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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.

124.0beta Firefox Beta

February 20, 2024

Version 124.0beta, first offered to Beta channel users on February 20, 2024

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.


  • Firefox for Android now supports HTML drag and drop API when using a mouse. Also, it accepts plain text or HTML text by the drop operation from external applications.

  • Caret browsing mode now also works in the PDF viewer. (Learn more)

  • Firefox on Mac now uses the macOS fullscreen API for all types of fullscreen windows. This should better match the expected macOS user experience for fullscreen spaces, menubar and the Dock. Users who would like to return to the previous behavior should set the deprecated full-screen-api.macos-native-full-screen pref to false.

  • Firefox for Android now has Pull to Refresh enabled by default. We've made it more robust than before!

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