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Firefox Nightly
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.

103.0a1 Firefox Nightly

May 30, 2022

Version 103.0a1, first offered to Nightly channel users on May 30, 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.


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

    Bug 1670885
  • Required fields are now highlighted in PDF forms.

    Bug 1724918
  • Improved performance on high-refresh rate monitors (120Hz+)

    Bug 1771718


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

    Bug 359303
  • Fixed WebGL performance issues on NVIDIA binary drivers via DMA-Buf on Linux.

    Bug 1735929


  • 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.

    Bug 1766687
  • Hardware video decoding is enabled on Linux by default. It's used on Intel/AMD platform when VA-API is available. (Linux Nightly only)

    Bug 1752494

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