Any site or browser extension claiming to offer this feature is considered a scam. These tools are often "honeypots" designed to harvest your login credentials or infect your device with malware. Legitimate Ways to Track Activity
This paranoia stems from other platforms. LinkedIn, for example, has a "Who’s Viewed Your Profile" feature. Instagram previously allowed users to see when friends viewed their Close Friends stories. Because Facebook owns Instagram, users assume the parent company has a similar feature hidden in the code. anonymous facebook profile viewer