add: this.branch.deleteBranch("formats"); 
context: 	save: function(options, prop_name) {		if (prop_name) {			this.setCharPref(prop_name, options[prop_name]);		} else {			var name;			for (name in options) {				this.setCharPref(name, options[name]);			}		}	}
meta: 3428	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3428/8c6bee0659653d06eef565a6c6695a89c3ae02d0/options.js/clean/src/content/options.js