The problem in osx is not that it's slow, but the ridiculous amount of cpu (and therefore battery) it consumes.

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...

If Firefox is chewing through all your CPU from the moment it opens you need to reset your profile.

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.

I've uninstalled and installed Firefox several times during the years, in different machines even (MacBooks between 2013 and current models). Same feeling from most developers working at my workplace (~1000 devs in the building, not one using FF on a Mac ).

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.

Reinstalling Firefox on a Mac is not the same as doing a Firefox Refresh. The former only touches the executable while the latter cleans up cruft in your Firefox data (potentially lingering around from legacy extensions).

I understand that, but I assume both of those are still "shallower" ways of resetting than actually switching computers, which I've done several times (for unrelated reasons ofc) and I've seen no improvement...