You’ve probably noticed that often when you click a friend’s shared link on Facebook that the link often redirects to a "social reader" app that you then have to install to read the story. Sometimes clicking cancel will take you to the story anyway but mostly not. These “apps” are a pain in the behind and are part of that whole tracking, auto-sharing BS where they access your personal information and post on your timeline.
If you’re using Chrome or Firefox as your browser (please don’t tell me you’re still on IE!), then there’s an extension to circumvent that. Unsocialize provides a right-click menu item to allow you to jump straight to the item being shared and bypass the installer or tracking metrics.