Buttons funktionieren nur im/ für das erste Fenster

// ButtonProfilordner.uc.js
// Öffnen des "Profilordners"

(function() {
	if (!window.gBrowser)
		return;

	CustomizableUI.createWidget({
		id: 'buttonProfilOrdner',
		defaultArea: CustomizableUI.AREA_NAVBAR,
		label: 'Profilordner öffnen',
		tooltiptext: 'Profilordner öffnen',

		onCreated: (button) => {
			button.style.listStyleImage = 'url("file:///C:/FoxIcons2/prof.png")';

			button.addEventListener('click', () => {
				if (event.button == 0) {
					uProfMenu.prefDirOpen('ProfD');
				}
			})
		}
	});
})();

 //  Button zum Aufruf des Profil-Ordners
  
  (function() {
	  
	  if (location.href !== 'chrome://browser/content/browser.xhtml') return;
	
	try {
		ChromeUtils.importESModule("resource:///modules/CustomizableUI.sys.mjs");
		const sss = Components.classes["@mozilla.org/content/style-sheet-service;1"].getService(Components.interfaces.nsIStyleSheetService);
		
		const button_label = "Profil Button (generic)";
        const open_in_a_window = false; 
		
		CustomizableUI.createWidget({
			id: 'Profil-Button',
			defaultArea: CustomizableUI.AREA_NAVBAR,
			removable: true,
	        label: button_label, 
	        tooltiptext: button_label, 
	        onClick: function(event) {
		
			    const win = Components.classes["@mozilla.org/appshell/window-mediator;1"]
		           .getService(Components.interfaces.nsIWindowMediator)
		           .getMostRecentWindow("navigator:browser");
		
                if(event.button=='0') {
		          try {
		  
		            if(open_in_a_window)
		              window.open("ProfD");
		              uProfMenu.prefDirOpen('ProfD');
							  		  
		} catch (e) {}
	  }   
	},
	onCreated: function(button) {
	  return button;
	}
		
  });
					
// style button icon
  const uri = Services.io.newURI("data:text/css;charset=utf-8," + encodeURIComponent('\
	\
	  #Profil-Button .toolbarbutton-icon {\
		list-style-image: url("file:///C:/FoxIcons2/prof.png"); \
	}\
	\
  '), null, null);
  
  sss.loadAndRegisterSheet(uri, sss.AGENT_SHEET);
  
} catch (e) {
	Components.utils.reportError(e);
};

})();					

// ------------------------------------------------------------------------------------------------
	// Pfad zum Profilordner
	let ProfilePath = Services.dirsvc.get("ProfD", Ci.nsIFile).path.replace(/\\/g, "/");
	// Pfad in den entsprechenden Unterordner
	let IconPath = '/chrome/icons/';
	// Name & Dateiendung des anzuzeigenden Symbols!
	let ButtonIcon = "DeepL_2.png";
	// Erstelle ein img-Element, um zu überprüfen, ob die Grafik geladen werden kann
	let img = new Image();
	img.src = "file:" + ProfilePath + IconPath + ButtonIcon;

	img.onload = function() {
		// Wenn die Grafik geladen werden kann, setze das listStyleImage
		menuitem.style.listStyleImage = 'url("' + ("file:" + ProfilePath + IconPath + ButtonIcon) + '")';
	};

	img.onerror = function() {
		// Wenn die Grafik nicht geladen werden kann, verwende das Fallback-Icon
		menuitem.style.listStyleImage = 'url("chrome://browser/skin/translations.svg")';
	};
// ------------------------------------------------------------------------------------------------

// ButtonProfilordner.uc.js
// Öffnen des "Profilordners"

(function() {

    if (location != "chrome://browser/content/browser.xhtml") return;
    try {
        CustomizableUI.createWidget({
            id: 'profilefolder-ToolBarButton',
            type: 'custom',
            onBuild: function(aDocument) {
                let toolbaritem = aDocument.createXULElement('toolbarbutton');
                let props = {
                    id: 'profilefolder-ToolBarButton',
                    class: 'toolbarbutton-1 chromeclass-toolbar-additional',
                    label: 'Profil-Ordner',
                    tooltiptext: 'Profil-Ordner öffnen',
        //            onclick: 'if (event.button == 0) { \
        //                    Services.dirsvc.get("ProfD", Ci.nsIFile).launch(); \
        //                }; '
                };
                for (var p in props)  {
                    toolbaritem.setAttribute(p, props[p]);
                }

                // Pfad zum Profilordner
                let ProfilePath = Services.dirsvc.get("ProfD", Ci.nsIFile).path.replace(/\\/g, "/");
                // Pfad in den entsprechenden Unterordner
                let IconPath = '/chrome/icons/';
                // Name & Dateiendung des anzuzeigenden Symbols!
                let ButtonIcon = "prof.png";
                // Erstelle ein img-Element, um zu überprüfen, ob die Grafik geladen werden kann
                let img = new Image();
                img.src = "file:" + ProfilePath + IconPath + ButtonIcon;

                img.onload = function() {
                    // Wenn die Grafik geladen werden kann, setze das listStyleImage
                    toolbaritem.style.listStyleImage = 'url("' + ("file:" + ProfilePath + IconPath + ButtonIcon) + '")';
                };

                img.onerror = function() {
                    // Wenn die Grafik nicht geladen werden kann, verwende das Fallback-Icon
                    toolbaritem.style.listStyleImage = 'url("chrome://browser/skin/fxa/avatar-empty.svg")';
                };
                return toolbaritem; 
            }
        });

    } catch(e){}

    document.getElementById('profilefolder-ToolBarButton').addEventListener('click', event => {
        if (event.button === 0) {
            Services.dirsvc.get("ProfD", Ci.nsIFile).launch();
            }
        });
})();    

// Button_Verzeichnisse.uc.js
// Linksklick öffnet Profilordner
// Mittelklick öffnet Installationsordner
// Rechtsklick öffnet Ordner chrome

(function() {
	if (!window.gBrowser)
		return;
     
	try { 
	        CustomizableUI.createWidget({
            id: 'buttonOrdner',
            type: 'custom',
            defaultArea: CustomizableUI.AREAS,
            onBuild: function(aDocument) {
               var toolbaritem = aDocument.createElementNS('http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul', 'toolbarbutton');
               var props = {
                    id: 'buttonOrdner',
                    class: 'toolbarbutton-1 chromeclass-toolbar-additional',
                    removable: true,
                // Name im AnpassungFenster
                    label: 'Ordner aufrufen',
                // Name bei MausHover wenn in Symbolleiste
                    tooltiptext: 'Links Profilordner / Mitte Installationsordner / Rechts Ordner chrome',
                    style: 'list-style-image: url("file:///C:/FoxIcons2/ordner2.png")',
			
		       };
               for (var p in props)
                  toolbaritem.setAttribute(p, props[p]);

               return toolbaritem;
			   
               }
            });
        } catch(e) { };	

			document.getElementById('buttonOrdner').addEventListener('click', event => {
				if (event.button == 0) {
					uProfMenu.prefDirOpen('ProfD');
				}
				if (event.button == 1) {
					uProfMenu.prefDirOpen('CurProcD');
				}
				if (event.button == 2) {
					Services.dirsvc.get("UChrm", Ci.nsIFile).launch();
				}
			});
})();