i've had recent cause to reset my 2017 iMac running OS 13 back to factory settings. this has cause all kinds of problems, and now i need to set up a new user account. i identified the relevant profile, and copied it to the new user account. i then opened Firefox and typed "about:profiles", and the new profile is not in the list, even though it's in ~/Library/Application Support/Firefox/Profiles/. i tried compressing it before copying it, but that made no difference. i've tried logging out, restarting, and switching on and off again. so i'm stuck in between two users, one with all my data, and the other with Firefox (and possibly Thunderbird, haven't even tried that yet). this makes life unbelievably difficult. i really need my Firefox profile back. desperately hoping someone can help. thanks for reading.