https://blog.mozilla.org/futurereleases/2023/07/06/firefox-support-for-windows-7-8-and-8-1/

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Firefox support for Windows 7, 8 and 8.1


Ryan VanderMeulen
July 6, 2023

With Firefox 115, users on Windows 7, Windows 8 and Windows 8.1 will
automatically be moved to the Firefox Extended Support Release (ESR).

Firefox is the only major browser that still supports users on these
operating systems. Moving users to the ESR 115 version of Firefox
will allow Mozilla to continue providing security updates until at
least September 2024. Users do not need to take additional action to
receive these updates.

We strongly encourage users to upgrade to a version of Windows that
is supported by Microsoft. When migrating to a new device, users can
use a Firefox Account to easily keep all of their settings, ensuring
all bookmarks, browsing history and saved passwords are immediately
available after installing Firefox.

Unsupported operating systems receive no security updates and can be
dangerous for you to use. For planning purposes, enterprises using
Firefox should consider September 2024 as the support end date for
Windows 7, 8 and 8.1.

Previous article Firefox support for macOS 10.12, 10.13 and 10.14
July 6, 2023

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