Playing .ASX files via/within Firefox ?

[Ronald F. Guilmette]

I've been trying to look at California Dept. of Transportation webcams
using Firefox on FreeBSD and so far it simply ain't workin'.  Somebody
please tell me what I'm doing wrong.

Yes, I already installed the mozilla-mplayer port.

Here's where you can get at the webcams:

http://www.dot.ca.gov/dist3/departments/traffic/cameras/

Any help would be appreciated.