Changes to planned ESR 115 end-of-life

[Ryan VanderMeulen]

Hello,

As was announced last year, mainline support for Windows 7-8.1 and macOS 10.12-10.14 was declared end-of-life and users on those platforms were migrated to the ESR 115 branch in order to continue receiving important security and quality fixes for at least another year.

At the time that decision was made, a commitment was also made to review the current usage numbers for those migrated platforms closer to the planned end-of-life of the ESR 115 branch in order to assess whether any changes in plan were necessary.

After reviewing that usage data, it was decided that we will continue to support the ESR 115 branch only for those previously-mentioned platforms for another 6 months. Users on newer platforms will still be migrated to the ESR 128 branch next month as originally planned. In early 2025, we will review the current usage data again and decide at that time whether further extension is warranted or not. We have updated whattrainisitnow.com to reflect this extension.

We recognize that ESR 115 is an increasingly difficult target for patch backports and as such will be limiting the scope of approvals to only critical security and quality fixes.

Thank you,

Ryan VanderMeulen

Firefox Release Manager