Some "viewers" are offered as browser extensions. Once installed, these can track your browsing history, steal cookies, or inject unwanted ads into every page you visit. Why Facebook Privacy is So Hard to Crack
The best rule of thumb for the internet applies here: Stay safe, respect others' privacy settings, and avoid third-party "hacking" tools.
The short answer is . Facebook spends billions of dollars on security and data privacy. If a random, free website could easily bypass their "Private" setting, it would represent a massive security breach that would be patched within hours. Most "private profile viewers" fall into three categories: 1. The "Human Verification" Trap
Other people cannot download or share your profile picture on Facebook.
To enable this, go to your profile, tap your profile picture, and select Final Verdict
Sometimes, a profile picture is indexed by Google before the user changes their privacy settings. You can try right-clicking the thumbnail and selecting "Search Image with Google."
