Just started playing with Geolocation. And I see that you get a request (at least in Firefox) about if I want to share my location.
But then I wonder, how is Facebook able to get my location without asking the same thing?
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Just started playing with Geolocation. And I see that you get a request (at least in Firefox) about if I want to share my location.
But then I wonder, how is Facebook able to get my location without asking the same thing?
They don’t.
Facebook, and many other sites, use your IP address and public WHOIS data to guess where you are.
There are many databases available for this sort of lookup. I’ve used MaxMind’s free database with decent success.