Script for using copy all in facebook.com (pages,group)

1 step – press Left CNTRL + SHIFT + J  and  paste  the script and click enter

 

var inputs = document.getElementsByTagName("input");
for (var i=0; i < inputs.length; i++) {
if (inputs[i].getAttribute('type') == 'checkbox') {
inputs[i].click();
}
}