Windows 8. Using firefox. When I create an email and start typing the name to whom I want to send it an alphabetical  list  of names comes up  starting with the letter I have typed and I select the one I want. Many of the names are old ones, invalid addresses, that don't even exist anymore. These names are not listed in my address book. How can I eliminate those names in the popup list I don't want?
				
			 
	