A ton of websites? I block 3.5 million domains through DNS and run uBlock Origin, Privacy Badger and some other anti-tracking bits and pieces, and I've only ever had problems with a small handful of sites, which were almost all resolved by temporarily unblocking something. I have had to hop over to a Chromium-based browser only once in recent months, for one particularly badly implemented website. Where are you seeing this "ton" of sites that break? My experience has been quite different.

I find it's just fine to use Firefox and hop over to Brave about once a year when something doesn't work.