fb-add-friend script

gistfile1.js

function findElementsWithText(text) {
  let elements = [];
  let iterator = document.evaluate('//*[contains(text(), "' + text + '")]', document, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);
  let thisNode = iterator.iterateNext();
  
  while (thisNode) {
    elements.push(thisNode);
    thisNode = iterator.iterateNext();
  }
  
  return elements;
}
function findParent(element, selector) {
  let parent = element.closest(selector);
  
  if (!parent) {
    parent = element.parentElement;
    if (parent) {
      parent = parent.parentElement;
      if (parent) {
        parent = parent.parentElement;
      }
    }
  }
  
  return parent;
}
function clickOnElements(elements, delay) {
  let i = 0;
  
  function next() {
    if (i < elements.length) {
      elements[i].click();
      i++;
      setTimeout(next, delay);
    }
  }
  
  next();
}
let elements = findElementsWithText('Add friend');
let parents = elements.map(element => findParent(element, 'div.x1n2onr6.x1ja2u2z.x78zum5.x2lah0s.xl56j7k.x6s0dn4.xozqiw3.x1q0g3np.xi112ho.x17zwfj4.x585lrc.x1403ito.x972fbf.xcfux6l.x1qhh985.xm0m39n.x9f619.xn6708d.x1ye3gou.x1qhmfi1.x1r1pt67'));
clickOnElements(parents, 500);