Don´t you hate those websites that offer great content but only provide it streamed so you can´t download it to your computer ? Would not it be great if there was a way to download videos and other files from all those video / filehosting sites out there ? Your prayers have been heard, enter Video Downloader for Firefox.
Now what this sweet little extension does is to scan the current website for the real download links and display them in a new window. From there you can easily download the content that you like. The extension itself sits in the firefox taskbar, all you have to do is left click the icon and it will start the scan. It can´t be easier than that ?
It supports over 60 movie sites and is also capable to download most embedded content like mp3 and flash.

Firefox Download Helper Extension
Bywifi Video Streaming Downloader
Video Download Add-On NetVideoHunter For Firefox
thanks for a great plugin!
Unfortunally it can’t download from nba.com :/