This is the software publisher's description.

The Minimap Addon 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. View traffic Info, drag and drop kml files, local search, Google, Yahoo and Live Local directions, view in Google Earth, tagzania, platial, geourl and many more. Address/Location points are stored locally for later use.

This extension comes with two mapping components, the main and most powerful one being a minimap sidebar. In this sidebar you can drag and drop addresses or locations you find on web pages and they will be automatically located, and added to your saved address list. The sidebar is launched from the toolbar icon (customise toolbar and drag in), a statusbar icon and the view sidebar menu. The extension also comes with a main browser Map Tab for viewing a larger map and this is accessed from the statusbar or by highlighting an address, and selecting 'Map Tab: Locate Address...' in the right click context menu.