Hi Jekku, I completely understand your frustration and I'm sorry for the confusion! You are totally right—the extension currently defaults to 'OFF', which is why it wasn't blocking the images for you, and that UI popup is definitely getting in the way. The good news is that I have completely fixed both of these issues in the next update. The filter will soon default to ON automatically, and those UI popups have been removed. I hope you'll give the new version a try once it's out!