Rated 2 out of 5 stars

it also ads an ad frame...

This review is for a previous version of the add-on (1.0.1). 

Yes

We add a little add to finance our server.

If you want a usefull and working Dislike button for Facebook, it's the way to have it.

But if you dislike ads, you can download Adblock+, a very usefull addon. ;)