Firefox 134 for developers

Removals

Removals

• Support for the RegExp.escape() static method that can be used to escape any potential regex syntax characters in a string, returning a new string that can be safely used as a literal pattern for the RegExp() constructor. (Firefox bug 1918235).
• The Promise.try() convenience method is now supported. The method takes a callback of any kind (a function that returns or throws, synchronously or asynchronously) and wraps its result in a Promise. This allows you to use promise semantics (.then(), .catch()) to handle the result from any kind of method. (Firefox bug 1917879 and Firefox bug 1905364).
• Intl.DurationFormat is supported, enabling locale-sensitive formatting of durations. (Firefox bug 1648139).

Removals

Removals

Removals

Removals

• The PushManager.supportedContentEncodings static method is now supported for getting the allowed algorithms for encrypting the payload of a push message. (Firefox bug 1497430).
• AudioParam.value now allows the value to be set even during the time that an automated event is scheduled: previously the operation would silently be ignored at those times. (Firefox bug 1308435).

DOM

Media, WebRTC, and Web Audio

Removals

Removals

General

WebDriver BiDi

Marionette

These features are newly shipped in Firefox 134 but are disabled by default. To experiment with them, search for the appropriate preference on the about:config page and set it to true. You can find more such features on the Experimental features page.

• autocorrect: dom.forms.autocorrect. The HTML autocorrect attribute and HTMLElement.autocorrect property allow autocompletion in editable text elements, including: most kinds of text <input> elements, <textarea> elements, and elements that have the contenteditable attribute set (Firefox bug 1725806).