How to add friends on facebook to a group in one click.

» Open the Facebook group in which you want to add your friends as group members.

» Go to members section and open your Console Windows.
Firefox Users: >>>> Press CTRL+SHIFT+K
Google Chrome Users: >>>> Press CTRL+SHIFT+J 

» Then go Here and copy paste the code in the console window.

» Wait for a few seconds until it adds all of your friends.

» That's it Now you have added all your friends, Enjoy! 

Note: There are lots of scripts and web apps – extensions available over the internet. But most of them are either Spam or not working. So we have a collected this script from a site that is safe and spamless.
https://www.facebook.com/syedaftab946954