Make sure that you do not run Firefox in full screen mode (press F11 or Fn + F11 to toggle; Mac: Command+Shift+F). *https://support.mozilla.org/kb/how-to-use-full-screen Make sure that toolbars like the "Navigation Toolbar" and the "Bookmarks Toolbar" are visible. *Firefox menu button > Options *View > Toolbars (press F10 to display the menu bar) *Right-click empty toolbar area Use Toolbar Layout (Customize) to open the Customize window and set which toolbar items to display. *check that "Bookmarks Toolbar items" is on the Bookmarks Toolbar *if "Bookmarks Toolbar items" is not on the Bookmarks Toolbar then drag it back from the toolbar palette into the Customize window to the Bookmarks Toolbar *if missing items are in the toolbar palette then drag them back from the Customize window on the toolbar *if you do not see an item on a toolbar and in the toolbar palette then click the "Restore Default Set" button to restore the default toolbar setup *https://support.mozilla.org/kb/How+to+customize+the+toolbar *https://support.mozilla.org/kb/Back+and+forward+or+other+toolbar+items+are+missing