Out of the box it can play audio in the background, and now that extensions are available you can block ads as well. You don’t really need constantly updating 3rd party clients or questionable firewalls anymore if you just want usable youtube on a phone.
I love Firefox, but if you have a non-rooted phone, DuckDuckGo is better.
Mull
I agree, and here is a good resource explaining:
https://divestos.org/pages/browsers
Its a webview browser which is just a chrome system widget.