UserCSSLoaderScript funktioniert nicht in Thunderbird

// ==UserScript==
// @name           UserCSSLoader
// @description    CSS Codes - Styles laden und verwalten
// @namespace      http://d.hatena.ne.jp/Griever/
// @author         Griever
// @include        main
// @license        MIT License
// @compatibility  Firefox 4 - 61*
// @charset        UTF-8
// @version        0.0.4g
// @note           Version 0.0.4.g ermoeglicht "Styles importieren" per Mittelklick und Verwendung
// @note           eines anderen Dateimanager (s. vFileManager in Zeile 54)
// @note           ergänzt um einen Parameter für den Dateimanager (s. vFMParameter in Zeile 56) von aborix
// @note           Frei verschiebbare Schaltfläche eingebaut von aborix 
// @note           0.0.4 Remove E4X
// @note           CSSEntry-Klasse erstellt
// @note           Style-Test-Funktion überarbeitet
// @note           Wenn die Datei gelöscht wurde, CSS beim Neu erstellen und Löschen des Menüs abbrechen
// @note           uc einlesen .uc.css temporäre Korrespondenz zum erneuten Lesen
// ==/UserScript==

/****** Bedienungsanleitung ******

Da der CSS-Ordner im Chrome-Ordner erstellt wurde, CSS-Dateien dort ablegen - speichern.
Diejenigen, deren Dateiname mit "xul-" beginnen, diejenigen, die mit ".as.css" enden, sind AGENT_SHEET, 
andere außer USER_SHEET werden gelesen. Da der Inhalt der Datei nicht überprüft wird,
darauf achten, @ Namespace Angabe nicht zu vergessen!

CSS-Menü wird zur Menüleiste hinzugefügt
Linksklick auf Stil, zum aktivieren/deaktivieren
Mittelklick auf Stil zum aktivieren/deaktivieren, ohne Menü zu schließen
Rechtsklick auf Stil zum Öffnen im Editor

Verwenden des in "view_source.editor.path" angegebenen Editors
Ordner kann geändert werden, indem ein Pfad in "UserCSSLoader.FOLDER" eingefügt wird

 **** Anleitung Ende ****/

(function(){

let { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
if (!window.Services)
    Cu.import("resource://gre/modules/Services.jsm");
// Wenn beim Start ein anderes Fenster angezeigt wird (das zweite Fenster), wird es beendet
let list = Services.wm.getEnumerator("navigator:browser");
while(list.hasMoreElements()){ if(list.getNext() != window) return; }

if (window.UCL) {
    window.UCL.destroy();
    delete window.UCL;
}

window.UCL = {
    vFileManager: 'H:\\TotalCommander\\TotalCmd64.exe',
    vFMParameter: '/T',
    USE_UC: "UC" in window,
    AGENT_SHEET: Ci.nsIStyleSheetService.AGENT_SHEET,
    USER_SHEET : Ci.nsIStyleSheetService.USER_SHEET,
    readCSS    : {},
    get disabled_list() {
        let obj = [];
        try {
            obj = this.prefs.getCharPref("disabled_list").split("|");
        } catch(e) {}
        delete this.disabled_list;
        return this.disabled_list = obj;
    },
    get prefs() {
        delete this.prefs;
        return this.prefs = Services.prefs.getBranch("UserCSSLoader.")
    },
    get styleSheetServices(){
        delete this.styleSheetServices;
        return this.styleSheetServices = Cc["@mozilla.org/content/style-sheet-service;1"].getService(Ci.nsIStyleSheetService);
    },
    get FOLDER() {
        let aFolder;
        try {
            // UserCSSLoader.FOLDER verwenden
            let folderPath = this.prefs.getCharPref("FOLDER");
            aFolder = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile)
            aFolder.initWithPath(folderPath);
        } catch (e) {
            aFolder = Services.dirsvc.get("UChrm", Ci.nsIFile);
            aFolder.appendRelativePath("CSS");
        }
        if (!aFolder.exists() || !aFolder.isDirectory()) {
            aFolder.create(Ci.nsIFile.DIRECTORY_TYPE, 0664);
        }
        delete this.FOLDER;
        return this.FOLDER = aFolder;
    },
    getFocusedWindow: function() {
        let win = document.commandDispatcher.focusedWindow;
        if (!win || win == window) win = content;
        return win;
    },

    init: function() {
        const cssmenu = $C("menu", {
            id: "usercssloader-menu",
            label: "CSS",
            accesskey: "C",
            onclick: "if (event.button == 1) UCL.rebuild()"
        });
        const menupopup = $C("menupopup", {
            id: "usercssloader-menupopup"
        });
        cssmenu.appendChild(menupopup);

        let menu = $C("menu", {
            label: "Style Loader Menü",
            id: "style-loader-menu",
            accesskey: "M"
        });
        menupopup.appendChild(menu);
        let mp = $C("menupopup", {
            id: "usercssloader-submenupopup" });
        menu.appendChild(mp);
        mp.appendChild($C("menuitem", {
            label: "Styles importieren",
            accesskey: "R",
            acceltext: "Alt + R",
            oncommand: "UCL.rebuild();"
        }));
        mp.appendChild($C("menuseparator"));
        mp.appendChild($C("menuitem", {
            label: "CSS Datei erstellen",
            accesskey: "D",
            oncommand: "UCL.create();"
        }));
        mp.appendChild($C("menuitem", {
            label: "CSS Ordner öffnen",
            accesskey: "O",
            oncommand: "UCL.openFolder();"
        }));
        mp.appendChild($C("menuitem", {
            label: "userChrome.css bearbeiten",
            hidden: false,
            oncommand: "UCL.editUserCSS(\'userChrome.css\');"
        }));
        mp.appendChild($C("menuitem", {
            label: "userContent.css bearbeiten",
            hidden: false,
            oncommand: "UCL.editUserCSS(\'userContent.css\');"
        }));
                // mp.appendChild($C("menuitem", {
            // label: "UserCSSLoader.disabled_list bearbeiten",
            // hidden: false,
            // oncommand: "UCL.editUserCSS(\'UserCSSLoader.disabled_list\');"
        // }));
        mp.appendChild($C("menuseparator"));
        mp.appendChild($C("menuitem", {
            label: "Style Test (Chrome)",
            id: "usercssloader-test-chrome",
            hidden: true,
            accesskey: "C",
            oncommand: "UCL.styleTest(window);"
        }));
        mp.appendChild($C("menuitem", {
            label: "Style Test (Web)",
            id: "usercssloader-test-content",
            hidden: true,
            accesskey: "W",
            oncommand: "UCL.styleTest();"
        }));
        mp.appendChild($C("menuitem", {
            label: "Styles dieser Seite auf userstyles.org finden",
            hidden: true,
            accesskey: "S",
            oncommand: "UCL.searchStyle();"
        }));

        menu = $C("menu", {
            label: ".uc.css",
            accesskey: "U",
            hidden: !UCL.USE_UC
        });
        menupopup.appendChild(menu);
        mp = $C("menupopup", { id: "usercssloader-ucmenupopup" });
        menu.appendChild(mp);
        mp.appendChild($C("menuitem", {
            label: "Importieren(.uc.js)",
            oncommand: "UCL.UCrebuild();"
        }));
        mp.appendChild($C("menuseparator", { id: "usercssloader-ucseparator" }));

        $('mail-menubar').appendChild(cssmenu);

        $("mailKeys").appendChild($C("key", {
            id: "usercssloader-rebuild-key",
            oncommand: "UCL.rebuild();",
            key: "R",
            modifiers: "alt",
        }));
        this.rebuild();
        this.initialized = true;
        if (UCL.USE_UC) {
            setTimeout(function() {
                UCL.UCcreateMenuitem();
            }, 1000);
        }
        window.addEventListener("unload", this, false);
    },
    uninit: function() {
        const dis = [];
        for (let x of Object.keys(this.readCSS)) {
            if (!this.readCSS[x].enabled)
                dis.push(x);
        }
        this.prefs.setCharPref("disabled_list", dis.join("|"));
        window.removeEventListener("unload", this, false);
    },
    destroy: function() {
        var i = document.getElementById("usercssloader-menu");
        if (i) i.parentNode.removeChild(i);
        var i = document.getElementById("usercssloader-rebuild-key");
        if (i) i.parentNode.removeChild(i);
        this.uninit();
    },
    handleEvent: function(event) {
        switch(event.type){
            case "unload": this.uninit(); break;
        }
    },
    rebuild: function() {
        let ext = /\.css$/i;
        let not = /\.uc\.css/i;
        let files = this.FOLDER.directoryEntries.QueryInterface(Ci.nsISimpleEnumerator);
        while (files.hasMoreElements()) {
            let file = files.getNext().QueryInterface(Ci.nsIFile);
            if (!ext.test(file.leafName) || not.test(file.leafName)) continue;
            let CSS = this.loadCSS(file);
            CSS.flag = true;
        }
        for (let leafName of Object.keys(this.readCSS)) {
            const CSS = this.readCSS[leafName];
            if (!CSS.flag) {
                CSS.enabled = false;
                delete this.readCSS[leafName];
            }
            delete CSS.flag;
            this.rebuildMenu(leafName);
        }
        if (this.initialized) {
            if (typeof(StatusPanel) !== "undefined")
                StatusPanel._label = "Style importiert";
            else
                XULBrowserWindow.statusTextField.label = "Styles importieren";
        }
    },
    loadCSS: function(aFile) {
        var CSS = this.readCSS[aFile.leafName];
        if (!CSS) {
            CSS = this.readCSS[aFile.leafName] = new CSSEntry(aFile);
            if (this.disabled_list.indexOf(CSS.leafName) === -1) {
                CSS.enabled = true;
            }
        } else if (CSS.enabled) {
            CSS.enabled = true;
        }
        return CSS;
    },
    rebuildMenu: function(aLeafName) {
        var CSS = this.readCSS[aLeafName];
        var menuitem = document.getElementById("usercssloader-" + aLeafName);
        if (!CSS) {
            if (menuitem)
                menuitem.parentNode.removeChild(menuitem);
            return;
        }
        if (!menuitem) {
            menuitem = document.createXULElement("menuitem");
            menuitem.setAttribute("label", aLeafName);
            menuitem.setAttribute("id", "usercssloader-" + aLeafName);
            menuitem.setAttribute("class", "usercssloader-item " + (CSS.SHEET == this.AGENT_SHEET? "AGENT_SHEET" : "USER_SHEET"));
            menuitem.setAttribute("type", "checkbox");
            menuitem.setAttribute("autocheck", "false");
            menuitem.setAttribute("oncommand", "UCL.toggle('"+ aLeafName +"');");
            menuitem.setAttribute("onclick", "UCL.itemClick(event);");
            menuitem.setAttribute("onmouseup", "if (event.button == 1) event.preventDefault();");
            document.getElementById("usercssloader-menupopup").appendChild(menuitem);
        }
        menuitem.setAttribute("checked", CSS.enabled);
    },
    toggle: function(aLeafName) {
        var CSS = this.readCSS[aLeafName];
        if (!CSS) return;
        CSS.enabled = !CSS.enabled;
        this.rebuildMenu(aLeafName);
    },
    itemClick: function(event) {
        if (event.button == 0) return;
        event.preventDefault();
        event.stopPropagation();
        let label = event.currentTarget.getAttribute("label");
        if (event.button == 1) {
            this.toggle(label);
        }
        else if (event.button == 2) {
            // closeMenus(event.target);
            let file = this.getFileFromLeafName(label)
            this.edit(file);
        }
    },
    getFileFromLeafName: function(aLeafName) {
        let f = this.FOLDER.clone();
        f.QueryInterface(Ci.nsIFile); // use appendRelativePath
        f.appendRelativePath(aLeafName);
        return f;
    },
    styleTest: function(aWindow) {
        aWindow || (aWindow = this.getFocusedWindow());
        new CSSTester(aWindow, function(tester){
            if (tester.saved)
                UCL.rebuild();
        });
    },
    searchStyle: function() {
        let word;
        try {
            word = gBrowser.currentURI.host;
        } catch {
            word = gBrowser.currentURI.spec;
        }
        openWebLinkIn("https://userstyles.org/styles/search/" + word, "tab", {});
    },
    openFolder:function(){
        if (this.vFileManager.length != 0) {
            var file = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
            var process = Cc['@mozilla.org/process/util;1'].createInstance(Ci.nsIProcess);
            var args=[this.vFMParameter,this.FOLDER.path];
            file.initWithPath(this.vFileManager);
            process.init(file);
            // Verzeichnis mit anderem Dateimanager öffnen
            process.run(false, args, args.length);
        } else {
            // Verzeichnis mit Dateimanager des Systems öffnen
            this.FOLDER.launch();
        }
    },
    editUserCSS: function(aLeafName) {
        let file = Services.dirsvc.get("UChrm", Ci.nsIFile);
        file.appendRelativePath(aLeafName);
        this.edit(file);
    },
    edit: function(aFile) {
        var editor = Services.prefs.getCharPref("view_source.editor.path");
        if (!editor) return alert("Unter about:config den vorhandenen Schalter:\n view_source.editor.path mit dem Editorpfad ergänzen");
        try {
            var UI = Components.classes["@mozilla.org/intl/scriptableunicodeconverter"].createInstance(Components.interfaces.nsIScriptableUnicodeConverter);
            UI.charset = window.navigator.platform.toLowerCase().indexOf("win") >= 0? "Shift_JIS": "UTF-8";
            var path = UI.ConvertFromUnicode(aFile.path);
            var app = Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsIFile);
            app.initWithPath(editor);
            var process = Components.classes["@mozilla.org/process/util;1"].createInstance(Components.interfaces.nsIProcess);
            process.init(app);
            process.run(false, [path], 1);
        } catch (e) {}
    },
    create: function(aLeafName) {
        if (!aLeafName) aLeafName = prompt("Name des Styles", dateFormat(new Date(), "%Y_%m%d_%H%M%S"));
        if (aLeafName) aLeafName = aLeafName.replace(/\s+/g, " ").replace(/[\\/:*?\"<>|]/g, "");
        if (!aLeafName || !/\S/.test(aLeafName)) return;
        if (!/\.css$/.test(aLeafName)) aLeafName += ".css";
        let file = this.getFileFromLeafName(aLeafName);
        this.edit(file);
    },
    UCrebuild: function() {
        let re = /^file:.*\.uc\.css(?:\?\d+)?$/i;
        let query = "?" + new Date().getTime();
        [...document.styleSheets].slice().forEach(function(css){
            if (!re.test(css.href)) return;
            if (css.ownerNode) {
                css.ownerNode.parentNode.removeChild(css.ownerNode);
            }
            let pi = document.createProcessingInstruction('xml-stylesheet','type="text/css" href="'+ css.href.replace(/\?.*/, '') + query +'"');
            document.insertBefore(pi, document.documentElement);
        });
        UCL.UCcreateMenuitem();
    },
    UCcreateMenuitem: function() {
        let sep = $("usercssloader-ucseparator");
        let popup = sep.parentNode;
        if (sep.nextSibling) {
            let range = document.createRange();
            range.setStartAfter(sep);
            range.setEndAfter(popup.lastChild);
            range.deleteContents();
            range.detach();
        }

        let re = /^file:.*\.uc\.css(?:\?\d+)?$/i;
        [...document.styleSheets].slice().forEach(function(css) {
            if (!re.test(css.href)) return;
            let fileURL = decodeURIComponent(css.href).split("?")[0];
            let aLeafName = fileURL.split("/").pop();
            let m = document.createXULElement("menuitem");
            m.setAttribute("label", aLeafName);
            m.setAttribute("tooltiptext", fileURL);
            m.setAttribute("id", "usercssloader-" + aLeafName);
            m.setAttribute("type", "checkbox");
            m.setAttribute("autocheck", "false");
            m.setAttribute("checked", "true");
            m.setAttribute("oncommand", "this.setAttribute('checked', !(this.css.disabled = !this.css.disabled));");
            m.setAttribute("onclick", "UCL.UCItemClick(event);");
            m.css = css;
            popup.appendChild(m);
        });
    },
    UCItemClick: function(event) {
        if (event.button == 0) return;
        event.preventDefault();
        event.stopPropagation();

        if (event.button == 1) {
            event.target.doCommand();
        }
        else if (event.button == 2) {
            closeMenus(event.target);
            let fileURL = event.currentTarget.getAttribute("tooltiptext");
            let file = Services.io.getProtocolHandler("file").QueryInterface(Components.interfaces.nsIFileProtocolHandler).getFileFromURLSpec(fileURL);
            this.edit(file);
        }
    },
};

function CSSEntry(aFile) {
    this.path = aFile.path;
    this.leafName = aFile.leafName;
    this.lastModifiedTime = 1;
    this.SHEET = /^xul-|\.as\.css$/i.test(this.leafName) ? 
        Ci.nsIStyleSheetService.AGENT_SHEET: 
        Ci.nsIStyleSheetService.USER_SHEET;
}
CSSEntry.prototype = {
    sss: Components.classes["@mozilla.org/content/style-sheet-service;1"]
                    .getService(Components.interfaces.nsIStyleSheetService),
    _enabled: false,
    get enabled() {
        return this._enabled;
    },
    set enabled(isEnable) {
        var aFile = Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsIFile)
        aFile.initWithPath(this.path);
    
        var isExists = aFile.exists(); // Wenn die Datei existiert true
        var lastModifiedTime = isExists ? aFile.lastModifiedTime : 0;
        var isForced = this.lastModifiedTime != lastModifiedTime; // Wenn es eine Änderung in der Datei gibt true

        var fileURL = Services.io.getProtocolHandler("file").QueryInterface(Components.interfaces.nsIFileProtocolHandler).getURLSpecFromFile(aFile);
        var uri = Services.io.newURI(fileURL, null, null);

        if (this.sss.sheetRegistered(uri, this.SHEET)) {
            // Wenn diese Datei bereits gelesen wurde
            if (!isEnable || !isExists) {
                this.sss.unregisterSheet(uri, this.SHEET);
            }
            else if (isForced) {
                // Nach Stornierung erneut einlesen
                this.sss.unregisterSheet(uri, this.SHEET);
                this.sss.loadAndRegisterSheet(uri, this.SHEET);
            }
        } else {
            // Datei wurde nicht gelesen
            if (isEnable && isExists) {
                this.sss.loadAndRegisterSheet(uri, this.SHEET);
            }
        }
        if (this.lastModifiedTime !== 1 && isEnable && isForced) {
            log(this.leafName + " wurde aktualisiert");
        }
        this.lastModifiedTime = lastModifiedTime;
        return this._enabled = isEnable;
    },
};

function CSSTester(aWindow, aCallback) {
    this.win = aWindow || window;
    this.doc = this.win.document;
    this.callback = aCallback;
    this.init();
}
CSSTester.prototype = {
    sss: Components.classes["@mozilla.org/content/style-sheet-service;1"]
                    .getService(Components.interfaces.nsIStyleSheetService),
    preview_code: "",
    saved: false,
    init: function() {
        this.dialog = openDialog(
            "data:text/html;charset=utf8,"+encodeURIComponent('<!DOCTYPE HTML><html lang="ja"><head><title>CSSTester</title></head><body></body></html>'),
            "",
            "width=550,height=400,dialog=no");
        this.dialog.addEventListener("load", this, false);
    },
    destroy: function() {
        this.preview_end();
        this.dialog.removeEventListener("unload", this, false);
        this.previewButton.removeEventListener("click", this, false);
        this.saveButton.removeEventListener("click", this, false);
        this.closeButton.removeEventListener("click", this, false);
    },
    handleEvent: function(event) {
        switch(event.type) {
            case "click":
                if (event.button != 0) return;
                if (this.previewButton == event.currentTarget) {
                    this.preview();
                }
                else if (this.saveButton == event.currentTarget) {
                    this.save();
                }
                else if (this.closeButton == event.currentTarget) {
                    this.dialog.close();
                }
                break;
            case "load":
                var doc = this.dialog.document;
                doc.body.innerHTML = '\
                    <style type="text/css">\
                        :not(input):not(select) { padding: 0px; margin: 0px; }\
                        table { border-spacing: 0px; }\
                        body, html, #main, #textarea { width: 100%; height: 100%; }\
                        #textarea { font-family: monospace; }\
                    </style>\
                    <table id="main">\
                        <tr height="100%">\
                            <td colspan="4"><textarea id="textarea"></textarea></td>\
                        </tr>\
                        <tr height="40">\
                            <td><input type="button" value="Vorschau" id="Vorschau"/></td>\
                            <td><input type="button" value="Speichern" id="Speichern"/></td>\
                            <td width="80%"><span class="log"></span></td>\
                            <td><input type="button" value="Schließen" id="Schliessen"/></td>\
                        </tr>\
                    </table>\
                ';
                this.textbox = doc.querySelector("textarea");
                this.previewButton = doc.querySelector('input[value="Vorschau"]');
                this.saveButton = doc.querySelector('input[value="Speichern"]');
                this.closeButton = doc.querySelector('input[value="Schließen"]');
                this.logField = doc.querySelector('.log');

                var code = "@namespace url(" + this.doc.documentElement.namespaceURI + ");\n";
                code += this.win.location.protocol.indexOf("http") === 0?
                    "@-moz-document domain(" + this.win.location.host + ") {\n\n\n\n}":
                    "@-moz-document url(" + this.win.location.href + ") {\n\n\n\n}";
                this.textbox.value = code;
                this.dialog.addEventListener("unload", this, false);
                this.previewButton.addEventListener("click", this, false);
                this.saveButton.addEventListener("click", this, false);
                this.closeButton.addEventListener("click", this, false);

                this.textbox.focus();
                let p = this.textbox.value.length - 3;
                this.textbox.setSelectionRange(p, p);

                break;
            case "unload":
                this.destroy();
                this.callback(this);
                break;
        }
    },
    preview: function() {
        var code = this.textbox.value;
        if (!code || !/\:/.test(code))
            return;
        code = "data:text/css;charset=utf-8," + encodeURIComponent(this.textbox.value);
        if (code == this.preview_code)
            return;
        this.preview_end();
        var uri = Services.io.newURI(code, null, null);
        this.sss.loadAndRegisterSheet(uri, Ci.nsIStyleSheetService.AGENT_SHEET);
        this.preview_code = code;
        this.log("Preview");
    },
    preview_end: function() {
        if (this.preview_code) {
            let uri = Services.io.newURI(this.preview_code, null, null);
            this.sss.unregisterSheet(uri, Ci.nsIStyleSheetService.AGENT_SHEET);
            this.preview_code = "";
        }
    },
    save: function() {
        var data = this.textbox.value;
        if (!data) return;

        var fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
        fp.init(window, "", Ci.nsIFilePicker.modeSave);
        fp.appendFilter("CSS Files","*.css");
        fp.defaultExtension = "css";
        if (window.UCL)
            fp.displayDirectory = UCL.FOLDER;
        var res = fp.show();
        if (res != fp.returnOK && res != fp.returnReplace) return;

        var suConverter = Cc["@mozilla.org/intl/scriptableunicodeconverter"].createInstance(Ci.nsIScriptableUnicodeConverter);
        suConverter.charset = "UTF-8";
        data = suConverter.ConvertFromUnicode(data);
        var foStream = Cc["@mozilla.org/network/file-output-stream;1"].createInstance(Ci.nsIFileOutputStream);
        foStream.init(fp.file, 0x02 | 0x08 | 0x20, 0664, 0);
        foStream.write(data, data.length);
        foStream.close();
        this.saved = true;
    },
    log: function() {
        this.logField.textContent = dateFormat(new Date(), "%H:%M:%S") + ": " + $A(arguments);
    }
};

UCL.init();

function $(id) { return document.getElementById(id); }
function $A(arr) { return [...arr].slice(); }
function $C(name, attr) {
    var el = document.createXULElement(name);
    if (attr) Object.keys(attr).forEach(function(n) { el.setAttribute(n, attr[n]) });
    return el;
}
function dateFormat(date, format) {
    format = format.replace("%Y", ("000" + date.getFullYear()).substr(-4));
    format = format.replace("%m", ("0" + (date.getMonth()+1)).substr(-2));
    format = format.replace("%d", ("0" + date.getDay()).substr(-2));
    format = format.replace("%H", ("0" + date.getHours()).substr(-2));
    format = format.replace("%M", ("0" + date.getMinutes()).substr(-2));
    format = format.replace("%S", ("0" + date.getSeconds()).substr(-2));
    return format;
}

function log() { Application.console.log([...arguments].slice()); }

})();