Rated 3 out of 5 stars

I keep clicking dislike but nothing happens :) i love the idea though

edit: only version i can find of the addon is Facebook Dislike 1.3.3.sdk.1.1

This review is for a previous version of the add-on (1.3.3.2). 

On which version?
Update to the latest version 2.0.1 (due to new facebook change old version can't work).

Edit : version 2.0.1 is now approved by mozilla.