Hacker News Reader

This doesn't actually work. After allowing the popup, it just confirmed whatever username I put into the text box.

Same for me, but I also note that whatever I put in the dialog, I get redirected to my actual Facebook page.

Also, I had to allow popups.

https://www.facebook.com/profile.php always links to your actual Facebook page, so being redirected there doesn't mean the PoC is working.

I know I was implying it wasn't.