You can only remove history items with a clock icon attached directly form the drop-down panel. Other items like a star (bookmark => Library) or a pin (site pinned on Firefox Home) you need to remove from their own storage. You can use these steps to remove saved items from an autocomplete drop-down list. #highlight an entry in the drop-down list with cursor Down key<br>do not click the mouse or press the Enter key #press "Delete" or "Shift+Delete" to delete the highlighted entry Note that hovering with the mouse doesn't work. *https://support.mozilla.org/en-US/kb/remove-websites-address-bar-suggestions *https://support.mozilla.org/en-US/kb/firefox-suggest