updated 5/26/2021
Many Facebook users have many followers or friends, and over time some choose to unfriend us. That's just the way it goes. For those who only have only a few hundred friends, losing someone should be easy enough to spot without putting much thought into it. For those whose friends number in the thousands then you should right away add this google extension to your browser and let this clever little extension work its magic.
You must be logged into Facebook and then add who deleted me extension to your browser > Who Deleted Me
You must be logged into Facebook and then add who deleted me extension to your browser > Who Deleted Me
Up towards the right, click the button that reads Current Friends, then scroll down to the bottom of the page. Since Facebook no longer shows you the number of friends that you have, it's easy to see from here. Each page shows you a list of 10 persons, so in your head, you can quickly figure your friend count by multiplying 10x the number of pages.
So, at long last, there is a quick way of finding out who unfriended you and when.
This is by far my most popular post with over 30,000 views and is from its original form a complete re-write