Firefox Users Help!

I currently user Opera but decided to try Firefox. The one thing thats stopping me from changing over is that when you do "save link as" it always saves the link as a weird file, never just a mp3 as Opera or IE would. For example go to the link below and try and save the attachment to your computer. It ends up being named attachment (I know I can rename), and as a wierd file like .php or something. How do I fix this?

Test Link:
Classic Al Green Flip - Future Producers

u need to login to download the attachment from that site, i believe....

Shouldn't be as I can download without logging in, in Opera.

The problem was solved. Just in case someone else has a similar problem, look at the link below.

Firefox Help - Tech Support Guy Forums

if i was here earlier i wulde have juss said to download a built in download manager so that u dont have to rite click it and u juss click it and it gives u choices..

go into the options and change ya DL settings