It works by storing a unique digital fingerprint for every photo found on these trusted sites. It also saves a signature of every photo you see while you browse with the extension installed.
Every time you use Facebook’s new Reaction emoji, you’re providing the company with a greater insight into your emotions. With this addition to Facebook’s data collection, advertisers can build a better profile to target you with ads. Facebook could even carry out more emotional manipulation experiments. But there is a new way to defeat this kind of surveillance with a browser extension called Go Rando by Benjamin Grosser. When you react to a post, it randomly chooses one of the six reactions. Over time, you’ll appear to have perfectly balanced views to Facebook’s algorithms. Benjamin has even open-sourced the extension, and you can install it for most popular browsers. You can find instructions on Benjamin’s blog.