We are releasing a Firefox ESR
128.8.
1 security update today.
As
always, we recommend that users keep up to date with the newest version
of Firefox ESR for the latest stability and security fixes.
This release addresses a potential security vulnerability and it is recommended to install this update as soon as possible.
Firefox ESR 115.21.1 is also available for Windows 7-8.1 and macOS 10.12-10.14.
The security advisory for these releases are available at:
https://www.mozilla.org/security/advisories/mfsa2025-19/