I’ve been using it as my primary browser on Android for years so I don’t really have much to compare it to, but I haven’t had any issues with extension compatibility. It includes changes from Tor browser and Arkenfox so it’s more privacy-focused than on performance.
Just turn the updates off. Might want to remove the seatbelts from your car too, so annoying having to put them on and take them off every time you need to drive somewhere.