I wasn’t a fan of Firefox either and personally lived using edge. When the whole web integrity thing started happening, I felt like I should switch to Firefox and haven’t looked back.
I still have some complaints, like you can’t install sites native app which I used a lot. I don’t think tab groups have been implemented yet, which isn’t a huge deal but very useful. And there were a few others I can’t remember off the top of my head. In the end I value my privacy a bit more so I’ve decided Firefox is worth it.