html5 notify [Firefox 22+]

cryptocat.js

function desktopNotification(image, title, body, timeout) {
... 

	if( (navigator.userAgent.toLowerCase().match('firefox\/(.*)')[1] | 0) >= 22 ){
		var notice = new Notification(title, { tag : "cryptocat", body : body, icon : image });
		if (timeout > 0) {
			window.setTimeout(function() {
				notice.close()
			}, timeout)
		}
	}
	
...

}

...
...

// Desktop notifications button.
if (!window.webkitNotifications && !Notification.permission) {
	$('#notifications').remove()
}