Consider enabling the profile migration (or disabling it only for TBB)
Resetting profile is not possible at the moment, neither in Tor Browser, nor in Mullvad Browser.
The reason is that profile migration has been disabled in #41577 (closed).
This is something that has been there forever in macOS, and then I've decided to move it to the main repository (which was a better plan than keeping it in a .ini
file, I've found immediately why the profile reset was not an option anymore in about:support).
My idea was that for a privacy point of view, not mixing browsers was a good idea, so I didn't deep the reasons on why profile migration was disabled in the first place.
I think I didn't ask UX opinion, and that was an error on my side. A better solution would be to look for the problems that macOS had in the first place and/or build with this option changed.
Probably, Sponsor 131 work improved the situation with the profile management also for Tor Browser, and it should be able to deal with multi profiles, too (apart from the tor daemon management, which Arti will fix). I expect profile reset to work, too, since NoScript is also in the distribution directory (and should be available to new profiles; I recall trying and having success).