I think Mozilla (well, i'm a FireFox user) needs a better download manager.
ConnectFusion is a GPL'd download manager. Check it out.
ConnectFusion is a very fast open source download manager. It will accelerate your downloads from the Internet and resume broken connections. ConnectFusion includes an easy-to-use interface and its installation does not interfere with the normal behavior of your browser.ConnectFusion is 100% free, never expires, and does not contain any spyware or advertisement. Its source is freely available to any one who wants to inspect or modify it.
Features of ConnectFusion
* Accelerate downloads for different types of Internet connections - dial-up, cable, DSL / ADSL, satellite, T1, etc. * Supports simultaneous connections. Up to 8 connections for the same file. This method will speed up your downloads significantly. Stop and resume broken downloads. Recover from a dropped Internet connection. * Does not interfere with the default behavior of web browser. * Supports batch downloads from the Internet. Perform batch downloads by queuing multiple files and leaving your system totally unattended. * Drag & drop features. Drag a link into ConnectFusion to download. Drag a file from ConnectFusion into a folder to save. * Well designed interface. Compact, Stable and Easy to use. * Totally free. Never expires. No spyware. No advertisement. * Open Sourced. Inspect the code and compile it yourself for the ultimate peace of mind.
The source code for ConnectFusion is under GPL (GNU General Public License). You are required to release your source code if you distribute products that are derived from ConnectFusion's source
I mean it's Windows-only and takes up 4MB of space. Whereas Firefox is cross-platform as is designed to not take up as much space.
If you want advanced functionality, you can just download whatever download manager you want and plug it in. There's no reason to put it into the Firefox codebase.
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