NewPipe and IronFox (hardened Firefox) for Android, although I suspect these need to be "sideloaded" as Google won't allow them on the Play Store. (I run Graphene so this does not apply to me.)

For the TV, I would suggest VacuumTube (a frontend to the Leanback interface) on a free/libre box running Linux.

Firefox + uBlock Origin works just fine on Android.

I'm currently using Firefox + ublock origin on Android while typing this...

SmartTube and Revanced