netflix_max_bitrate.js

let getElementByXPath = function (xpath) {
  return document.evaluate(
    xpath,
    document,
    null,
    XPathResult.FIRST_ORDERED_NODE_TYPE,
    null
  ).singleNodeValue;
};

let fn = function () {
  window.dispatchEvent(
    new KeyboardEvent("keydown", {
      keyCode: 83,
      ctrlKey: true,
      altKey: true,
      shiftKey: true,
    })
  );

  const VIDEO_SELECT = getElementByXPath("//div[text()='Video Bitrate']");
  const AUDIO_SELECT = getElementByXPath("//div[text()='Audio Bitrate']");
  const BUTTON = getElementByXPath("//button[text()='Override']");

  if (!(VIDEO_SELECT && AUDIO_SELECT && BUTTON)) {
    return false;
  }

  [VIDEO_SELECT, AUDIO_SELECT].forEach(function (el) {
    let parent = el.parentElement;

    let options = parent.querySelectorAll("select > option");

    for (var i = 0; i < options.length - 1; i++) {
      options[i].removeAttribute("selected");
    }

    console.log(options[options.length - 1])

    options[options.length - 1].setAttribute("selected", "selected");
  });

  BUTTON.click();

  return true;
};

let run = function () {
  fn() || setTimeout(run, 100);
};

const WATCH_REGEXP = /netflix.com\/watch\/.*/;

let oldLocation;

console.log("netflix_max_bitrate.js enabled");
setInterval(function () {
  let newLocation = window.location.toString();

  if (newLocation !== oldLocation) {
    oldLocation = newLocation;
    WATCH_REGEXP.test(newLocation) && run();
  }
}, 500);