What To Look For In Firefox 3.5 – PC World – One of my favorite enhancements:
Lost and Found – Firefox 3.5 now permits sites to find your location by using your IP address and by gathering data about nearby Wi-Fi networks, via Google Location Services (if you have WWAN card in your notebook, it will use cell-phone towers to find your location, just as Google Latitude does). This feature could be particularly useful for people who are visiting map sites or business user-review sites in search of nearby locations (though few sites support geolocation at present).