Firefox File, Edit... Menu

Hey guys, i konw It`s possible to remove File, Edit... menu form Firefox but when I go

View-Toolbar-Customize i cant`t drag File menu from the main window (but I can all the other buttons an fields)!!!!

How do I do this?

#121320

compact menu: http://extensionroom.mozdev.org/more-info.php/compactmenu

#121322

Thank you very much dreamz

#121324