Windows Server 2012 R2 is derived from the Windows 8.1 codebase and based on Bug 1594270 the support for Windows 7, 8, 8.1 will be until at least Firefox 115.0 out on July 4, 2023. This is good as the next Release that ESR will be based on will be Fx 115.0.

Hi James,

Thank you for the information.

Regards, Jerry.

As of today it is confirmed that Firefox users on Windows 7, 8, 8.1 and macOS 10.12, 10.13, 10.14 will move to Firefox 115 ESR as Firefox 116 and later will drop support.

https://support.mozilla.org/en-US/kb/firefox-users-windows-7-8-and-81-moving-extended-support https://support.mozilla.org/en-US/kb/firefox-users-macos-1012-1013-and-1014-users-moving-to-extended-support