http://www.flash-video-converters.com

Sothink SWF Catcher for Firefox is a free Firefox extension that allows users to easily save multiple Flash-based contents such as charts, presentations, games, and movies with just one click.

Firefox's Web Video Downloader is a free tool for downloading FLV videos from YouTube and other sites. It syncs with video download pages, downloads fast, and offers the latest hot video information.