Did not work : example Bewertet mit 2 von 5 Sternen

Did not resolve following easy shortened link : http://bit.ly/MyFirefoxAlbum
Not a reliable extension a this time, but as mentioned, still experimental

Diese Bewertung wurde für eine vorherige Version des Add-ons (1.0.1-signed.1-signed) abgegeben. 

I'm sorry that you have had a problem with our service. The problem seems to have been caused by an unresponsive server either on our end or bit.ly's end. To hopefully resolve this I have changed our system so that in the event of it failing to unshorten a URL, it will retry once - This should hopefully allow your request to go through automatically.