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');
    }

    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;

if(setMaxBitrate) {
  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);
}