Firefox 70 for developers

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 icon will be displayed next to invalid or unsupported CSS rules in the Rules pane of the Page Inspector (баг 1306054).

Removals

HTML

No changes.

 Removals

CSS

• [fill-stroke] [filter-effects] [css-color] percentage opacity. баг 1562086
• [css-grid] grid-auto-columns/rows should accept multiple track-size values. баг 1339672
• [css-text-decor-4] Implement text-decoration-skip-ink. баг 1411922
• [css-display-3] Implement multi-keyword display values. (баг 1038294, баг 1105868 and баг 1557825)
• [filter-effects-2] Implement backdrop-filter. баг 1178765

Removals

SVG

No changes.

Removals

JavaScript

• Add support for numeric separators. баг 1435818

Removals

APIs

New APIs

DOM

• Add DOMMatrix, DOMPoint, etc. support in web workers (баг 1420580).

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

• Site compatibility for Firefox 70

Older versions