prefer-kindle-device.js

window.addEventListener("load", main, false);

function main(e) {
  const jsInitCheckTimer = setInterval(jsLoaded, 1000);
  function jsLoaded() {
    var t = document.querySelector(".ebookBuyboxDeliverToDropdown").children[1];
    if (t != null) {
      clearInterval(jsInitCheckTimer);
      var c = t.parentNode.children;
      for (var i = 0; i < c.length; i++) {
        if (c[i].label == "_iPad") {
          c[i].selected = true;
          document.querySelector(".a-dropdown-prompt").innerText = '_iPad';
        }
      }
    }
  }
}