perfect thing BUT Rated 4 out of 5 stars

missing custom makers of shortcuts, eg.

This review is for a previous version of the add-on ( 

That's not true: You can specify your URL shortener by editing an about:config value:

Until very recently, Mozilla's add-ons SDK did not contain any way to make a preferences page for your add-on so that was an issue. I should be able to make editing the custom URL shorteners easier soon.