How does my browser detect my location even via proxy?
Common sources of location information include Global Positioning System (GPS) and location inferred from network signals such as IP address, RFID, WiFi and Bluetooth MAC addresses, and GSM/CDMA cell IDs, as well as user input.
So, I proxied my IP. I have no GPS on my PC and do not use WiFi or GSM either. How did this happen? Note that it is accurate to the street.