Firefox ESR 115.27.0, ESR 128.14, and ESR 140.2.0 released

[Dianna Smith]

We are pleased to announce the release of three new Firefox ESR versions today: 115.27.0, 128.14.0, and 140.2.0.

All are available for download at https://www.mozilla.org/firefox/organizations/all/.

Release notes for Firefox 128.14.0esr are available at https://www.firefox.com/firefox/128.14.0/releasenotes/.

Firefox ESR 115.27.0 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 115.27.0esr are available at https://www.firefox.com/firefox/115.27.0/releasenotes/.

Firefox ESR 140.2.0 is the third release from the ESR140 branch, which is slated to replace ESR128 on September 16, 2025. 

We recommend that organizations use this opportunity to test the new major release in their environment and provide any feedback ahead of the ESR128 End Of Life.

Release notes for Firefox 140.2.0esr are available at https://www.firefox.com/firefox/140.2.0/releasenotes/

Thank you,

Dianna Smith
Firefox Release Manager