Absolute simplicity Rated 5 out of 5 stars

This addon will block URLs that you wish not to go. For example, if you do not wish to visit a page, put that url in the contentblock-regex.txt file and reload your browser.

Example (for blocking a facebook profile)
Just put the profile ID/name in the file. That'll do

This review is for a previous version of the add-on (0.0.8.9m).