This article explains how to save flash files from a website using mozilla firefox.
1.Right click on web page and select "view page info" or click on tools and select "page info".
2.Now click the Media Tab on the Page Info Window.
3.The Media Tab will have complete list of Images, CSS Files and Shockwave Flash files of the web page.
4.Scroll down the list and locate your .swf(flash) file.
5.Click on "Save As" button. Choose some location on your hard drive and save the file.
you are done.