It's a good browser! I've used it since the days of mozilla. It's only gotten better. Honestly I really prefer it to chrome. FF mobile is best in class as a mobile browser for the sole reason that it allows extensions like ublock. FF developer edition is, imho better than chrome.

I tried chrome on linux some years back, and experienced an issue where the browser would crash the os on the extensions search page. Years went by without this being fixed. Firefox would never do that.