You can check the Browser Console ("3-bar" menu button or Tools -> Web Developer) if there are error messages about this extension. Open the Customize window and set which toolbar items to display. *"3-bar" menu button -> Customize *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 Customize palette to the Customize window to the Bookmarks Toolbar *if missing items are in the Customize palette then drag them back from the Customize window to the toolbar *if you do not see an item on a toolbar and in the Customize palette then click the <u>Restore Defaults</u> button in the Customize palette window to restore the default toolbar set. *https://support.mozilla.org/kb/customize-firefox-controls-buttons-and-toolbars *https://support.mozilla.org/kb/navigation-buttons-missing