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Firefox 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.

121.0.1 Firefox Release

January 9, 2024

Version 121.0.1, first offered to Release channel users on January 9, 2024

Fixed

  • Fixed unexpected line wrapping in some CJK contexts caused by changes in ideographic space handling. (Bug 1870973)

  • Fixed a hang when loading sites containing column-based layouts under some circumstances. (Bug 1867784)

  • Fixed missing rounded corners for videos playing over another video. (Bug 1869994)

  • Fixed Firefox not closing properly and other applications being unable to use a USB security key after being previously used during a Firefox session. (Bug 1863135)

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