what i'm doing is essentially busting the underlying javascript - it's a hack, and if you abuse it, you could create a buffer overflow. so, it's possible that some future or existing version of firefox might plug the hole i'm exploiting to allow the thing to work without a specialized script. but, i'm obviously not on the bleeding end of things, and i'm not going to be concerning myself with this too much until it shows up in front of me - all i can do is test it on the equipment i have, and point out that the nature of the player is that it is a hack and it might not work in the future.
i'd call on the html5 standards people to integrate playlist functionality naively, so i don't have to break it to get it to work without a script.