Although it’s still a working draft, Web Notifications have been somewhat stable for quite a while now. In fact, they are stable enough that they exist unprefixed in current versions of Firefox, Chrome and Safari. As for the first two, they have been for quite a while already.
Yet, in chat, the option “enable desktop notifications” only appears in WebKit browsers because the code checks explicitely for the prefixed window.webkitNotifications, making it not work in other browsers that support them.
I would suggest you to do something like this somewhere:
if (!window.Notification) {
window.Notification = window.webkitNotification || window.mozNotification || window.oNotification || window.msNotification;
}
And then just use the standardized, unprefixed window.Notification.
