When you paste these into your browser, they do nothing but redirect you to a spam page or your own Facebook homepage. Why? Because the URL parameter cannot force Facebook to override its permission settings on the server side.
: Some tools trick users into installing malicious browser extensions or software that can hijack accounts, log keystrokes, and monitor activity. facebook private profile viewer free link
For a "Private Profile Viewer" link to work, it would need one of two things: When you paste these into your browser, they
How to View Facebook Profiles Without Revealing Your Identity : Some tools trick users into installing malicious
Back then, Facebook had a feature called "Preview my profile." It let you see how your page looked to the public. Hackers realized you could modify the URL parameter ?preview to view other people's profiles. Additionally, Facebook Profile ID enumeration allowed limited viewing of tagged photos.
You land on a page that looks exactly like a Facebook login screen. It says: "Facebook Private Viewer: Confirm your identity to continue."