I Click a video, and the "Save As..." Window Doesn

i was on a computer at my school monday, and i'm at a site, i click a video and this window pops up AUTOMATICALLY-

now i'm here at home, and that window doesnt pop up, the video comes up in another video, i have to right-click and click "Save Link As..."
annybody know how to fix this?
I'm Using Mozilla/Firefox

Its to do with your file association's, most likely in WMP.

Its to do with your file association's, most likely in WMP.

yeah but it usually does it with every file

with mozilla firefox, go to tools > options, then click on download. on the bottom of the frame, there's a "file type" list. Click on the video extensions (WMV, AVI), and click change action

I hope it's clear, cause I'm translating from my French Firefox, so maybe the words aren't exactly the same.

It says that in the English version too alex. You don't fail.