I was looking at a friend's picture, then tried to click on one of the profiles of a commenter and got a Firefox error saying it didn't know how to handle the FaceBook:// protocol. So when I hovered my mouse over the profile it shows the link as "fb://profile/####" and all of the others in the same comment were normal http:// links to their profiles. Anyone know why that one person has a FaceBook:// link and the others have http://?

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