Remember how you could hide/show toolbars in Netscape? (check the
picture) http://img190.imageshack.us/img190/881/imagem899.jpg

Is it possible to have this in FireFox?

I don't want it shown/hidden all the time, and I think this is the
easiest way to change.

I know there's a Stylish code to automaticaly hide it but every time
you move the mouse cursor over the toolbar area it shows, even when
you don't want it to show actually.

http://img190.imageshack.us/img190/881/imagem899.jpg