Make sure that toolbars like the "Navigation Toolbar" and the "Bookmarks Toolbar" are visible: "View > Toolbars" *Open the Customize window via "View > Toolbars > Customize" *Check that the "Bookmarks Toolbar items" is on the Bookmarks Toolbar *If the "Bookmarks Toolbar items" is not on the Bookmarks Toolbar then drag it back from the toolbar palette in 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 set up ---- *http://kb.mozillazine.org/Toolbar_customization *https://support.mozilla.org/kb/Back+and+forward+or+other+toolbar+items+are+missing

your solution fixed the problem Thanks