Here are the points for the Google Chrome:-

1.Firstly you find an extension called Facebook  Unfriend Finder.

2.Once it is installed you will get an ‘Unfriend’ option below the ‘Friends’ option in your Facebook  Account.

Follow these steps to install it :-

1. Go to settings.

2.Then go to extensions option.

3.Click on Get more Extensions.

4.Type in search bar ‘Facebook Unfriend Finder’.

5.Then click on Add To Chrome.

6.Enjoy it.