Things worked okay is Firefox 10.x but with the upgrade to Firefox 11 has thrown up a problem.
I use
navigator.geolocation.getCurrentPosition(succes
Okay, so the answer for now is: "Not possible, Firefox by design will not fire the failure event. Build your app around this constraint."
Actually you get the error callback in Firefox ONLY if you click Never share location.
Because when you click Not now (or just close the popup), you can still click the location icon in address bar and allow it later.
(tested on FF28)
edit: here is a demo of how to detect location with special note for Firefox.