Minimap is a thoroughly marvellous extension for Firefox.
Simply highlight an address, and drag it into the Minimap sidebar (or separate tab). It marks that address on a Google Map. Nothing more, but it is an incredibly simple way to find an address. No need for copy and paste; the address text doesn't even need to be in a Firefox window. Just drag and drop.
(Alternatively, you can scroll through a list of open tabs, and locate any or all addresses therein. Many more navigational features that I haven't fully probed yet.)
The resolution was fine enough to locate my own address in the right part of the street. But I've used it several times for places I did need to go, and it completely obviates the need for any navigation. Far simpler than a street directory; simpler than Google Maps itself.