Add all fiends in a Facebook Group with a single click

STEPS FOR GOOGLE CHROME
1). You will need Tampermonkey Extension for this.
Download it from below link??

2). After installing tampermonkey Install the JavaScript from the below link??

3). After installing both Extension and the script,goto Facebook group where you want to add all you friends and click on add all friends option just behind notification setting of group.
4). Finally wait for a minute and see how your friends are added one by one.
MUST READ: JAVASCRIPT FOR INVITING ALL FRIENDS IN A PAGE WITH A SINGLE CLICK