Hello Christian,

I believe you want this to popup as soon as the user earned a badge, am I correct? Unfortunately this isn't possible out of the box but if you have some javascript knowledge, you could hook into the event "notifier.updates" on the window to detect for new notifications.

Example:

[gist]
$(window).on('notifier.updates', function(event, data) {
console.log(data);
});
[/gist]