Test.uc.js ist das Icon verschwunden

// ruft die Datei Test.uc.js direkt auf

(function() {
      if (location != 'chrome://browser/content/browser.xhtml') return;

try {
ChromeUtils.importESModule("resource:///modules/CustomizableUI.sys.mjs");
     CustomizableUI.createWidget({
     id: "Scriptbutton",
     defaultArea: CustomizableUI.AREA_NAVBAR,
     removable: true,
     label: "Openscriptbutton",
     tooltiptext: "Test.uc.js",
     onClick: function(event) {
               
if (event.button != 0){
return;
}
           
var dir = Services.dirsvc.get('UChrm', Ci.nsIFile);
     dir.append('Test.uc.js');
    //dir.append('Test.css');
    dir.launch();
   
},
onCreated: function(aNode) {
aNode.style.listStyleImage = 'url( data:image/png;base64,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)';
return aNode;
}
});
       
                   
} catch (e) {
Components.utils.reportError(e);
};

})();

// ruft die Datei Test.css im Ordner CSS direkt auf


(function() {
	if (location.href !== 'chrome://browser/content/browser.xhtml') return;

	try {
		ChromeUtils.importESModule("resource:///modules/CustomizableUI.sys.mjs");
		CustomizableUI.createWidget({
			id: "button-testcss",
			defaultArea: CustomizableUI.AREA_NAVBAR,
			removable: true,
			label: "Test.ccs",
			tooltiptext: "Test.css",
			onClick: function() {
			
				var dir = Services.dirsvc.get('UChrm', Ci.nsIFile);
				dir.append('CSS');
				dir.append('Test.css');
				dir.launch();
	
			},
			onCreated: function(aNode) {
				aNode.style.listStyleImage = 'url(data:image/gif;base64,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)';
				return aNode;
			}
		});
	} catch (e) {
		Components.utils.reportError(e);
	};

})();