The best rule of thumb for the internet applies here: Stay safe, respect others' privacy settings, and avoid third-party "hacking" tools.
On certain devices, it prevents others from taking a screenshot of your profile picture. private facebook profile picture viewer
Some tools ask you to log in with your own Facebook credentials to "authenticate" the search. These sites are designed to steal your login info, giving hackers full access to your account, messages, and personal data. 3. Malware and Browser Extensions The best rule of thumb for the internet
The most effective (and ethical) way to see someone’s profile is simply to send a friend request . How to Protect Your Own Profile Picture respect others' privacy settings