Firefox 94 for developers

This article provides information about the changes in Firefox 94 that will affect developers. Firefox 94 was released on November 2nd, 2021

Changes for web developers

HTML

No notable changes

CSS

No notable changes

JavaScript

No notable changes

APIs

DOM

WebDriver conformance (Marionette)

  • WebDriver:GetWindowHandle and WebDriver:GetWindowHandles now return handles for browser windows instead of tabs, when chrome scope is enabled (bug 1729291)

Changes for add-on developers

Older versions