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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.

103.0beta Firefox Beta

June 28, 2022

Version 103.0beta, first offered to Beta channel users on June 28, 2022

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.


  • Improved responsiveness on macOS during periods of high CPU load, by switching to a modern lock API.

  • Required fields are now highlighted in PDF forms.

  • Improved performance on high-refresh rate monitors (120Hz+)

  • Subtitles and captions for Picture-in-Picture are now available at Funimation, Dailymotion, Tubi, Hotstar, and SonyLIV.

  • Buttons in the Tabs toolbar can now be reached with Tab, Shift+Tab, and Arrow keys. Please see this article for additional details.

  • Windows' "Make text bigger" accessibility setting now affects all the UI and content pages, rather than just affecting system font sizes.


  • Non-breaking spaces are now preserved when copying text from a form control.

  • Fixed WebGL performance issues on NVIDIA binary drivers via DMA-Buf on Linux.


  • Removed configuration option to allow SHA-1 signatures in certificates. SHA-1 signatures in certificates, long since determined to no longer be secure enough, are now not supported.

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