http://labs.mozilla.com/geode_welcome/#content

Thansk for installing Geode, an experimental Firefox add-on to explore geolocation in Firefox ahead of its implementation in a future product release. Geode provides a rudimentary implementation of geolocation for the current version of Firefox uses a single hard-coded location provider to enable Wifi-based positioning conforming to the W3C Geolocation specification so that developers can begin experimenting with enabling location-aware experiences today.