The Android Firefox, formerly known as Fenix, has a separate tracker on Github. However I wouldn't say that it's radically divergent in habits—more of a different take on the same problem that Mozilla has very limited resources and its own vision, whereas the hordes of users have thousands of their own wishes. E.g. the Fenix' tracker finally clears out stale bugs, at least occasionally, instead of letting them ferment for many years.

Anyway, personally I came to terms with the fact that open-source devs aren't my bitches, and just accept with gratitude what they offer to the world, while abstaining from polluting the trackers even further. However, I'm not above a hopeful whisper into the noosphere.