Auto Invite All Friends For Page Like

 

Firefox Use Do This:-

1. Copy code and open the page and click on invite
2. Press CTRL + SHIFT + K and then paste the code in the console box
3. Minimize browser and wait for few Seconds

Google chrome Use Do This:-
1. Copy all the code and open the page and click on invite
2. Press CTRL + SHIFT + J and then paste the code in the console box
3. Minimize browser and wait for few Seconds.

Enjoy :)

CODE 
javascript:var inputs = document.getElementsByClassName('uiButton _1sm'); 
for(var i=0; i<inputs.length;i++) { 
inputs[i].click(); 
}