Facebook’s “Like” buttons have been logging data on our browsing for years – now the company will start using that data to target ads.
Unsupported browser: Your browser does not meet modern web standards. See how it scores »
You're automatically an Insider. It's easy to activate or upgrade your account.Activate Your Account
It's the new way to subscribe. Get even more of the tech news, research, and discoveries you crave.Sign Up
Find out why MIT Technology Review Insider is for you and explore your options.Show Me