Firefox ESR 140.4.0 released
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Donal Meehan
Oct 14, 2025, 10:28:41 AM (9 days ago) Oct 14
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We are pleased to announce that the Firefox ESR 140.4.0 release is now available for download at https://www.firefox.com/download/all/desktop-esr/.
Release notes for Firefox 140.4.0esr are available at
https://www.firefox.com/firefox/140.4.0/releasenotes/.
Firefox ESR 115.29.0 is also now available for Windows 7-8.1 and macOS 10.12-10.14 users per the previously-announced window of extended security support for that release.
Release notes for Firefox 115.29.0esr are available at
https://www.firefox.com/firefox/115.29.0/releasenotes/.
As always, we recommend that users keep up to date with the newest version of Firefox ESR for the latest stability and security fixes.
Thank you,
Release notes for Firefox 140.4.0esr are available at
https://www.firefox.com/firefox/140.4.0/releasenotes/.
Firefox ESR 115.29.0 is also now available for Windows 7-8.1 and macOS 10.12-10.14 users per the previously-announced window of extended security support for that release.
Release notes for Firefox 115.29.0esr are available at
https://www.firefox.com/firefox/115.29.0/releasenotes/.
As always, we recommend that users keep up to date with the newest version of Firefox ESR for the latest stability and security fixes.
Thank you,
Donal Meehan,
Firefox Release Manager
Firefox Release Manager
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