Well if I have a tablet, it wouldn't be for Linux based apps, unless maybe some SSH/terminal stuff anyway. The apps mentioned would need to update to properly support tablets, if they haven't been yet.
You get the latest release straight from the source, best benefit
Bookmarks?
I use newpipe or libretube on mobile.
When you use Play App Signing, your keys are stored on the same secure infrastructure that Google uses to store its own keys. Keys are protected by Google’s Key Management Service. If you want to learn more about
For apps created before August 2021, you can still upload an APK and manage your own keys instead of using Play App Signing and publishing with an Android App Bundle
I would recommend buying a pixel tablet and installing [email protected] on it. [email protected] is private and doesn't send anything to Google. You can get a pixel tab second-hand.
You mentioned, firefox. The app could be updated to better support tablet UI. That's what I meant.