Where to find it? in case we need to give some site address to Block? Rated 5 out of 5 stars

I've just added it but I can't see it under Tools/adons/options nor elsewhere in browser's command menus.... I'm using FireFox 18.0.2. have you modified it to work in background or I'm not getting the point?

This review is for a previous version of the add-on (1.9.1-signed).