Grumpy Old Geeks Products Perceptual Ad Blocker Product Perceptual Ad Blocker 2 mentions in 1 episode Perceptual Ad Blocker is described as a Chrome tool that detects ads and places an overlay over them. Mentions 205: Grump-a-Lago Apr 17, 2017 13:43 all it does is put, like, a semi-transparent overlay over the ad 14:16 they decided to call it perceptual ad blocker