> We need a Firefox with good defaults and it seems like this browser is such a thing.

If you're looking such option for Android, you can check out Mull [1] which is available on F-Droid [2] as well and use it along with uBlock Origin.

[1]: https://gitlab.com/divested-mobile/mull-fenix

[2]: https://f-droid.org/packages/us.spotco.fennec_dos/