Yep, IronFox is the Android equivalent of LibreWolf. I use it and it’s good, compatible with extensions too

I think YouTube has said that Premium, formally Red, viewers do count more for ad revenue and other things like that for creators than free viewers. A streamer I follow I think said they were worth 5x for him

Ah, no it does not do that

Like if you visit a link or go to someone’s profile, then go back to return to the comments, will your scroll position be remembered so you can see the comment you were just looking at? If so, yes