6 ms·

How can one protect himself against this?

• fixermark 8y ago
  To a first approximation: you can install browser extensions (or modify your /etc/hosts file or a router up-the-chain from your device) to re-route requests to Facebook URLs / IP addresses to a black hole. To a larger approximation: if a third-party chooses to share their information on your browsing habits with Facebook, that's not something you can control. But it's probably a much rarer, much smaller attack surface.