CSS

Resolved Issues

• Fixed: Dropped layout containment from container-type. (284730@main) (132549134)
• Fixed CSS nested declarations inside a @scope to behave like :where(:scope). (284635@main) (136856371)

Editing

New Features

• Implemented ClipboardItem.support() which gives the page author the ability to understand which formats are supported during Clipboard operations. It also now returns a TypeError for a new ClipboardItem() with an empty Array. (284593@main) (136008522)

Resolved Issues

• Fixed missing SecureContext in the ClipboardItem interface. (284511@main) (137197266)

JavaScript

New Features

• Completed the Iterator Helpers proposal by implementing map(), filter(), take(), drop(), and flatMap() methods. (284597@main) (103171739)

Resolved Issues

• Fixed Iterator.prototype.reduce() not properly forwarding the return() call to the underlying iterator. (284648@main) (137181340)

Media

New Features

• Added support for the Image Capture API. (284447@main) (136860809)

Rendering

Resolved Issues

• Fixed non-separable blend modes in mix-blend-mode to workon elements in compositing layers. (284170@main) (49387130)
• Fixed repeating background-image sized to the content-box failing to fill the viewport in an iframe. (284165@main) (133952319)
• Fixed floats not clearing in the WordPress Classic Editor sidebar layout. (284247@main) (136362683)

SVG

Resolved Issues

• Fixed: Updated getTotalLength() with the web specification to throw an exception when non-renderable and the path is empty. (284311@main) (136719548)

Tables

Resolved Issues

• Fixed Table Root to also account for fill-available in a fixed table layout. (284712@main) (137297914)

Web Extensions

New Features

• Added support for getKeys() in storage areas. (284602@main) (136595295)
• Added support for i18n.getSystemUILanguage and i18n.getPreferredSystemLanguages. (284637@main) (136929657)

WebDriver

Resolved Issues

• Fixed a crash that could occur when simulating drag events with the right mouse button. (284577@main) (137068514)

WebRTC

New Features

• Added support for enumerated visible network interfaces. (284687@main) (137067672)

Resolved Issues

• Fixed MediaSession.setMicrophoneActive(true) prompting repeatedly if the microphone was muted by the user-agent once. (284399@main) (135941062)
• FixedsetCameraActive to not unmute microphone if the user-agent previously muted both camera and microphone. (284069@main) (136221456)
• Fixed AirPods unmuting to not unmute the camera if website muted the camera. (284514@main) (137065964)