When you notice your number of Facebook friends is decreasing, finding out who deleted you as a friend isn't easy. Through Facebook, the only way is to inventory your friends to determine who is missing -- if you have hundreds of Facebook friends, as many people do, it's extremely difficult to find who is missing. Grease Monkey has a free add-on that can help, although it only works in the Firefox, Google Chrome, Safari and Opera Web browsers.
Firefox
Step 1
Navigate to the Firefox Grease Monkey add-on website.
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Step 2
Click "Add to Firefox."
Step 3
Click "Install Now," then close and restart Firefox.
Step 4
Open Facebook, and click on the Unfriend Finder logo, which looks like an outline of a person's head and shoulders with a "-1" to the side. Click "Install." Restart Facebook, log in and look for "Unfriends" under the "Notifications" icon on the top left of your home page. Click on "Unfriends" to see a list of people who have deleted you as a friend or deactivated their accounts.
Google Chrome
Step 1
Open Chrome. Under "Tools," choose "Extensions." Browse for "Unfriend Finder," and click on "Continue."
Step 2
Click "Install." Close and restart Chrome.
Step 3
Open Facebook, and click on the Unfriend Finder logo, which looks like an outline of a person's head and shoulders with a "-1" to the side. Click "Install." Restart Facebook, log in and look for "Unfriends" under the "Notifications" icon on the top left of your home page. Click on "Unfriends" to see a list of people who have deleted you as a friend or deactivated their accounts.
Safari
Step 1
Open Safari. Navigate to the Safari NinjaKit extension website. This should automatically install the extension.
Step 2
Go to the User Scripts installation website and search for "Unfriend Finder." Click on the link, then click "Install."
Step 3
Close and restart Safari.
Step 4
Open Facebook, and click on the Unfriend Finder logo, which looks like an outline of a person's head and shoulders with a "-1" to the side. Click "Install." Restart Facebook, log in and look for "Unfriends" under the "Notifications" icon on the top left of your home page. Click on "Unfriends" to see a list of people who have deleted you as a friend or deactivated their accounts.
Opera
Step 1
Open Opera. Navigate to the User Scripts website and search for "Unfriend Finder." Choose "Download." Save the file on your hard drive to the "UserScripts" folder.
Step 2
Go to Opera's "Tools" menu and choose "Preferences." Under the "Advanced" tab, choose "JavaScript Options. Browse to the correct folder, most likely "C:\UserScripts." Click OK.
Step 3
Close and restart Opera.
Step 4
Open Facebook, and click on the Unfriend Finder logo, which looks like an outline of a person's head and shoulders with a "-1" to the side. Click "Install." Restart Facebook, log in and look for "Unfriends" under the "Notifications" icon on the top left of your home page. Click on "Unfriends" to see a list of people who have deleted you as a friend or deactivated their accounts.