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I used to use Firefox but half the websites I visted were broken on it. Companies don't make their websites compatible with it anymore which really sucks. If Chrome kills adblocker, I'll switch back, but it's just annoying when you get to the middle of a transaction and the site stops working because the devs were too lazy to test on anything but Chrome.
What kinds of websites are you using? Been using Firefox my whole life, and the only instances I can remember of stuff not working on it are the web version of Microsoft Teams (Which works now), one proctoring site which required Opera, and some website where you could create music from samples that for some reason required Chrome.
https://webcompat.com/issues/new
complaining here won't solve anything