Mozilla Firefox has built-in features to save Flash movies. When viewing a web page:

1. Right-click on the web page;
2. Select View Page Info;
3. Switch to the "Media" tab;
4. Select the Flash movie you want to save;
5. Click Save As.

To browse the Flash movies cached by Firefox, you can use SWF Cache Viewer which comes with Flash Saving Plugin and SWF Opener.