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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.

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109.0a1 Firefox Nightly

November 14, 2022

Version 109.0a1, first offered to Nightly channel users on November 14, 2022

Firefox Nightly gets updated every day and as a consequence, the release notes for the Nightly 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 on our @FirefoxNightly Twitter account as well as read our Nightly Blog.

Changed

  • 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.

    Bug 1781960

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

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

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

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All Firefox Nightly downloads