"Minimap is a Firefox add-on that gives you a suite of in-built maps and mapping tools for your web browser. Create and save a sidebar map using the addresses or address links you find on web pages (highlight then drag and drop), or by manually adding locations... "

This is a nice add-on for Firefox. Notice that if you visit pages with geo-location information, the geourl is automatically displayed and if clicked on will take you to the specific location referenced by the page you are browsing.

by way of ogleearth