If the new Geo-locating features in the upcoming Firefox 3.5 release just don't jive with your privacy-conscious self, you can disable them easily with a simple tweak.
Over at the How-To Geek site (my home away from Lifehacker), former Lifehacker intern Asian Angel writes up the quick and easy process to disable the feature for good—since Mozilla didn't see fit to include it in the options panel. Readers will note that Firefox won't give out your location automatically—you will be prompted to share you location whenever a site requests it, so it's really more of an annoyance if you don't ever plan to share the information.
To disable it for yourself, head over to about:config and change the geo.enabled value to false by double-clicking on the key. Hit the link for the full guide, including a walk-through of how to disable the feature for a site you already chose to share your information—and for the tin-foil hat crowd, how to rid of the random client identification number.
For more, read up on how the Geode extension brings location awareness to Firefox—the same extension that powers the location-aware feature in the upcoming 3.5 release.
Deactivate Location-Aware Browsing in Firefox 3.5 [How-To Geek]