You can switch between the orange Firefox button and compact menu and the full length classic menu bar using either of these: * right-click a blank area of the tab bar > Menu Bar * tap the Alt key > View > Toolbars > Menu Bar * orange Firefox button > Options fly-out menu > Menu Bar Does one of those work? If you don't even have the orange Firefox button, you might be in full screen mode. Use the F11 function key to switch between full screen and normal view.