It shows the other websites that are feeding info to FB. Worth a look. Be prepared to have to click through several pages in order to turn it off.
Wow. Its shocking. I don't really use FB. I have an account just to manage a page but have no friends. 
I'm shocked to see that even my BANK is sharing info with FB. There are other services that I don't even know how they link my account to my FB account but they did it some how.
I'll just save people some time.. hopefully this link takes you right too it. It was embedded in the article. It should be a big link right at the top.
I had quite the opposite reaction. Facebook only had 20 apps that knew about my activity, but I've tried to contain it as much as I can over the years, too. Firefox's tools have certainly helped with that---it looks like the only information was from my phone's usage.
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