Firefox 115 for developers

This article provides information about the changes in Firefox 115 that affect developers. Firefox 115 is the current Nightly version of Firefox and ships on July 04, 2023.

Changes for web developers

Developer Tools

HTML

Removals

CSS

Removals

JavaScript

Removals

SVG

Removals

HTTP

Removals

Security

Removals

APIs

DOM

Media, WebRTC, and Web Audio

Removals

WebAssembly

Removals

WebDriver conformance (WebDriver BiDi, Marionette)

WebDriver BiDi

Marionette

Changes for add-on developers

To support its deprecation from Manifest V3 extensions, manifest key property browser_style defaults to false in options_ui and sidebar_action for Manifest V3 extensions (Firefox bug 1830710). See Manifest v3 migration for information about transitioning from browser_style in Manifest V3 extensions.
Adds commands.onChanged which enables web extensions to listen for changes to command shortcuts (Firefox bug 1801531)

Removals

Other

Older versions