(() => {
  // navigator.webdriver
  Object.defineProperty(navigator, 'webdriver', { get: () => undefined });
  // languages
  Object.defineProperty(navigator, 'languages', { get: () => [{{.Languages}}] });
  // navigator.platform
  Object.defineProperty(navigator, 'platform', { get: () => '{{.Platform}}' });
  // plugins (non-empty)
  Object.defineProperty(navigator, 'plugins', { get: () => [1, 2, 3, 4, 5] });
  // chrome runtime stub
  window.chrome = window.chrome || { runtime: {} };
  // permissions query consistency
  const origQuery = window.navigator.permissions && window.navigator.permissions.query;
  if (origQuery) {
    window.navigator.permissions.query = (params) =>
      params && params.name === 'notifications'
        ? Promise.resolve({ state: Notification.permission })
        : origQuery(params);
  }
  // WebGL vendor/renderer spoof
  const getParam = WebGLRenderingContext.prototype.getParameter;
  WebGLRenderingContext.prototype.getParameter = function (p) {
    if (p === 37445) return '{{.WebGLVendor}}';   // UNMASKED_VENDOR_WEBGL
    if (p === 37446) return '{{.WebGLRenderer}}'; // UNMASKED_RENDERER_WEBGL
    return getParam.call(this, p);
  };
})();