Firefox 150 release notes for enterprise admins

Find a version

All versionsAll versions forward

Firefox 150

Released 21 April 2026.

These changes apply to Firefox 150 and Firefox ESR 140.10.0 unless explicitly stated. Firefox ESR 140 is the current ESR.

New in Firefox 150

• RelaunchRequired: Require Firefox to be relaunched within a given period and notify the user of the upcoming relaunch. Does not apply to the ESR.
• SitePolicies: Fine-grained control over policies for specific sites. Does not apply to the ESR.

Changes

• Policy documentation has officially moved to https://firefox-admin-docs.mozilla.org/.

Fixes

• Homepage: The policy was not working correctly in Firefox 149. Fixed in Firefox 149.0.2. Does not apply to the ESR.

Notes

• Firefox ESR 115 support for Windows 7/8 and macOS 10.12, 10.13 and 10.14 is extended to August 2026.