BackUp-Script funktioniert in Nightly, das Icon ist aber verschwunden

// ==UserScript==
// @name           BackupProfile.uc.js
// @namespace      BackupProfile.github.com
// @description    Schaltfläche zum Sichern des Firefoxprofils
// @charset        UTF-8
// @author         ywzhaiqi、defpt
// @version        v2018.01.10
// @note           Vorlage Script von ywzhaiqi
// @note           Sicherungsdatei enthaelt auch Profilname (v2017.12.23); Ersatz veralteter Funktionen (v2017.12.28b)
// @reviewURL      http://bbs.kafan.cn/thread-1758785-1-1.html
(function () {
    Components.utils.import("resource:///modules/CustomizableUI.jsm");
    CustomizableUI.createWidget({
        id : "Backup-button",
        defaultArea : CustomizableUI.AREA_NAVBAR,
        label : "Profilsicherung",
        tooltiptext : "Sichern der aktuellen Konfiguration",
        onClick: function(){
            // Speicherort - Ordner festlegen - Sichern funktioniert nur wenn Speicherort- bzw. Ordner vorhanden ist!!
            var path = "G:\\Martin\\Sicherungen\\Firefox\\Firefox Sicherung\\Nightly\\";
            // var path = "";
            // Ausschlussliste
            var excludes = 'bookmarkbackups *cache* crashes fftmp *healthreport* minidumps safebrowsing *webapps* saved-telemetry-pings *thumbnails* *session* *Telemetry* *hotfix* *.sqlite-shm *.sqlite-wal *.bak parent.lock blocklist.xml content-prefs.sqlite directoryLinks.json mimeTypes.rdf compatibility.ini parent.lock formhistory.sqlite';


            if (!path) {
                var nsIFilePicker = Ci.nsIFilePicker;
                var FP = Cc['@mozilla.org/filepicker;1'].createInstance(nsIFilePicker);
                FP.init(window, 'Sicherungspfad wählen', nsIFilePicker.modeGetFolder);

                if (FP.show() == nsIFilePicker.returnOK) {
                    path = FP.file.path;
                } else {
                    return false;
                }
            }

            excludes = excludes.replace(/\./g, '\\.').replace(/\*/g, '.*').replace(/\s+/g, '|');
            excludes = new RegExp(excludes, 'i');

            var zw = Cc['@mozilla.org/zipwriter;1'].createInstance(Ci.nsIZipWriter);
            var pr = {PR_RDONLY: 0x01, PR_WRONLY: 0x02, PR_RDWR: 0x04, PR_CREATE_FILE: 0x08, PR_APPEND: 0x10, PR_TRUNCATE: 0x20, PR_SYNC: 0x40, PR_EXCL: 0x80};
            var fu = Cu.import('resource://gre/modules/FileUtils.jsm').FileUtils;
            var dir = fu.getFile('ProfD', []);
            var localnow = new Date().toLocaleString();   /*localnow = new Date().toISOString().slice(0,19); */
            localnow = localnow.replace(/T/g, "_").replace(/\W+/g, "_");
            var archiveName = 'Profil_' + bupgetCurrentProfileName()+ '_' + localnow + '.zip';
            var xpi = fu.File(path + '\\' + archiveName);

            zw.open(xpi, pr.PR_RDWR | pr.PR_CREATE_FILE | pr.PR_TRUNCATE);
            var dirArr = [dir];
            for (var i=0; i<dirArr.length; i++) {
                var dirEntries = dirArr[i].directoryEntries;
                while (dirEntries.hasMoreElements()) {
                    var entry = dirEntries.getNext().QueryInterface(Ci.nsIFile);
                    if (entry.path == xpi.path) {
                        continue;
                    }

                    if (entry.isDirectory()) {
                       dirArr.push(entry);
                    }

                    var relPath = entry.path.replace(dirArr[0].path, '');
                    if (relPath.match(excludes)) {
                        continue;
                    }

                    var saveInZipAs = relPath.substr(1);
                    saveInZipAs = saveInZipAs.replace(/\\/g,'/');
                    // Konfigurationsdateien können gesperrt werden
                    try {
                        zw.addEntryFile(saveInZipAs, Ci.nsIZipWriter.COMPRESSION_FASTEST, entry, false);
                    } catch (e) {}
                }
            }
            zw.close();
            alert('Die aktuelle Konfiguration wurde als:\n'+ archiveName +'\ngesichert in:\n' + path);

            function alert(aString, aTitle) {
                Cc['@mozilla.org/alerts-service;1'].getService(Ci.nsIAlertsService).showAlertNotification("", aTitle, aString, false, "", null);
            }

            function bupgetCurrentProfileName(){
                function readFile(aFile){
                    var stream = Cc["@mozilla.org/network/file-input-stream;1"].createInstance(Ci.nsIFileInputStream);    stream.init(aFile, 0x01, 0, 0);
                    var cvstream = Cc["@mozilla.org/intl/converter-input-stream;1"].createInstance(Ci.nsIConverterInputStream);
                    cvstream.init(stream, "UTF-8", 1024, Ci.nsIConverterInputStream.DEFAULT_REPLACEMENT_CHARACTER);
                    var content = "", data = {};
                    while (cvstream.readString(4096, data)) {
                        content += data.value;
                    }
                    cvstream.close();
                    return content.replace(/\r\n?/g, "\n");
                }
                var PrefD = Components.classes["@mozilla.org/file/directory_service;1"].getService(Components.interfaces.nsIProperties).get("PrefD", Components.interfaces.nsIFile);
                var ini = Components.classes["@mozilla.org/file/directory_service;1"].getService(Components.interfaces.nsIProperties).get("AppRegD", Components.interfaces.nsIFile);

                ini.append("profiles.ini");
                var ini = readFile(ini);
                var profiles = ini.match(/Name=.+/g);
                var profilesD = ini.match(/Path=.+/g);
                for ( var i = 0; i < profiles.length;i++) {
                if ((profilesD[i]+"$").indexOf(PrefD.leafName+"$") >= 0) {
                    profiles[i].match(/Name=(.+)$/);
                    return RegExp.$1;
                    }
                }
                return null;
            }
        },
    });

    var cssStr = '@-moz-document url(AppConstants.BROWSER_CHROME_URL){'
         + '#Backup-button .toolbarbutton-icon {'
         + 'list-style-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAALEgAACxIB0t1%2B%2FAAAABZ0RVh0Q3JlYXRpb24gVGltZQAwNC8xMS8wOGGVBZQAAAAcdEVYdFNvZnR3YXJlAEFkb2JlIEZpcmV3b3JrcyBDUzQGstOgAAABxklEQVQ4ja2UMUgbURjHfxeSFBzuBEuCkkAgIA5JDdzWohVnQe3UpRDE2UXpKKXdWro4ixlcdNJAydxiyHZkCIKIOEnLpZQSRFFz%2Bjqk73nvuDtb2j883nv%2F73u%2F%2B%2B69ewf%2FWUZgbgEFYDgiPw18B86An8DtQw%2BYdF1XRLVGoyGEEKJara4Bj0MKIhGYDxuGQVSTqtVqH0ql0uzvNzLigCQSicjmeZ7K63Q6u5VKZRoYigXGVWhZlpbbbrfrwKjfS4ZVGKVCoUCz2aTX65FOp6WdA04igf69CsqyLMrlctAWsRXGAf9EavXyFELEZT4A2TwYsLQKF%2BYXAJhb3VPep4%2BLzK3uqd7vS9Xr%2B2qsAW9u4eyoxcZSFoCVLZfTwxaA6v2xjaUsuYmnWrU60IOr%2FmD8etvl%2Fausikl%2FZcsFULEbD02hwPUdl7cvs1qiBAb9eOCdwdjEM2AABdh88wJA%2BbK%2FX6MDtVPmHyRPOfjRPfc87%2FPfgJLJ5AzwRc0BbNseB8a63e6TuKsXpnw%2BP5nJZAzgq%2BM4x3IPzwFM07woFovv%2Bv3%2BUDTiXqlU6tI0zQs%2FI%2FSe2bYt%2FyCPgJFA%2BAdwDeA4zrfg2l%2BwUqCoC1F3YQAAAABJRU5ErkJggg%3D%3D)'
         + '}}';
    var sss = Cc["@mozilla.org/content/style-sheet-service;1"].getService(Ci.nsIStyleSheetService);
    var ios = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
    sss.loadAndRegisterSheet(ios.newURI("data:text/css;base64," + btoa(cssStr), null, null), sss.USER_SHEET);
})();