One day, you log into Facebook and you see that your friend count is less than you remembered. You go through your friends and realize that you have too many to figure out who is missing. My guess is that this missing friend isn’t very important if you can’t figure out who it is. But for the people out there who really must know, there is a solution.
Step 1: Download Google Chrome
Step 2: Go to the Unfriend Notify for Facebook App.
Step 3: Click the “Free” button in the top right corner of the pop-up window to install it. Make sure you are logged into Facebook while you do this. Also make sure you are logged into your google account.
Step 4: Go to your Facebook profile page and click on your friends list. Right next to “friends,” you will now see “lost friends.” The App will track and update your friends list every time you log in. If there is a friend missing, you will see him or her under “lost friends.”
Understand that “lost friends” are not just friends that deleted you. These people may have temporarily deactivated their accounts or deleted their Facebook.