Rated 3 out of 5 stars

Seems to work find but it lacks one major function that stand-alone download managers offer. The ability to enter and save a username and password for sites that require login for downloads such as hotfile and rapidshare.

This review is for a previous version of the add-on (2.0.1-signed). 

DownThemAll! will happily use stored passwords and cookies of Firefox. There is no need for a separate password manager.