Firefox 103 for developers

This article provides information about the changes in Firefox 103 that will affect developers. Firefox 103 is the current Beta version of Firefox and will ship on July 26, 2022.

Changes for web developers

Developer Tools

HTML

Removals

CSS

Removals

JavaScript

Removals

HTTP

Removals

Security

Removals

APIs

DOM

Media, WebRTC, and Web Audio

Removals

WebAssembly

Removals

WebDriver conformance (WebDriver BiDi, Marionette)

Removals

Changes for add-on developers

Removals

Other

Older versions