One my favorite Firefox Add Ons. I have about 580 blocks defined, most of them mainstream media and clickbait channels. Some channels aren't that bad, but if they use click-bait headlines, I block them. Period. Little persistent bug is that your browser hangs if you click on a video from- or land on a channel you have blocked. Videos from blocked channel usually doens't show in searches or recommended list, but sometimes it does and it might trick you into clicking, resulting a frozen browser. So 4/5 stars. Well deserved.