var var_dataUrlsBranch = Components.classes["@mozilla.org/preferences-service;1"]
			.getService(Components.interfaces.nsIPrefService)
			.getBranch('extensions.odfReader.')
		var arr_xsltUrls = var_dataUrlsBranch.getChildList('xsltPaths.', {})
		for(var i=0;i<arr_xsltUrls.length;i++){
			if(var_dataUrlsBranch.getCharPref(arr_xsltUrls[i])){
				var tmpURL=var_dataUrlsBranch.getCharPref(arr_xsltUrls[i])
                         }
                }