I prefer using different browsers for different purposes. This is good for privacy but also with keeping things organized, including things like extensions and bookmarks, which can grow quickly if you don't keep an eye on it.
Since Mozilla announced its new privacy policy, I've been using Brave, Vivaldi and Librewolf. I'm quite pleased with Vivaldi in particular, which I've tried many times before and there was always some problem with it, but it seems they're now finally at a good stage. I even installed it in my phone to give it try.
This may not be Firefox fault. I'm not saying that is the case for you based on what you're describing, but the web being overtaken by Google does have its downsides: