---
title: Firefox 70 for developers
slug: Mozilla/Firefox/Releases/70
translation_of: Mozilla/Firefox/Releases/70
original_slug: Mozilla/Firefox/Versions/70
---
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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
- 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
- [fill-stroke] [filter-effects] [css-color] percentage opacity. {{Bug(1562086)}}
- [css-grid] grid-auto-columns/rows should accept multiple track-size values. {{Bug(1339672)}}
- [css-text-decor-4] Implement text-decoration-skip-ink. {{Bug(1411922)}}
- [css-display-3] Implement multi-keyword {{CSSxRef("display")}} values. ({{Bug(1038294)}}, {{Bug(1105868)}} and {{Bug(1557825)}})
Removals
SVG
No changes.
Removals
JavaScript
- Add support for numeric separators. {{Bug(1435818)}}
Removals
APIs
New APIs
DOM
- Add {{DOMxRef("DOMMatrix")}}, {{DOMxRef("DOMPoint")}}, etc. support in web workers ({{bug(1420580)}}).
DOM events
Service workers
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
{{Firefox_for_developers(69)}}