To test, browse to http://www.mozilla.org/en-US/firefox/geolocation/

Click 'Give it a try!' and then click the "Where am I?" button. Does it work for you?

"Oops! An error occurred while trying to determine your position."

I've tried it on multiple computers and networks and am having this error, the JS console outputs: "PositionError {message: "Network location provider at 'https://www.googleapis.com/' : Returned error code 404.", code: 2, PERMISSION_DENIED: 1, POSITION_UNAVAILABLE: 2, TIMEOUT: 3}"

Cheers