Firefox 80 for developers

This article provides information about the changes in Firefox 80 that will affect developers. Firefox 80 is the current Beta version of Firefox, and will ship on August 25, 2020.

Changes for web developers

Developer Tools

  • You can now block and unblock network requests using the :block and :unblock helper commands in the Web Console. (Refer to bug 1546394)
  • When adding a class to an element in the Page Inspector's Rules pane, existing classes are suggested with autocomplete. (Refer to bug 1492797)
  • When the Debugger breaks on an exception, the tooltip in the source pane now shows disclosure triangle that reveals a stack trace. (Refer to bug 1643633)
  • In the Network Monitor, a turtle icon is shown for "slow" requests that exceed a configurable threshhold for the waiting time. (Refer to bug 1648373)

HTML

No changes

Removals

CSS

No changes

Removals

JavaScript

No changes

Removals

HTTP

No changes

Removals

APIs

No changes

DOM

Media, WebRTC, and Web Audio

Removals

WebAssembly

No changes

Removals

Changes for add-on developers

No changes

Removals

See also

Older versions