Firefox 97 for developers

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This article provides information about the changes in Firefox 97 that will affect developers. Firefox 97 is the current Beta version of Firefox, and will ship on February 8, 2022.

Changes for web developers

Developer Tools

HTML

Removals

CSS

Removals

JavaScript

Removals

SVG

  • The SVG d attribute, used to define a path to be drawn, can now be used as a property in CSS. It accepts the values path() or none. (See bug 1744599 for details.)

Removals

  • A number of SVGPathSeg APIs are now disabled by default behind a preference, and are expected to be removed in future revisions. This includes: SVGPathSegList, SVGPathElement.getPathSegAtLength(), SVGAnimatedPathData. (See bug 1388931 for more details.)

HTTP

Removals

Security

Removals

APIs

DOM

Media, WebRTC, and Web Audio

Removals

WebAssembly

Removals

WebDriver conformance (Marionette)

  • Marionette:Quit accepts a new boolean parameter, safeMode, to restart Firefox in safe mode (bug 1144075).

Removals

Changes for add-on developers

Removals

Other

Older versions