I typically end up installing chrome for the odd website that does require it. Firefox is still my daily driver on all platforms though, not sure what Mozilla is thinking with their future plans.
No, Chrome. Specifically for the DRM stuff to access streaming services and casting, things that don't quite work well with Firefox (by design). I use libre stuff when I can, but I make exceptions, I know not everyone uses Linux that way.
have you tried switching useragent? The websites I've been to have either been solved by useragent or chromium (just one site didn't work with firefox and useragent)
Switching user agents isn't going to get around DRM implementations. Anyway, that was for specific streaming services I'm not using any more, so I haven't needed to use Chrome in months.