Jetpack のスクリプト内で this のプロパティを for in で取得してみた

Jjetpack_this.js

/*
jetpack.tabs.focused.contentWindow.alert(this);//[object Sandbox]
for (var n in this)
*/
{
	location : file:///C:/test.js,
	console : [object Object],
	$ : function (selector, context) {
	    return new (jQuery.fn.init)(selector, context);
	},
	jQuery : function (selector, context) {
	    return new (jQuery.fn.init)(selector, context);
	},
	jetpack : [object Object],
	setInterval : function (cb, ms) {

	    function cbWrapper() {
	        cb();
	    }

	    var id = impl.setInterval(cbWrapper, ms);
	    intervals[id] = cbWrapper;
	    return id;
	},
	clearInterval : function (id) {
	    if (id in intervals) {
	        delete intervals[id];
	        impl.clearInterval(id);
	    }
	},
	setTimeout : function (cb, ms) {

	    function cbWrapper() {
	        delete timeouts[id];
	        cb();
	    }

	    var id = impl.setTimeout(cbWrapper, ms);
	    timeouts[id] = cbWrapper;
	    return id;
	},
	clearTimeout : function (id) {
	    if (id in timeouts) {
	        delete timeouts[id];
	        impl.clearTimeout(id);
	    }
	},
	addStatusBarPanel : function () {
	    throw new Error("addStatusBarPanel() has been moved to Jetpack.statusBar.append().");
	},
	Jetpack : [object Object]
}