DownThemAll! 2.0 Beta 4

DownThemAll (or just dTa) is a powerful yet easy-to-use Mozilla Firefox extension that adds new advanced download capabilities to your browser. DownThemAll lets you download all the links or images contained in a webpage and much more: you can refine your downloads by fully customizable criteria to get only what you really want.
DownThemAll is all you can desire from a download manager: it features an advanced accelerator that increases speed up to 400%, it allows you to pause and resume downloads at any time and, last but not least, it´s fully integrated into your favorite browser! Compatibility:

• Firefox: 3.5 – 4.0
• Seamonkey: 2.0 – 2.1a3 (limited support for the development versions, limited functionality)

What's New in version 2.0 Beta 4:

• Weighted average download speed calculation: The more recently calculated speed statistics count more towards the “average” speed.
• Better context menu integration, showing all available options (link, image, video, audio)
• Fully multi-threaded pre-allocator and file verification, less hangs with large files
• More modularization and a lot of refactoring to simplify code and improve load times
• Other performance-related changes
• Visual refresh
• Lots of small improvements
• Digitally signed release
• Additionally a lot of bug fixes were made since beta 3.