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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.

138.0.1 Firefox Release

May 1, 2025

Version 138.0.1, first offered to Release channel users on May 1, 2025

Fixed

  • Fixed an issue which caused a blank page to be shown for Home and New Tab pages for some users. (Bug 1963537)

  • Added a workaround for a bug in outlook.office.com/outlook.live.com where attachment filenames are incorrectly prefixed with UTF-8 when saved. (Bug 1961710)

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