10 thumbs up! Rated 5 out of 5 stars

Excellent. I would argue THE MOST ESSENTIAL ADD-ON followed by a very close Ad Block plus.Does everything it promises and more.It is a preventative anti-spyware as well- it keeps your computer "immunised" from spyware/malware/ pop-up and pop-under crap.Blocks all (or close enough) tracking crap. Very low on machine resources.I especially like the Context menu- very clear, concise and easily navigable.

Post script: I read through all of the developer's responses and found they were highly professional: courteous and explanatory.
Superb work guys.

This review is for a previous version of the add-on (2.5.2.1-signed).