• Enabled declarative Shadow DOM by default ([email protected], [email protected])
• Enabled form-associated custom elements with ElementInternals by default ([email protected], [email protected])
• Implemented non-autofill credential type for the autocomplete attribute ([email protected])
• Changed <button> and <select> elements with a readonly attribute to not be barred from constraint validation ([email protected])
• Fixed painting an in-process VideoFrame in a remotely-backed canvas does not work ([email protected])
• Lowered per-process WebSocket connection limits ([email protected])
• Made all FileSystemSyncAccessHandle methods sync ([email protected])
• Moved oncopy, oncut, and onpaste to GlobalEventHandlers ([email protected])
• Removed HTMLFrameElement.width and HTMLFrameElement.height ([email protected])
• Removed HTMLHeadElement.profile ([email protected])
• Removed HTMLPreElement.wrap IDL attribute ([email protected])

Accessibility

• Enabled default ARIA for custom elements ([email protected])
• Fixed aria-activedescendant to work with a standard “listbox” pattern ([email protected])
• Fixed nested role="presentation" elements break role="tree" behavior ([email protected])