: Facebook uses secure authentication tokens. If you aren't an approved friend, the server literally will not send the high-resolution photo data to your browser.
Websites often self-label as "verified" or "trusted" to gain credibility, but no such service is endorsed or authorized by Meta. The Architecture of a Scam facebook locked profile picture viewer online verified
: Some extensions on the Chrome Web Store claim to unlock pictures to Full HD, but they often receive poor ratings (e.g., 1.8/5) and may pose security risks. Legitimate Ways to View Content : Facebook uses secure authentication tokens