Orbit Downloader, leader of download manager revolution, is devoted to new generation web (web2.0) downloading, such as video/music/streaming media from Myspace, YouTube, Imeem, Pandora, Rapidshare, support RTMP. And to make general downloading easier and faster.

Orbit Downloader supports HTTP/FTP/HTTPS/RTSP/MMS/RTMP protocols and provides a total solution to download rich media. So you can download music and video from social music/video websites including Pandora and YouTube more simply and easily.
Orbit Downloader (...)

Video DownloadHelper is a tool for web content extraction. Its purpose is to capture video and image files from many sites.

Just surf the Web as you are used to, when DownloadHelper detects it can do something for you, the icon gets animated and a menu allows you to download files by simply clicking an item

For instance, if you go to a YouTube page, you’ll be able to download the video directly on your file system. It also works with MySpace, Google videos, DailyMotion, Porkolt, iFilm, DreamHost and others.
Video DownloadHelper (...)

The Download Manager Tweak extension streamlines the current Firefox download manager. The extension allows the Firefox download manager to be opened in a separate window, the sidebar, or a tab. The extension also modifies the default appearance of the download manager to make it more concise and intuitive.
Download Manager Tweak extension (...)

Allows to choose if you want to view a “PDF” file inside the browser (as PDF or HTML), if you want to view it outside Firefox with your default or custom PDF reader, or if you want to download it!
PDF Download (...)