IF FF ever implement support for tabs on tablets I might consider using it.
I only use phone and tablet and to use a glorified phone app on a tablet is not a great experience. Almost every other browser in existence supports tags for larger screens.
Until FF fixes this it doesn’t matter how many extensions they allow in the browser I’m out.
Run a noads DNS on the phone, either libredns or mullvaddns, neither outlook or Gmail will show ads.
In fact you won’t have any ads period.