Firefox 110 for developers

Removals

• Container queries and container query length units are now supported by default. For more information on these queries and the related units of length, see the CSS Container Queries documentation (bug 1809720).

Removals

• Serialization of native Error types now includes the stack property in workers when using Worker.postMessage() and structuredClone(). With this addition, cloning native error stacks now works for all methods that use the structured clone algorithm, in both the main thread and workers. (See bug 1774866 for more details.)

Removals

Removals

Removals

Removals

• The midi permission of the Permission API is now supported. This allows the permission status for using the Web MIDI API to be queried using navigator.permissions.query() (bug 1772166).

DOM

• The contentvisibilityautostatechanged event and associated ContentVisibilityAutoStateChangedEvent interface are now supported. The event can be used by application code to stop processes related to rendering the element when the user agent is skipping its contents. (bug 1798485).

Media, WebRTC, and Web Audio

Removals

Removals

WebDriver BiDi

Marionette

• The defaultZoomFactor property of tabs.ZoomSettings now returns the value of the default zoom factor setting (bug 1772166)