Firefox 118 for developers

This article provides information about the changes in Firefox 118 that affect developers. Firefox 118 is the current Beta version of Firefox and ships on September 26, 2023.

Changes for web developers

Developer Tools

HTML

  • The <search> element is now supported. The <search> element is a group element that serves to contain all the elements used in a search or filtering operation (Firefox bug 1824121).

MathML

  • The mathml.legacy_maction_and_semantics_implementations.disabled preference is now removed, which means that the <semantics> and <maction> elements only render the first child element by default (Firefox bug 1788223).

Removals

CSS

Removals

JavaScript

Removals

SVG

Removals

HTTP

Removals

Security

Removals

APIs

DOM

Media, WebRTC, and Web Audio

Removals

WebAssembly

Removals

WebDriver conformance (WebDriver BiDi, Marionette)

WebDriver BiDi

Marionette

Changes for add-on developers

Removals

Other

Older versions