Each time I make a query in the Address bar, there's a drop down menu that appears (full of suggestions). Is there any solution to disable it. Under Firefox 3 , if you want to delete an individual entry from the History, just highlight it (either in the History sidebar or in the address bar drop-down menu) and press Shift+Delete. Gone, never to bother you again! This method works for Windows users but won't work for Mac users.
For Mac user: