Ive been cleaning some stuff from my computer and noticed Microsoft folder in /Library/Fonts folder (not in my user Fonts folder). I figured it was from Office back when I installed it and the uninstalled it but it obviously didnt unistall these fonts. Many of the provided fonts are already available on the OSX so I figured it is safe to remove that folder. But it wasnt . Firefox lost all the text so I had to restore that folder and then everything was OK. Is it possible to remove link with that fonts and leave it to OS fonts?