Rated 4 out of 5 stars

Excellent idea. However, I will not use this permanently as long as this addon "EXPERIMENTAL", as this is the first addon of this developer.

This review is for a previous version of the add-on (0.7b.1-signed.1-signed). 

A preliminary review marks the add on as "experimental" .Preliminary reviews take 3 days (ours took over a month due to the controversial nature of the add-on), a full review takes 10 days.Now that we know Mozilla stands by its convictions against all bullies we will be applying for a full review which will take this out of "experimental".In the meantime the code is open source, we have nothing to hide unlike the DHS/ICE and other alphabets...

We have also taken the necessary steps to come out of "EXPERIMENTAL" but it will take a few days as we are in queue.

Edit 30June:
No longer "experimental", its fully reviewed now!