But that will only happen when the user base falls, so enough people will have had to move on organically, for popular tools like web browsers to give up.

Firefox didn’t end windows 7 support until July of last year. 3 years after eol for 7 and when 7’s market share among windows was around 3 percent.

And just eol’ing Firefox doesn’t immediately break it, you will have at least a couple years before the browser becomes functionally useless.