Firefox 133 for developers

Removals

Removals

• Support for Uint8Array methods to ease conversions between base64- and hex-encoded strings and byte arrays. (Firefox bug 1917885 and Firefox bug 1862220).

  The new methods include:

  • Uint8Array.fromBase64() and Uint8Array.fromHex() static methods for constructing a new Uint8Array object from a base64- and hex-encoded string, respectively.
  • Uint8Array.prototype.setFromBase64(), and Uint8Array.prototype.setFromHex() instance methods for populating an existing Uint8Array object with bytes from a base64- or hex-encoded string.
  • Uint8Array.prototype.toBase64() and Uint8Array.prototype.toHex() instance methods, which return a base64- and hex- encoded string from the data in a Uint8Array object.

Removals

Removals

Removals

Removals

• The WorkerNavigator.permissions property is now supported, allowing the Permissions API to be used in workers as well as the main window thread. (Firefox bug 1193373).
• The EventSource interface to handle server-sent events is now supported in service workers. (Firefox bug 1681218).
• The ImageDecoder, ImageTrackList, and ImageTrack interfaces of the WebCodecs API are now supported, enabling the decoding images from the main and worker threads. (Firefox bug 1923755).

DOM

Media, WebRTC, and Web Audio

Removals

Removals

General

WebDriver BiDi

Marionette

These features are newly shipped in Firefox 133 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.