Because these extensions rely on flawed scraping logic, they often send false positives. You will receive an alert saying "John Smith unfriended you," when in reality, John simply deactivated his account because his phone died, or Facebook had a temporary glitch. This leads to unnecessary paranoia and broken real-world friendships.
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Facebook deliberately omits a notification for this action. The logic is sound from a user-retention perspective: informing a user that they have been "rejected" creates a negative user experience. It encourages retaliation, confrontation, and "unfriending" wars. By making the process invisible, Facebook allows relationships to fade quietly. chrome web store - unfriend notify for facebook
: Users of related "premium" versions have complained that "notifications" often turn out to be intrusive pop-up ads. Privacy & Security Concerns Because these extensions rely on flawed scraping logic,