Let鈥檚 address the burning question immediately:

"Viewer" apps can install spyware that monitors your keystrokes or hijacks your account .

: Occasionally, older public versions of a profile or information from other linked social media accounts (Instagram, Twitter) might appear in search results. How to Find a Profile Link (URL)

Regardless of intent, Facebook鈥檚 security architecture is robust. Unlike 10 years ago, you cannot simply view HTML source code or use a 鈥淔acebook profile view secret link鈥� to see hidden content.

Facebook introduced the profile locking feature to give users more control over who can see their profile information. When a user locks their profile, it restricts access to their profile and timeline, making it harder for people to see their information if they're not friends or followers.