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Firefox is ending support for Windows 7, 8 and 8.1, and users are urged to switch to Linux
(www.pcgamer.com)
This is a most excellent place for technology news and articles.
substitute "Windows" with "computer". If you have any history of resolving "this doesn't work for me" on your own (as opposed to waiting for someone else do to it for you), you will be fine. Just be sure not to jump into unknown when you have urgent important things to do :)