For the people who suffer the bugs ( which seems to be a majority of users that have a retina display, and specifically those who use it set on high resolution) just opening firefox will quickly lead to the macbook's fans spinning at full throttle and battery drain. There are issues opened and development supposedly in progress, but it's been like that for months if not years. At this point I would take whatever could speed up the process...
https://support.mozilla.org/en-US/kb/profile-manager-create-...
I don't think Firefox can fix all the bugs at the same pace Chromium can.
For some reason every time I talk about these bugs on the internet people treat it as a weird edge case I'm going through, but talking IRL with people about Firefox everyone seems to know how unusable it is in a Mac - not only in my circle of acquaintances.
I'd happily contribute to a patreon or something if it meant increasing the chances of having a usable version of firefox on my mac at some point.