Rated 5 out of 5 stars

Works and does it job.

A small tip for those who want to block "service X". Use the system's "hosts" file for this and block the all known domains, it's guaranteed! :)

First review Rated 5 out of 5 stars

When this add-on is enable you can't visit "www.twitter.com"! If you select it in new tab, your page will be blank and that's all.