How will it work? According to Doug Turner, one of the geo-location feature developers, “This feature is completely opt-in! If you don’t do anything, geolocation is never used. When a web page wants ask you for your location, you get an dialog similar to the one below. If you do nothing, the feature stays off by default. Only if you press “Tell them”, will you send out your location information.”
What it means: in 35 days, Firefox 3.5 will be available for download (you can find the beta version here) and will provide access to geolocation data. I believe this is the beginning of a brave new local world online and every major site will try to provide a local view for their users. Is your site ready?