facebook_friend_checker.js

var items = document.querySelectorAll('.fsl.fwb.fcb');

var names = Array.prototype.slice.call(items).map(function(item){
  return item.textContent;
}).sort(function(a,b){
  if (a < b) {
    return -1;
  } else {
    return 1;
  }
})

var toString = names.join('\n');

copy(toString)