Review for Silent Block by Pinky!
Rated 4 out of 5 stars
This is a powerful addon, but requires knowledge of regular expressions. You need to be able to write appropriate matching patterns, although there are some samples in the author's web site. If you are not comfortable with regex, better go to another addon.
This review is for a previous version of the add-on (1.2.2.1-signed).To create your own collections, you must have a Mozilla Add-ons account.