Well, it could have something to do with Firefox version 3 vs. version 2–openSUSE uses 3, and i am assuming that Debian uses 2.
Sometimes I can view mms streams in FF, sometimes not–I think some of it depends on how the website was coded. If all else fails, though, you can copy the link, open a shell (like Konsole), and use mplayer to view it:
I used that recently to view a video. You can also save to disk using mimms.
but generally I don’t know url of streaming; I need too to build a simple system useful for an opposite-linux-user; however debian sid I used had FF3.
the string addresses the player you want play; the point is in suse I don’t find the command to open programs (in debian are in usr/bin)