How does FF 3.5 get the location? The example asked me to share location, but then showed me in the middle of New York City when in fact I am in Burlington Vermont
FF 3.5 uses your IP address or wifi basestation id to retrieve the location and there is no guarantee that is accurate. In order to be accurate you need to use GPS or Cell Tower Locating from you cell phone.
The service they use is particularly bad then. Most places I have tried get within a few towns for my office. (Obviously none can get my home satellite connection correct)