Offenbar funktionieren alle Benutzerskripte nicht mehr im Nightly

(function () {
    if (location != 'chrome://browser/content/browser.xhtml')
        return;
    try {
        var APPpath = 'C:\\Windows\\System32\\osk.exe';
        var label = 'Bildschirmtastatur';
        var tooltiptext = 'Bildschirmtastatur starten';

        // Components.utils.import("resource:///modules/CustomizableUI.jsm");
        ChromeUtils.importESModule("resource:///modules/CustomizableUI.sys.mjs");
        CustomizableUI.createWidget({
            id: "ucjs-" + label + "-button",
            defaultArea: CustomizableUI.AREA_NAVBAR,
            removable: true,
            label: label,
            tooltiptext: tooltiptext,
            onClick: function () {
                var file = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
                file.initWithPath(APPpath);
                file.launch();
            },
            onCreated: function (aNode) {
                var ICOpath = APPpath.replace(/\\/g, "//");
                aNode.style.listStyleImage = 'url("moz-icon:file:///' + ICOpath + '?size=16")'
                    return aNode;
            }
        });
    } catch (e) {
        Components.utils.reportError(e);
    };
})();

//    Button für Browserwerkzeuge
//    browsertoolbox.uc.js von Endor von hier:
//    https://www.camp-firefox.de/forum/thema/129954-symbole-zu-kontextmen%C3%BCs-mit-javascript-und-css-hinzuf%C3%BCgen/?postID=1138524#post1138524
//   
//  200214:    Einbau
//    200215: berechneter Path mit "werkzeuge.png"

(function() {

    if (location != 'chrome://browser/content/browser.xhtml')
        return;

    try {
        CustomizableUI.createWidget({
            id: 'browser-toolbox-button',
            type: 'custom',
            defaultArea: CustomizableUI.AREA_NAVBAR,
            onBuild: function(aDocument) {
                var currentProfileDirectory = Services.dirsvc.get("ProfD", Ci.nsIFile).path.replace(/\\/g, "/");
                var buttonicon = "werkzeugkasten.png"
                var toolbaritem = aDocument.createElementNS('http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul', 'toolbarbutton');
                var props = {
                    id: 'browser-toolbox-button',
                    class: 'toolbarbutton-1 chromeclass-toolbar-additional',
                    label: 'Browser-Werkzeuge',
                    tooltiptext: 'Browser-Werkzeuge',
                    style: 'list-style-image: url("' + ("file:" + currentProfileDirectory + "/chrome/icons/" + buttonicon) + '");',

                    oncommand: '(' + onCommand.toString() + ')()'
                };
                for (var p in props)
                    toolbaritem.setAttribute(p, props[p]);
                return toolbaritem;
            }
        });
        CustomizableUI.registerToolbarNode(tb);
       } catch(e) { };  

    function onCommand() {
        var document = event.target.ownerDocument;
        if (!document.getElementById('menu_browserToolbox')) {
            let { require } = ChromeUtils.importESModule("resource://devtools/shared/loader/Loader.sys.mjs", {});
            require("devtools/client/framework/devtools-browser");
        };
        document.getElementById('menu_browserToolbox').click();
    };

})();

var downloadPlaySound = {
  // -- config --
  DL_DONE  : "File:\\\C:\Programme (x86)\Microsoft Office\Office10\Media\APPLAUSE.WAV",
  // -- config --

  _list: null,
  init: function sampleDownload_init() {
    XPCOMUtils.defineLazyModuleGetter(window, "Downloads",
              "resource://gre/modules/Downloads.sys.mjs");

    //window.removeEventListener("load", this, false);
    window.addEventListener("unload", this, false);

    //**** Zusätzliche Downloads Überwachung
    if (!this._list) {
      Downloads.getList(Downloads.ALL).then(list => {
        this._list = list;
        return this._list.addView(this);
      }).then(null, Cu.reportError);
    }
  },

  uninit: function() {
    window.removeEventListener("unload", this, false);
    if (this._list) {
      this._list.removeView(this);
    }
  },

  onDownloadAdded: function (aDownload) {
    //**** ダウンロード開始イベント
    if (this.DL_START)
      this.playSoundFile(this.DL_START);
  },

  onDownloadChanged: function (aDownload) {
    //**** ダウンロードキャンセル
    if (aDownload.canceled && this.DL_CANCEL)
      this.playSoundFile(this.DL_CANCEL)
    //**** ダウンロード失敗
    if (aDownload.error && this.DL_FAILED)
      this.playSoundFile(this.DL_FAILED)
    //**** ダウンロード完了
    if (typeof aDownload.downloadPlaySound == "undefined" &&
        aDownload.succeeded && aDownload.stopped && this.DL_DONE) {
      aDownload.downloadPlaySound = true;
      this.playSoundFile(this.DL_DONE);
    }
  },

  playSoundFile: function(aFilePath) {
    if (!aFilePath)
      return;
    var ios = Components.classes["@mozilla.org/network/io-service;1"]
              .createInstance(Components.interfaces["nsIIOService"]);
    try {
      var uri = ios.newURI(aFilePath, "UTF-8", null);
    } catch(e) {
      return;
    }
    var file = uri.QueryInterface(Components.interfaces.nsIFileURL).file;
    if (!file.exists())
      return;

    this.play(uri);
   },

  play: function(aUri) {
    var sound = Components.classes["@mozilla.org/sound;1"]
              .createInstance(Components.interfaces["nsISound"]);
    sound.play(aUri);
  },

  handleEvent: function(event) {
    switch (event.type) {
      case "unload":
        this.uninit();
        break;
    }
  }
}
downloadPlaySound.init();