(for Facebook™) Group Invite All Friends 2016 - Chrome Web Store

1.   open chrome browser if no please install

2.   go on given link

3.   click on ADD TO CHROME 

4.  wait just 5 seconds & then it will appear & then you have to click on add extension 

5.  go in group home page & click on given icon in pic

adding will be started, but here adding limit is only 500 at once. add 500 & wait a minute then add 500 & wait. like this you can add your all friends in group.

if any problem appearing comment down.