Creepy new browser-tracking technique means there's nowhere left for you to hide

These days, everyone on the internet already knows if you're a dog. Thanks to a newly developed tracking technique, they may soon know even more. 

Pennsylvania-based computer science professor Yinzhi Cao just unveiled a method that IEEE Spectrum reports makes "fingerprinting" across multiple web browsers possible — with a striking degree of accuracy. That means anyone looking to follow you around the internet — advertisers, credit card companies, or websites — can now do so even if you habitually switch from Firefox to Chrome to Safari.