document.all is IE-specific script. Cisco would have to redo their code to be more browser-neutral. ->TE
Do you have a cisco support contract? Open a case, report the bug, and ask them to create a publically viewable bug. It works! I did this and the Cisco SDM is being modified to work with Firefox as we speak. Email me if you want me to post details.
This looks like a dupe of bug 248018 to me.