Firefox ESR 140.3.0 released
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Ryan VanderMeulen
Sep 16, 2025, 11:23:52 AM (10 days ago) Sep 16
to anno...@mozilla.org, Mozilla.org
We are pleased to announce that the Firefox ESR 140.3.0 release is now available for download at https://www.mozilla.org/firefox/organizations/all/
As always, we recommend that users keep up to date with the newest version of Firefox ESR for the latest stability and security fixes.
As was previously announced, the release of ESR 140.3 also marks the official end of support for ESR 128.x. ESR128 users on all supported operating systems will be upgraded to the 140.3.0 release shipping from the ESR140 branch.
Release notes for Firefox 140.3.0esr are available at:
https://www.firefox.com/firefox/140.3.0/releasenotes/
Release notes for Firefox 115.28.0esr are available at:
https://www.firefox.com/firefox/115.28.0/releasenotes/
Thank you,
Ryan VanderMeulen
Firefox Release Manager
As always, we recommend that users keep up to date with the newest version of Firefox ESR for the latest stability and security fixes.
As was previously announced, the release of ESR 140.3 also marks the official end of support for ESR 128.x. ESR128 users on all supported operating systems will be upgraded to the 140.3.0 release shipping from the ESR140 branch.
Release notes for Firefox 140.3.0esr are available at:
https://www.firefox.com/firefox/140.3.0/releasenotes/
Firefox ESR 115.28.0 is also now available for Windows 7-8.1 and macOS 10.12-10.14 users. Note that support was recently extended through March of 2026.
https://www.firefox.com/firefox/115.28.0/releasenotes/
Thank you,
Ryan VanderMeulen
Firefox Release Manager
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