Rated 4 out of 5 stars
Version 1.18 and 1.19 are broken. I am using version 1.17 from here: https://addons.mozilla.org/en-US/firefox/addon/download-flash-and-video/versions/
This review applies to Download Flash and Video 1.17.
Unlike other downloader addons, this one supports many web sites and formats, including the obvious such as YouTube and Blip.tv. The UI is simple, but effective, and it even has an option to use DownThemAll instead of Firefox's built-in download manager. The only thing I dislike about this addon is that there is no quick way to hide/show the icon. You need to right-click somewhere on Firefox's interface > Customize > and then drag the icon on or off.Hopefully version 1.20+ will continue to work with Firefox.