The issue for me with Firefox on Android is it would sometimes refuse to load pages when switching back after being suspended from the background and I have no clue why. I'd have to open a new tab and copy the URL to force it to load and it was so frustrating.

I use Brave now (with the promotional stuff off, even though I still don't fully trust them), since it seems to be the only other ad-blocking browser on Android that's even decently easy to use. However, I still use Firefox on Windows with tree style tabs and raindrop.io to sync bookmarks, both of which are god tier productivity tools.