If you google 'ublock', at least for me, the first results should tell you what it is. You can also see that it seems to be owned by gorhill on github. I would

If you google 'ublock', at least for me, the first results should tell you what it is. You can also see that it seems to be owned by gorhill on github. I would like titles to be altered to tell people what the subject is actually about, or give some background, but I can't see that happening soon, so I'm sorry but you'll have to google for now.