redirect.js

var redirect = (function () {
	var isFirefox = false;
	var browser   = window.navigator.userAgent;
	var location  = window.location;

	var fixFirefoxHistory = function () {
		var hash      = window.location.hash;
		var timestamp = Date.now();

		if (isFirefox) {
			hash = hash.length ? '' + hash + '-' + timestamp : timestamp;
			location.hash = hash;
		}
	};

	if (browser.toLowerCase().indexOf('firefox') > -1) {
		isFirefox = true;
	}

	return function redirect (url) {
		if (url) {
			/** fix Chrome's back button */
			location.hash = '';
			/** fix Firefox's back button */
			fixFirefoxHistory();
			/** redirect with function or directly */
			if (location.assign) {
				location.assign(url);
			} else {
				location = url;
			}
		}
	};
}());