Firefox Beta and Developer Edition
Release Notes

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.

Firefox Beta — English (US)

Your system may not meet the requirements for Firefox, but you can try one of these versions:

Firefox Beta — English (US)

Firefox Beta is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR 64-bit

Download Firefox ESR 32-bit

Download a different build

Firefox Beta is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR

Firefox Privacy Notice

Version 109.0beta, first offered to Beta channel users on December 13, 2022

Firefox Beta gets updated 3 times a week and as a consequence, the release notes for the Beta channel are updated continuously to reflect features that have reached sufficient maturity to benefit from community feedback and bug reports.

Warning: Features listed here may or may not make a final release of Firefox.

In addition to these release notes, you can follow ongoing development via our @FirefoxBeta Twitter account.

Manifest Version 3 (MV3) is now enabled by default (MV2 remains enabled/supported). This major update also ushers an exciting user interface change in the form of the new Unified Extensions button.
Firefox builds in Spanish from Spain (es-ES) and Spanish from Argentina (es-AR) now come with a built-in dictionary that can be used with the Firefox spellchecker.

On macOS, Ctrl or Cmd + trackpad or mouse wheel now scrolls the page instead of zooming. This avoids accidental zooming and matches Safari's and Chrome's behavior. If you would like to restore the previous zooming behavior, set the mousewheel.with_control.action and mousewheel.with_meta.action prefs to "3" in about:config.