X.O.
You can go into the Apps setting of FB and update which apps you have authorized to post as you on FB. I NEVER access apps via FB, because I don't want to have to go through all the BS of granting/revoking permission, and once upon a time an app I had approved changed company names, and then I couldn't get rid of it on FB and it kept spamming M. and had all my personal information that I had put in FB.
I learned my lesson--I never click links that my friends post if they are apps. I put very minimal personal info in, and read the Terms of Service for EVERYTHING pertaining to FB.