Sothink Web Video Downloader for Firefox is a perfect extension for your Firefox that will capture, download and save video files for you.
    With this amazing download manager you get optimized speed and accuracy in capturing, downloading and saving videos from YouTube, Google, MSN and almost all popular video sites. This free to use video downloader for your Firefox comprises cross-platform compatibility, supporting Windows, Linux and Mac OS X (x86) or Mac OS X (PPC). The tool supports downloading video in various formats like: FLV video, WMV, ASF, AVI, MOV, RM and RMVB video, and much more. The tool can prompt you whenever it detects any new videos from a current browsing page by a dynamic icon on Firefox toolbar. Free from any type of adware, spyware or banners this tool stands as the best in the crowd.
    With many more features Sothink Web Video Downloader for Firefox can automatically store history of downloaded and captured video and Flash files.