I've been using Comment Blocker for awhile on Chrome and just installed it on Firefox. Works like a dream on both browsers. There are several sites I love to visit, but the comments section are so vile that it ruins the experience and makes me tired of people. This add-on is a game changer and I can't recommend it enough. I was surprised to see how different the experience is and how much better I feel without suffering through everyone's opinion on whatever today's outrage is.