[Mozilla Announce] Firefox ESR 140.12 released

"'Ryan VanderMeulen' via [email protected]" <[email protected]> Tue, 16 Jun 2026 10:48:04 -0400
Newsgroups gmane.comp.mozilla.announce
Message-ID <CAPebk9et+u909r5f_Ucj_VV80NUb1UhbzLYodgwDFJ-DY=ALKA@mail.gmail.com>
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We are pleased to announce that the Firefox ESR 140.12 release is now
available for download at https://www.firefox.com/download/all/desktop-esr/.

Release notes for Firefox 140.12.0esr are available at
https://www.firefox.com/firefox/140.12.0/releasenotes/.
Associated security advisories are posted at:
https://www.mozilla.org/security/advisories/mfsa2026-58/

Firefox ESR 115.37.0 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 115.37.0esr are available at
https://www.firefox.com/firefox/115.37.0/releasenotes/.
Associated security advisories are posted at:
https://www.mozilla.org/security/advisories/mfsa2026-59/

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,
Ryan VanderMeulen
Firefox Release Manager

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<div dir=3D"ltr"><div dir=3D"ltr">We are pleased to announce that the Firef=
ox ESR 140.12 release is now available for download at <a href=3D"https://w=
ww.firefox.com/download/all/desktop-esr/" target=3D"_blank">https://www.fir=
efox.com/download/all/desktop-esr/</a>.<br><br>Release notes for Firefox 14=
0.12.0esr are available at<br><a href=3D"https://www.firefox.com/firefox/14=
0.12.0/releasenotes/" target=3D"_blank">https://www.firefox.com/firefox/140=
.12.0/releasenotes/</a>.<br>Associated security advisories are posted at:<b=
r><a href=3D"https://www.mozilla.org/security/advisories/mfsa2026-58/" targ=
et=3D"_blank">https://www.mozilla.org/security/advisories/mfsa2026-58/</a><=
br><br>Firefox ESR 115.37.0 is also now available for Windows 7-8.1 and mac=
OS 10.12-10.14 users per the previously-announced window of extended securi=
ty support for that release.<br><br>Release notes for Firefox 115.37.0esr a=
re available at<br><a href=3D"https://www.firefox.com/firefox/115.37.0/rele=
asenotes/" target=3D"_blank">https://www.firefox.com/firefox/115.37.0/relea=
senotes/</a>.<br>Associated security advisories are posted at:<br><a href=
=3D"https://www.mozilla.org/security/advisories/mfsa2026-59/" target=3D"_bl=
ank">https://www.mozilla.org/security/advisories/mfsa2026-59/</a><br><br>As=
 always, we recommend that users keep up to date with the newest version of=
 Firefox ESR for the latest stability and security fixes.<br><br>Thank you,=
<br>Ryan VanderMeulen<br>Firefox Release Manager</div>
</div>

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