Good App Rated 5 out of 5 stars

I was really missing the Delicious Plugin on FF 4 and almost decided to roll back to 3.6 till I found this plugin. Its really good and functional, not heavy on the UI or anything.
If you want to activate this plugin, go to View-->Toolbars-->Customize and then drag and drop the Plugin Icon to your tool bar and voila, suddenly all is right on the FF 4 again

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