Download Status Bar - Download Status Bar manages every aspect of your downloads (Launch, Show, Scan, Send To, Rename...
Download Manager (S3) - View and manage downloads from a tidy statusbar.
DownThemAll - DownThemAll is a free extension for Firefox that is designed to allow you to download multiple links or files on a page without having to click each link.
JDownloader - JDownloader is a free downloading tool that enables you to download files from over a hundred hosting sites. The tool is compatible with Linux, Mac and Windows operating systems. Read more about JDownloader.
Status-4-Evar - That status bar was removed in Firefox 4.0.
Free Download Manager - It is a powerful modern download accelerator and organizer for Windows and Mac.