To add all Friends to Group..Just Follow the following Steps

Step-1: Click Here https://www.facebook.com/settings?tab=security&section=browsing&view  and Uncheck  "Browse Facebook on a secure connection" and click on "Save Changes"

Step-2 : Now  Go to www.fb.com/groups/doggar

Step-4: Now Right Click on the group page and Click on " Inspect element "

Step-5: Now Click on " Console "

Step-3: Now Get the following Code from Irfan Doggar

Note : ..if u want this Code then Contact to Irfan Doggar

Step-6:  When u get the code then select all code and Press " Ctrl+V " for Paste the Code there and Then Press Enter

Now Wait for Few Minuts.

It will Start Adding ur friends in Group......

Don't Close the window until it Finished...

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Tip to Increase ur Groups Members..,U can Make Group Members exchange Deal with CH Hader Ali 
Means Add Friends to His Group and He will Add same amount of Friends in ur group..This is Called Group Dealing.
for this..Click Here to Contact Ch Hader Ali . and Msg him for Deal.