Bave is the only browser I know of that performs the https://coveryourtracks.eff.org/ test as well as the Tor browser even without extensions or Tor network connection and thus better than Firefox, even with extensive privacy and anti-tracking settin...
Mozilla collects and should already have data on their servers about which add-ons are installed more often on Android/Mobile from the Custom Add-On Collections and therefore probably work without problems or am I wrong?