Best addons Rated 5 out of 5 stars

Adblock Plus(Limited my Data usage)
Foxtab:(Easy & Stylish browsing)
Last pass:(Stopped hitting my keypad oftenly)
Screen capture Elite:(User friendly)
Save images by lumox:(Saves my time)
Firefox addons saves my time as money.. So of-course i am Happy.

This review is for a previous version of the add-on (1.1.9).  This user has a previous review of this add-on.