Hi Jay, sites usually guess your location based on the IP address assigned by your internet service provider. If you give a site permission to access your precise location, Firefox asks Windows for information about nearby WiFi hotspots and uses a Google API to triangulate your location based on that information. These are both subject to incorrect information in the lookup databases. As far as I know, Firefox doesn't have a way to enter your specific latitude/longitude or zip code to pass along to websites.