Rated 4 out of 5 stars

Как настроить папку для сохранения скаченных файлов?
(How to configure a folder to save downloaded files?)

This review is for a previous version of the add-on (3.5.1.1-signed). 

Go to about:config, add the string "extensions.openDownload2.downloadPath" and set it to the folder you wish. :-)