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		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])                         }                }