Worked great for a long time but stopped working on youtube over time by first having ads skip to the skip button, and then stopped blocking youtube ads completely. I followed the developer recommendations from other review responses and they didn't help. As someone who spends a lot of time on youtube, I had to find another solution. I added Ublock and haven't gotten an ad on youtube since. Perhaps the paid pro version of ABP works better on youtube but I wasn't going to take the chance of upgrading just to find out it doesn't. ABP used to be the best ad blocker. It's a shame that it no longer works as well as it used to.