Test Firefox/SeaMonkey extension for memory leaks: automatically opens/closes browser windows. First appears here: https://github.com/Infocatcher/Private_Tab/issues/45#issuecomment-17063542

leakTestWindow.js

var count = 25;
var delay = 1000;
function leakTestPrototype() {
	for(var i = 1; i <= count; ++i) {
		var win = window.openDialog(location.href, "", "chrome,all");
		win.addEventListener("load", function loader(e) {
			win.removeEventListener(e.type, loader, false);
			win.setTimeout(function() {
				win.document.documentElement.setAttribute("titlemodifier", "[" + i + "/" + count + "]");
				win.gBrowser.updateTitlebar();
			}, 0);
			win.setTimeout(function() {
				win.close();
				leakTestPrototype.__gen.next();
			}, delay);
		}, false);
		yield;
	}
	yield;
}
var leakTest = leakTestPrototype.__gen = leakTestPrototype();
leakTest.next();