Via: http: Down Them All!
This is handy for downloading everything on a page…unattended…
DownThemAll (or just dTa) is a powerful yet easy-to-use Mozilla Firefox extension that adds new advanced download capabilities to your browser.
It lets you download all the links or images contained in a webpage and more: you can refine your downloads by fully customizable criteria to get only what you really want.
Read more: here