It appears that the official chrome webstore extension by Rob W is outdated. It was last updated in 2019. 

const webPrefsKeys = Object.keys(webPrefs);
  webPrefsKeys.sort();
  if (webPrefsKeys.length !== chromePrefsKeys.length) {
    console.log("Warning: Pref objects doesn't have the same length.");
    return false;
  }
  let ret = true;
  for (let i = 0, ii = webPrefsKeys.length; i < ii; i++) {
    const value = webPrefsKeys[i];
    if (chromePrefsKeys[i] !== value) {
      ret = false;
      console.log(
        `Warning: not the same keys: ${chromePrefsKeys[i]} !== ${value}`
      );
    } else if (chromePrefs.properties[value].default !== webPrefs[value]) {
      ret = false;
      console.log(
        `Warning: not the same values (for "${value}"): ` +
          `${chromePrefs.properties[value].default} !== ${webPrefs[value]}`
      );
    }
  }
  return ret;
}
function replaceWebpackRequire() {
  
  
  return replace("__webpack_require__", "__w_pdfjs_require__");
}
function replaceNonWebpackImport() {