Fx 136: Skript SaveTo.uc.js Popup-Menü kann nicht mehr gescrollt werden.

// ==UserScript==
// @include       chrome://mozapps/content/downloads/unknownContentType.xhtml
// @charset       UTF-8
// @version       Fx104+
// ==/UserScript==
(function () {
  const { FileUtils } = ChromeUtils.importESModule( 'resource://gre/modules/FileUtils.sys.mjs');
  const { HelperAppDlg } = ChromeUtils.importESModule( 'resource://gre/modules/HelperAppDlg.sys.mjs');

  setTimeout(function () {
    saveTo();
  }, 200);

  function saveTo() {
   // Config
   const dirArray = [
   ['F:\\Users\\bege\\Desktop', 'Desktop'],
   ['F:\\Downloads', 'Downloads'],
   ['F:\\Eigene Dateien\\Eigene Bilder\\Symbole', 'Symbole'],
   ['F:\\Users\\bege\\AppData\\Roaming\\Mozilla\\Firefox\\icons', 'Firefox\\Icons'],
   ['F:\\Setups\\Audio-Video', 'Setups\\Audio-Video'],
   ['F:\\Setups\\Dateiverwaltung', 'Setups\\Dateiverwaltung'],
   ['F:\\Setups\\Dateiverwaltung\\FreeCommander', 'Setups_FreeCommander'],
   ['F:\\Setups\\Editoren', 'Setups\\Editoren'],
   ['F:\\Setups\\Editoren\\Notepad++', 'Setups\\Notepad++'],
   ['F:\\Setups\\Grafik', 'Setups\\Grafik'],
   ['F:\\Setups\\Internet', 'Setups\\Internet'],
   ['F:\\Setups\\Office\\LibreOffice', 'Setups_LibreOffice'],
   ['F:\\Setups\\Sicherheit\\KeePass', 'Setups\\Sicherheit\\KeePass'],
   ['F:\\Setups\\Tools', 'Setups\\Tools'],
   ['F:\\Setups\\Tools\\W10', 'Setups\\Tools\\W10'],
   ['F:\\Setups\\Wartung', 'Setups\\Wartung'],
   ['F:\\Setups\\Wartung\\System u. Hardware', 'Setups\\Wartung\\System, Hardw.'],
   ['F:\\Eigene Dateien\\Eigene Bilder\\aktuelleDownloads', 'Bilder'],
   ['F:\\Eigene Dateien\\Eigene Musik\\aktuelleDownloads', 'Musik'],
   ['F:\\Eigene Dateien\\Eigene Videos\\aktuelleDownloads', 'Videos'],
   [FileUtils.getDir('UChrm', []).path, 'chrome'],
   [FileUtils.getDir('UChrm', ['CSS']).path, 'CSS'],
   [FileUtils.getDir('UChrm', ['JS']).path, 'JS'],
/*    ['C:\\', 'C:'],
   ['E:\\', 'E:'],
   ['F:\\', 'F:'],
   ['S:\\', 'S:']
 */   ];
   const button = document.getElementById('unknownContentType').getButton('cancel');
   const saveTo = button.parentNode.insertBefore(document.createXULElement('button'), button);
   const saveToMenu = saveTo.appendChild(document.createXULElement('menupopup'));

   saveTo.classList.toggle('dialog-button');
   saveTo.label = 'Speichern in…';
   saveTo.type = 'menu';

   const css =`
   @-moz-document url(chrome://mozapps/content/downloads/unknownContentType.xhtml) {

      scrollbox[orient="vertical"]  {
      max-height: 300px !important;
      overflow: auto !important;
      }
   }
      hbox.dialog-button-box button.dialog-button menupopup {
        // color: white !important;
        background: #eeeeee !important;
      }
      hbox.dialog-button-box button.dialog-button menupopup menuitem.menuitem-iconic {
         padding-left: 8px !important;
      }
      hbox.dialog-button-box button.dialog-button menupopup menuitem.menuitem-iconic:hover {
        background: red !important;
        // color: white !important;
      }
      //hbox.dialog-button-box button.dialog-button menupopup menuitem.menuitem-iconic hbox.menu-iconic-left {
      //  transform: scale(.5) !important;
	     //max-height: 20px !important;
      //}
      hbox.dialog-button-box button.dialog-button menupopup menuitem.menuitem-iconic label.menu-iconic-text {
        padding-right: 8px !important;
        padding-left: 8px !important;
        color: black !important;
      }
      //hbox.dialog-button-box button.dialog-button menupopup menuitem.menuitem-iconic hbox.menu-accel-container {
	     //max-height: 18px !important;
      //}
    `;

   const sss = Cc['@mozilla.org/content/style-sheet-service;1'].getService(Ci.nsIStyleSheetService);
   const uri = Services.io.newURI('data:text/css,' + encodeURIComponent(css));
   sss.loadAndRegisterSheet(uri, sss.AGENT_SHEET);

   dirArray.forEach(function (directory) {
     const [name, dir] = [directory[1], directory[0]];
     const mi = document.createXULElement('menuitem');
     const item = saveToMenu.appendChild(mi);
     item.setAttribute('label', (name || (dir.match(/[^\\/]+$/) || [dir])[0]));
     item.setAttribute('image', 'moz-icon:file:///' + dir + '\\');
     item.setAttribute('class', 'menuitem-iconic');
     item.addEventListener('command', function () {
       const locationtext = document.getElementById('locationtext');
       const pathFile = dir + '\\' + (locationtext ? locationtext.value : document.getElementById('location').value);
       const file = new FileUtils.File(pathFile);
       dialog.mLauncher.saveDestinationAvailable(file);
       dialog.onCancel = function () {};
       close();
    });
   });
  }
}());