i wish they'd include vertical tabs and oneline navbar in settings rather than making the users edit userchrome. userchrome is really fun but it'd be much more accessible if it was on settings.
It is not fun for me when the most beautiful themes are meant to be used on Linux or Windows and the Window buttons are all messed up for macOS (or won't even show up), you can't literally be without those window buttons on macOS because you can't maximize FF from the dock as any sane dock or taskbar.