I also had the toolbar disappear yesterday along with no menus. Menus still drop down for every other application and the OS. I don't have any bookmarks show up and when TenFourFox (38.3.0 and used successfully for a week or two) is highlighted and the only window open, all I can do is search or type in an address. I also can't cut or copy from websites. I have re-downloaded 38.3.0 and it does the same thing. I have tried 38.2.1 & 31.8.0 and they still do the same no toolbar or drop-down menus.