function fail never called if user declines to share geolocation in firefox

So I have this javascript code. In safari and chrome, if user declines to share location, it goes to fail function as it should; however, in Firefox, it does not.

Any helps appreciated.

function initGeolocation()
{
    if( navigator.geolocation )
    {          
          // Call getCurrentPosition with success and failure callbacks
          navigator.geolocation.getCurrentPosition( success, fail );
    }
    else
    {
          alert("Sorry, your browser does not support geolocation services.");
    }
}

 var map;
 function success(position)
 {

     var longIDText = document.getElementById('longID');
     var latIDText = document.getElementById('latID');
     longIDText.value = position.coords.longitude;
     latIDText.value = position.coords.latitude;
     document.getElementById('coordSubmitID').click();
  }

  function fail(error)
  {
          alert("FAAAAAAAAAAIIIIIIIIIL")
          var zip_code ;
          while (true){
              // Could not obtain location

              zip_code = prompt("Please enter your current address or zip code","");


              if ( zip_code == "" ) {
                  alert(zip_code +" is not a valid address. Please try again.");
              } 
              else{
                break;
              }
          }
          var zipIDText = document.getElementById('zipID');
          zipIDText.value = zip_code;
          document.getElementById('coordSubmitID').click();
  }