Firefox 70 for developers

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This article provides information about the changes in Firefox 70 that will affect developers. Firefox 70 is the current Nightly version of Firefox, and will ship on October 22, 2019.

Changes for web developers

Developer tools

  • An information icon will be displayed next CSS properties that do not have an effect on the current element in the Rules pane of the Page Inspector (bug 1306054).

Removals

HTML

No changes.

 Removals

CSS

Removals

SVG

No changes.

Removals

JavaScript

Removals

APIs

New APIs

DOM

DOM events

Service workers

Media, Web Audio, and WebRTC

Canvas and WebGL

Removals

Security

No changes.

Removals

Plugins

No changes.

Removals

Other

No changes.

Removals

Changes for add-on developers

API changes

No changes.

Removals

Manifest changes

No changes.

Removals

See also

Older versions