I have ideas to improve the experience of what is certainly one of the most useful Mturk scripts ever written.
1. Could the desktop notifications have the same information on them as the browser notifications, such as TO and accept links?
2. If not, could it be done that the browser notifications always have priority over the desktop? It seems to be that the last one to go off takes priority, which can be distressing when you're trying to snag a hit fast. Obviously, not an issue at all if the desktop notifications are more fully-functional, as per item 1.
3. The browser notifications will periodically cycle after a few seconds. first in, first out. While this is useful in many instances, it's frustrating when the hit you're after is pushed off the notifications as others come in. Could you make it so that you can customize the cycle length of the notifications? Having it pause its cycling on mouseover would be really great, too.
Anyway, like I said, excellent script, even as it is.