The '''AwesomeBar''' results you see in the Location Bar before you hit "Enter" include both history and bookmarks. Deleting history has no effect on bookmarks. But '''Deleting "404 Not Found"''' entries from Location Bar autocomplete ('''AwesomeBar''') through the History Sidebar or History Library list can be very useful as in [http://kb.mozillazine.org/Viewing_the_browsing_history_-_Firefox Viewing the browsing history (Firefox)] which describes working with your history and deleting such annoyances collectively is a lot faster than deleting them one at a time from those or from the AwesomeBar drop-down with the "'''Del'''" key. <hr> Corrected link.

Worked GREAT. Thank You.