3 links have been added on this idea.
  1. “Facebook released a tool that lets people see how it tracks their “off-Facebook activity.” AHH SO YOU JUST TOLD FACEBOOK YOU ARE TRYING TO SPY BACK – GREAT. GOOD LUCK WITH THAT.

  2. There are some apps, but they are very limited – fact is, Facebook doesn’t let them know ALL the stuff it gathers about your browsing habits, so no app or plugin could really do it.

  3. That would be great, especially if it allowed you to delete info you don’t want it to know. For now there is this… https://www.alphr.com/facebook/1003521/see-everything-facebook-knows-about-you-here-s-how/