Facebook closed off the slurping of all your friends from the API with the app, and only shows those that have the same app. https://techcrunch.com/2015/04/28/

Facebook closed off the slurping of all your friends from the API with the app, and only shows those that have the same app. https://techcrunch.com/2015/04/28/facebook-api-shut-down/ https://techcrunch.com/2015/04/28/facebook-api-shut-down/