"Whether you refer to online maps occasionally or on a daily
basis, you can add several extensions to your Firefox browser to
make Web-based mapping services even more useful.
"Mini Map Sidebar is a suite of maps and tools that lives in
your browser's sidebar. It offers integration with Google, Yahoo!,
and Windows Live Local mapping sites, as well as Google Earth and
GoogleSightseeing.com. Drag and drop addresses or enter
geographical coordinates manually, choose from three displays
options--map, satellite, and hybrid--then pan and zoom to get just
the view you want..."