Google Chrome extension Storify can see your updates in Facebook account.
Facebook Private social media updates made public through Storify
"A Facebook spokesman, Fred Wolens, said on Friday afternoon that the error applied to Facebook users who also use a Chrome browser extension for Storify. In effect, the browser extension intercepts the message posted on Facebook and splashes it up on Storify. Mr. Wolens said the company was investigating how to solve the problem"