download.js

document.querySelectorAll('.icon-download').forEach((v, idx) => {
  setTimeout(() => {
    let e = document.createElement('a');
    e.href = v.parentNode.href;
    e.target = '_blank';
    document.body.appendChild(e);
    e.click();
  }, (Math.random() * 1000 + 500) * idx);
});