[lnx01]

It's been around since the beginning of time itself I guess. You can try something like dnsmasq. One liner in the conf file: address=/.facebook.com/127.0.0.1

edit: For Ubuntu this should work (one versions from Trusty and newer):

sudo touch /etc/NetworkManager/dnsmasq.d/local

Put these lines into the above file and save:

  address=/.facebook.com/127.0.0.1
  address=/.fbcdn.net/127.0.0.1
  address=/.tfbnw.net/127.0.0.1
  address=/.whatsapp.com/127.0.0.1
  address=/.instagram.com/127.0.0.1
  address=/.fb.com/127.0.0.1
  address=/.edgesuite.net/127.0.0.1
  address=/.metrix.net/127.0.0.1
  address=/.fbsbx.com/127.0.0.1
  address=/.fbcdn.com/127.0.0.1
  address=/.facebook.net/127.0.0.1
  address=/.edgekey.net/127.0.0.1
  address=/.cdninstagram.com/127.0.0.1
  address=/.akamaihd.net/127.0.0.1
  address=/.fb.me/127.0.0.1
  address=/.appspot.com/127.0.0.1

And then: sudo systemctl restart network-manager