It’s a simple principle, actually: the Internet runs on cat photos. So why not put them wherever there’s an empty space on your screen? CatBlock is the proponent of this revolutionary idea, and it’s latched onto the popular ad-blocking program to do so. For users of AdBlock, which removes advertising scripts on certain Web pages and shows a white spot instead, today those usually blank patches have been replaced by cats. We can think of no better Internet enhancement than this. Its creators note that it will be going away tomorrow, but if there’s enough interest, there might be an official CatBlock release in the future.