Hi, Firefox is my usual browser and I have used it on many different OSs. The first thing I always do when installing Firefox on a new OS is ensure that the Menu Bar (File, Edit, View etc) is displayed permanently. Usually this is not a problem, but on Ubuntu 16.04 and Firefox 54.0 this is giving me problems. Usually I would just press the Alt key to make to display the menu bar and then use the VIew > Toolbars > Menu Bar to display it permanently. (This approach worked on an installation of Xubuntu I have on another computer). However on Ubuntu pressing Alt brings up the HUD search menu. OK, so I went to Settings > Keyboard > Shortcuts and turned off this shortcut, but now pressing Alt has no effect. It doesn't display the HUD and it doesn't display the Menu bar. After googling around I determined that I could go to Open Menu > Customize > Show / Hide Toolbars > Menu Bar. This seemed like a winner, but when I open the Show / Hide Toolbars dropdown, it does not contain the Menu Bar as an option. The Bookmarks Toolbar is the only option here. At this point I went back to my old Xubuntu (remember, also using Firefox 54.0) and had a look at Open Menu > Customize > Show / Hide Toolbars. In Xubuntu the Menu Bar is given as a selectable option. Why not in Ubuntu? OK, so what do I have to do here? (And full screen mode is not on)