Right now the only way I see to show/hide the toolbars (tab bar, url bar, etc) in Full Screen on Firefox for Mac is to right click the toolbars and click a button in a context menu but I want to toggle this more quickly than that.
The way Chrome does it is you toggle toolbars with cmd+shift+f. and toggle Full Screen with fn+f
Firefox toggles Full Screen with cmd+shift+f which is an anti-idiomatic keybind for the Mac platform.
I want cmd+shift+f to toggle toolbars and fn+f to toggle Full Screen.