Wie erreiche ich es, dass heruntergeladene Dateien in der Fußleiste angezeigt werden?

// ==UserScript==
// @name           ucjsDownloadsStatusModoki.uc.js
// @namespace      http://space.geocities.yahoo.co.jp/gl/alice0775
// @description    Downloads Status Modoki
// @include        main
// @compatibility  Firefox 73+
// @author         Alice0775
// @note           ucjsDownloadsStatusModoki.uc.js.css をuserChrome.cssに読み込ませる必要あり
// @version       2019/12/11 fix for 73 Bug 1601094 - Rename remaining .xul files to .xhtml in browser
// @version        2019/10/20 12:30 workaround Bug 1497200: Apply Meta CSP to about:downloads, Bug 1513325 - Remove textbox binding
// @version        2019/09/08 19:30 fix scrollbox
// @version        2019/05/21 08:30 fix 69.0a1 Bug 1551320 - Replace all createElement calls in XUL documents with createXULElement
// @version        2018/10/27 12:00 fix for 64+
// @version        2018/06/12 21:00 fix for private window mode
// @version        2018/06/07 12:00 fix file name for history
// @version        2018/02/10 12:00 try catch error when DO_NOT_DELETE_HISTORY = true
// @version        2017/12/10 12:00 fix error when DO_NOT_DELETE_HISTORY = true
// @version        2017/12/10 12:00 remove workaround Bug 1279329. Disable btn while clear list is doing, close button styling for 57.
// @version        2016/06/10 12:00 modify style independent of font-family
// @version        2016/06/10 07:00 modify style of close button, fix typo
// @version        2016/06/10 00:00 Workaround Bug 1279329. adjust some padding
// @version        2015/05/08 00:00 remove padding due to Bug 1160734
// @version        2014/03/31 00:00 fix for browser.download.manager.showWhenStarting
// @version        2013/12/22 13:00 chromehidden
// @version        2013/12/19 17:10 rename REMEMBERHISTOTY to DO_NOT_DELETE_HISTORY
// @version        2013/12/16 23:28 fixed initialize numDls
// @version        2013/12/16 23:24 open only download added
// @version        2013/12/16 23:10 open only download started
// @version        2013/12/16 21:20 modify css Windows7 Aero
// @version        2013/12/16 21:00 modify css
// @version        2013/12/16 19:30 add autocheck false
// @version        2013/12/16 18:31 fix pref name
// @version        2013/12/16 18:30
// @note
// ==/UserScript== 

var ucjsDownloadsStatusModoki = {
  _summary: null,
  _list: null,

  get downloadsStatusModokiBar() {
    delete downloadsStatusModokiBar;
    return this.downloadsStatusModokiBar = document.getElementById("downloadsStatusModokiBar");
  },

  get toggleMenuitem() {
    delete toggleMenuitem;
    return this.toggleMenuitem = document.getElementById("toggle_downloadsStatusModokiBar");
  },

  init: function() {
    if (document.documentElement.getAttribute("chromehidden") !="" )
      return;

    XPCOMUtils.defineLazyModuleGetter(window, "Downloads",
              "resource://gre/modules/Downloads.jsm");

    var style = ` 
      @namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul); 
      #ucjsDownloadsStatusModoki { 
        -moz-box-orient: horizontal; 
        width: 485px !important; 
        min-width: 485px !important; 
        max-width: 485px !important; 
        max-height: 100px !important; 
        height: 28px !important;
        background-color: rgba(0,0,0,0) !important;
        margin-top: -28px !important; 
      } 
     `.replace(/\s+/g, " ");
    var sspi = document.createProcessingInstruction(
      'xml-stylesheet',
      'type="text/css" href="data:text/css,' + encodeURIComponent(style) + '"'
    );
    document.insertBefore(sspi, document.documentElement);
    sspi.getAttribute = function(name) {
      return document.documentElement.getAttribute(name);
    };


    var toolbar = document.createXULElement("vbox");
    toolbar.setAttribute("id", "downloadsStatusModokiBar");
    toolbar.setAttribute("collapsed", true);

    var bottombox = document.getElementById("main-window");
    bottombox.appendChild(toolbar);
    var browser = toolbar.appendChild(document.createXULElement("browser"));
    browser.setAttribute("disablehistory", true);
    browser.setAttribute("remote", false);
    browser.setAttribute("id", "ucjsDownloadsStatusModoki");
    browser.addEventListener("load", function(event){ucjsDownloadsStatusModoki.onload(event)}, true);
    browser.setAttribute("src", "chrome://browser/content/downloads/contentAreaDownloadsView.xhtml?StatusModoki");
    var menuitem = document.createXULElement("menuitem");
    menuitem.setAttribute("id", "toggle_downloadsStatusModokiBar");
    menuitem.setAttribute("type", "checkbox");
    menuitem.setAttribute("autocheck", false);
    menuitem.setAttribute("label", "Downloads Status Modoki Bar");
    menuitem.setAttribute("checked", false);
    menuitem.setAttribute("accesskey", "D");
    menuitem.setAttribute("oncommand", "ucjsDownloadsStatusModoki.toggleDownloadsStatusModokiBar()");
    var ref = document.getElementById("menu_customizeToolbars");
    ref.parentNode.insertBefore(menuitem, ref.previousSibling);

    // Ensure that the DownloadSummary object will be created asynchronously.
    if (!this._summary) {
      Downloads.getSummary(Downloads.ALL).then(summary => {
        this._summary = summary;
        return this._summary.addView(this);
      }).then(null, Cu.reportError);
    }
    if (!this._list) {
      Downloads.getList(Downloads.ALL).then(list => {
        this._list = list;
        return this._list.addView(this);
      }).then(null, Cu.reportError);
    }

    window.addEventListener("unload", this, false);
  },

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

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

  toggleDownloadsStatusModokiBar: function() {
    var collapsed = this.downloadsStatusModokiBar.collapsed;
    this.downloadsStatusModokiBar.collapsed = !collapsed;
    this.toggleMenuitem.setAttribute("checked", collapsed);
  },

  openDownloadsStatusModoki: function() {
    this.downloadsStatusModokiBar.collapsed = false;
    this.toggleMenuitem.setAttribute("checked", true);
  },

  hideDownloadsStatusModoki: function() {
    this.downloadsStatusModokiBar.collapsed = true;
    this.toggleMenuitem.setAttribute("checked", false);
  },

  onDownloadAdded: function (aDownload) {
    Cu.import("resource://gre/modules/Services.jsm");
    var showWhenStarting = true;
    try {
      showWhenStarting = Services.prefs.getBoolPref("userChrome.downloadsStatusModoki.showWhenStarting");
    } catch(e) {}
    this.numDls = 0;
    if (showWhenStarting) {
      if (this._list) {
        this._list.getAll().then(downloads => {
          for (let download of downloads) {
            if (!download.stopped)
              this.numDls++;
          }
          if (this.numDls > 0)
            this.openDownloadsStatusModoki(false);
        }).then(null, Cu.reportError);
      }
    }
  },

  onSummaryChanged: function () {
    Cu.import("resource://gre/modules/Services.jsm");
    if (!this._summary)
      return;
    if (this._summary.allHaveStopped || this._summary.progressTotalBytes == 0) {
      var closeWhenDone = true;
      try {
        closeWhenDone = Services.prefs.getBoolPref("userChrome.downloadsStatusModoki.closeWhenDone");
      } catch(e) {}
      if (closeWhenDone) {
        this.hideDownloadsStatusModoki();
      }
    }
  },



  // chrome://browser/content/downloads/contentAreaDownloadsView.xhtml
  onload: function(event) {
    var doc = event.originalTarget;
    var win = doc.defaultView;
    doc.documentElement.setAttribute("ucjsDownloadsStatusModoki", "true");

    var button = doc.createXULElement("button");
    button.setAttribute("label", "Löschen");
    button.setAttribute("id", "ucjs_clearListButton");
    button.setAttribute("accesskey", "L");
    var ref = doc.getElementById("downloadCommands");
    var vbox = doc.createXULElement("vbox");
    var box = vbox.appendChild(doc.createXULElement("hbox"));
    box.appendChild(button);
    box.appendChild(doc.createXULElement("spacer")).setAttribute("flex", 1);
    var textbox = doc.createElementNS("http://www.w3.org/1999/xhtml", "input");
    textbox.setAttribute("id", "downloadFilter");
    textbox.setAttribute("clickSelectsAll", true);
    textbox.setAttribute("type", "search");
    textbox.setAttribute("placeholder", "Suche...");
    box.appendChild(textbox);
    var closebtn = doc.createXULElement("toolbarbutton");
    closebtn.setAttribute("id", "ucjsDownloadsStatusModoki-closebutton");
    closebtn.setAttribute("class", "close-icon");
    closebtn.setAttribute("tooltiptext", "Close this bar");
    box.appendChild(closebtn);
    ref.parentNode.insertBefore(vbox, ref);
    doc.getElementById("ucjs_clearListButton").addEventListener("command", function(event) {
        win.ucjsDownloadsStatusModoki_clearDownloads();
      });
    doc.getElementById("downloadFilter")
            .addEventListener("input", function(event) {
        win.ucjsDownloadsStatusModoki_doSearch(event.target.value);
      });
    doc.getElementById("ucjsDownloadsStatusModoki-closebutton")
            .addEventListener("command", function(event) {
        win.ucjsDownloadsStatusModoki_doClose();
      });
    
/*
    // xxx Bug 1279329 "Copy Download Link" of context menu in Library is grayed out
    var listBox = doc.getElementById("downloadsRichListBox");
    var placesView = listBox._placesView;
    if (placesView) {
      var place = placesView.place;
      placesView.place= null;
      placesView.place = place;
    }
*/
    win.ucjsDownloadsStatusModoki_clearDownloads = function ucjs_clearDownloads() {
      var DO_NOT_DELETE_HISTORY = true; /* customizeable true or false */
      var richListBox = doc.getElementById("downloadsRichListBox");

      Cu.import("resource://gre/modules/Services.jsm");
      var places = [];
      function addPlace(aURI, aTitle, aVisitDate) {
        places.push({
          uri: aURI,
          title: aTitle,
          visits: [{
            visitDate: (aVisitDate || Date.now()) * 1000,
            transitionType: Ci.nsINavHistoryService.TRANSITION_LINK
          }]
        });
      }
      function moveDownloads2History() {
        if (DO_NOT_DELETE_HISTORY &&
            !PrivateBrowsingUtils.isWindowPrivate(window)) {
          try {
            for (let element of richListBox.childNodes) {
              let download = element._shell.download;
              let aURI = makeURI(download.source.url);
              // let aTitle = document.getAnonymousElementByAttribute(element, "class", "downloadTarget").value
              let aTitle = download.target.path;
              aTitle = aTitle.match( /[^\\]+$/i )[0];
              aTitle = aTitle.match( /[^/]+$/i )[0];

              let aVisitDate = download.endTime || download.startTime;
              addPlace(aURI, aTitle, aVisitDate)
            }
          } catch(ex) {}
        }

        // Clear List
        richListBox._placesView.doCommand('downloadsCmd_clearDownloads');

        if (DO_NOT_DELETE_HISTORY &&
            !PrivateBrowsingUtils.isWindowPrivate(window)) {
          try {
            if (places.length > 0) {
              var asyncHistory = Components.classes["@mozilla.org/browser/history;1"]
                       .getService(Components.interfaces.mozIAsyncHistory);
                asyncHistory.updatePlaces(places);
            }
          } catch(ex) {}
        }
      }
      var btn = doc.getElementById("ucjs_clearListButton");
      btn.setAttribute("disabled", true);
      moveDownloads2History();
      btn.removeAttribute("disabled");

      // close toolbar
      var closeWhenDone = false;
      try {
        closeWhenDone = Services.prefs.getBoolPref("userChrome.downloadsStatusModoki.closeWhenDone");
      } catch(e) {}
      if (closeWhenDone) {
        top.ucjsDownloadsStatusModoki.hideDownloadsStatusModoki();
      }
    };

    win.ucjsDownloadsStatusModoki_doSearch = function ucjs_doSearch(filterString) {
      var richListBox = doc.getElementById("downloadsRichListBox");
      richListBox._placesView.searchTerm = filterString;
    };

    win.ucjsDownloadsStatusModoki_doClose = function ucjs_doClose() {
      top.ucjsDownloadsStatusModoki.hideDownloadsStatusModoki();
    };

  }

}
ucjsDownloadsStatusModoki.init();