[mnoorenberghe]

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).

[torben-friis]

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...