Firefox 111 release notes for developers

Changes for web developers

HTML

• The autocapitalize global attribute is now supported by default. The default value for the attribute is none, so no capitalization occurs (Firefox bug 1692007).
• The translate global attribute is now supported (Firefox bug 1418449).

CSS

• CSS color functions color(), lab(), lch(), oklab(), and oklch() are now supported. These features are disabled by default and can be enabled by setting the preference layout.css.more_color_4.enabled to true. For more information, see the CSS color value documentation (Firefox bug 1352757 and Firefox bug 1128204).

JavaScript

No notable changes.

SVG

• The context-stroke and context-fill values are now supported inside <marker> elements. For more information on using these values with fill and stroke properties, see the <marker> documentation (Firefox bug 752638).

HTTP

• The HTTP Authorization header is removed from cross origin redirects. See Firefox bug 1802086 for more details.

APIs

• Origin private file system (OPFS) is now supported when using the File System API. The data in this file system is origin-specific: permission prompts are not required to access files, and clearing data for the site/origin deletes the storage. The OPFS is accessed with the StorageManager.getDirectory() method, by calling navigator.storage.getDirectory() in a worker or the main thread. See Firefox bug 1785123 for more details.
• The HTTP Authorization header is removed from fetch() and XMLHttpRequest requests that are redirected cross-origin (fetch() headers may be added by developers using the option.headers argument). See Firefox bug 1802086 for more details.
• The none value of the options.imageOrientation parameter passed to Window.createImageBitmap() and WorkerGlobalScope.createImageBitmap() has been renamed to from-image. This is to better match the meaning of the equivalent CSS image-orientation property. (Firefox bug 1809740).

DOM

• The FormData constructor now accepts a second optional submitter parameter to specify a submit button. If the button has a name or is an image button, it will contribute to the form data set. This makes it possible to create a FormData object with the same data set as a vanilla form submission triggered by the button. See Firefox bug 1812696 for more details.

Media, WebRTC, and Web Audio

• RTCInboundRtpStreamStats.trackIdentifier is now supported. This allows developers to associate inbound-rtp statistics with a particular track when using RTCPeerConnection.getStats(). (For more information see Firefox bug 1804676.)

WebDriver conformance (WebDriver BiDi, Marionette)

WebDriver BiDi

• Changed the behaviors for handling stale elements checks based on recently updated WebDriver classic specification. See Firefox bug 1808894 for more details.

Marionette

• Fixed an issue where returning a ShadowRoot from WebDriver:ExecuteScript causes a cyclic object value error. See Firefox bug 1764594 for more details.

Changes for add-on developers

• matchDiacritics has been added to the Find.find API. This option enables searches to distinguish between accented letters and their base letters. For example, when set to true, searching for "résumé" does not find a match for "resume" Firefox bug 1680606.
• search.query has been added, providing search API compatibility with Chromium-based browsers Firefox bug 1804357.
• The disposition property has been added to search.search, enabling results to be displayed in a new tab or window Firefox bug 1811274.