This add-on is now completely useless to me. It used to be great until a few days ago. I used it to block the URLs of annoying embedded portions of otherwise useful websites. I was able block websites based on just part of the URL without needing to know the whole web address (for example I could even input the wildcard *biz* if I wanted to block anything from [.biz] domain. It was super awesome and useful. And every time it blocked a site, I just got a discreet little popup in the bottom right of the screen telling me that a part of the website was blocked. Blocked embedded areas just showed as blank, nice and simple. Now all of that is gone! Suddenly this extension is absolutely USELESS with the new update. Wildcard entry (blocking any URL which contains a specific character-string) appears to now not be supported. NOT WORTH THE EFFORT OF EVEN DOWNLOADING THE ADD-ON! Like somebody else below, I actually created a new Mozilla account just so that I could write this review! That's how disappointed and upset I am with the new update. II would give Zero Stars if I could. Come on guys! Why did you have to take something that was so very useful and break it? Will somebody please write a new extension that does what this one did before a few days ago? Please?