This Firefox extension uses a Wi-Fi Positioning System to perform searches based on your location; however, we found that its primary selling point needs some work.
Loki's toolbar is simple, with a pleasant-looking user interface. It features a publisher shortcut button and search functionality powered by Google. When we clicked on the Find Me button, it pulled up our general location, but not our exact location. There's a button for fine-tuning your location, but it's just an option to enter your address. Once we did so, our location came up on the Loki map. From the toolbar, you can send an SMS and an e-mail with your location in the message. There's a shortcut button for a geotag, but were not sure what it does since clicking on it returned nothing. The Channels drop-down menu includes weather, traffic, entertainment, and dining information all tailored to your location. A few of the sites were slow to load, but each channel pulled up information close to our location.
You may have to help Loki find you, but this freeware is pretty good at finding local destinations and information.