Eintrag in der Menüleiste / doDatClock.uc.js

(function() {
    function doDatClock() {
        var timestr = new Date().toLocaleDateString( locale , options );
                const blanks = '     ';
        let i = timestr.lastIndexOf(',');
        timestr = timestr.substring(0,i) + blanks + timestr.substring(i+1);

        if( count == 1 ) {
            var counter = new Date( 1000 * sec ).toISOString().substr( 11 , 8 ); // .replace(/^[0:]+/, '') // if you want to replace zeroes and colons
            timestr = timestr + ' (' + counter + ')';
            sec++;
        }
        ClockLabel.setAttribute( 'value', timestr );
    }
    
    var count = 0; // if you don't want a counter set this to zero
    var agent = 1; // if you just want the clock set this to zero
    var language = 'de-DE'; // locale, e.g. 'de-DE' , 'en-US' , 'fr-FR'
    var personalText = '  Nightly - alt  > Dieter Büssen <'; // your personal text here
    var cssColor = 'blue'; // Font Color

    var css = 'padding-top: 4px !important; padding-left: 0px; color: ' + cssColor + '; font-weight: 600; text-shadow: none; width: 275px; margin-right:42px;';
    var cssA = 'margin-left:68px; width: auto;';

    var options = { 
        weekday: 'long', 
        year: 'numeric', 
        month: 'long', 
        day: 'numeric', 
        hour: '2-digit', 
        minute: '2-digit', 
        second: '2-digit' 
    };
    
    var sec = 0;

    var locale = language || window.navigator.languages[0];

    var position = document.getElementById('helpMenu');

    var ClockLabel = document.createXULElement('label');
    ClockLabel.setAttribute('id', 'statusbar-clock-display');
    ClockLabel.setAttribute('class', 'statusbarpanel-text');
    ClockLabel.setAttribute('style', css);    
    position.parentNode.insertBefore(ClockLabel, position.nextSibling);

    if( agent == 1 ) {
        var AgentLabel = document.createXULElement('label');
        AgentLabel.setAttribute('id', 'statusbar-agent-display');
        AgentLabel.setAttribute('class', 'statusbarpanel-text');
        AgentLabel.setAttribute('style', css + cssA);
        var FFstr = window.navigator.userAgent.split(' ');
        var FF = FFstr[FFstr.length-1].replace( '/' , ' ' );
        // var text = "Firefox " + gAppInfo.version + personalText;
        // Cc["@mozilla.org/xre/app-info;1"].getService(Ci.nsIXULAppInfo).QueryInterface(Ci.nsIXULRuntime);
        
        var text = "Firefox   " + AppConstants.MOZ_APP_VERSION_DISPLAY + personalText;
        

        AgentLabel.setAttribute( 'value', text );
        position.parentNode.insertBefore(AgentLabel, position.nextSibling);
    }
    
    if( count == 1 ) {
        ClockLabel.addEventListener('dblclick', function() { sec = 0; });
    }
    
    window.setInterval( doDatClock , 1000 );
})();


Kann das jemand bestätigen oder nachvollziehen?
Gruß
D.Büssen

// main.js

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the userChrome.js component.
 *
 * The Initial Developer of the Original Code is
 * Simon Bünzli <zeniko@gmail.com>
 *
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * alta88 <alta88@gmail.com>
 * aborix <www.camp-firefox.de/forum>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

const { FileUtils } = ChromeUtils.importESModule(
  'resource://gre/modules/FileUtils.sys.mjs'
);

let UserChrome_js = {

  init: function() {
    Services.obs.addObserver(this, "final-ui-startup", false);
    Services.obs.addObserver(this, "domwindowopened", false);
  },

  // observer
  observe: function(aSubject, aTopic, aData) {
    switch (aTopic) {
      case "final-ui-startup":
        let path = PathUtils.profileDir;
        let ucFilePath = PathUtils.join(path, "chrome", "userChrome.js");
        let ucFile = new FileUtils.File(ucFilePath);
        if (!ucFile.exists()) {
          let path = PathUtils.join(ucjsDirPath, "Readme.txt");
          let readmeFile = new FileUtils.File(path);
          readmeFile.copyTo(ucFile.parent, "userChrome.js");
        };
        if (ucFile.exists() && ucFile.isFile()) {
          let path = PathUtils.join(ucjsDirPath, "utilities.js");
          this.utilFileURI = PathUtils.toFileURI(path);
          this.ucFileURI = PathUtils.toFileURI(ucFilePath);
//        Services.obs.addObserver(this, "domwindowopened", false);
        };
        Services.obs.removeObserver(this, "final-ui-startup");
        break;

      case "domwindowopened":
        aSubject.addEventListener("load", this, {capture: true, once: true});
        break;
    }
  },

  // event listener for load
  handleEvent: function(aEvent) {
    let document = aEvent.originalTarget;
    let window = document.defaultView;
    if (document.location && document.location.protocol == "chrome:") {
      try {
        Services.scriptloader.loadSubScript(this.utilFileURI, window, "UTF-8");
        Services.scriptloader.loadSubScript(this.ucFileURI, window, "UTF-8");
      }
      catch (ex) {
        // script execution can be stopped with |throw "stop";|
        if (ex != "stop") {
          Cu.reportError(ex);
        }
      }
    };
  }

};

UserChrome_js.init();

// config.js

try {
  Cu.importGlobalProperties(['PathUtils']);

  if (!Services.appinfo.inSafeMode) {
    let path = PathUtils.parent(PathUtils.xulLibraryPath);
    if (Services.appinfo.OS == 'Darwin') { // macOS
      path = PathUtils.join(PathUtils.parent(path), 'Resources');
    }
    var ucjsDirPath = PathUtils.join(path, 'userChromeJS');
    path = PathUtils.join(ucjsDirPath, 'main.js');
    const mainFileURI = PathUtils.toFileURI(path);
    Services.scriptloader.loadSubScript(mainFileURI, this, 'UTF-8');
  }
}
catch(e) {
  Cu.reportError(e);
}