The latest Firefox 3.5 browser comes with Location-Aware Browsing feature which will provide users with location specific information that relates to their local area, which can be helpful for online mapping applications or searching for nearby businesses, such as a local grocery store or movie theater.
However If you don't like the new Geo-locating features in the upcoming Firefox 3.5 release you can turn them off by:
1. Opening Firefox.
2. Go to the Address bar and input about:config.
3. If you see a warning appear, click the I’ll be careful, I promise button.
4. Go to geo.enabled and double-click it.
5. The value for geo.enabled will change to false. You have just disabled Location-Aware Browsing.