You need to have used Aria2 before to use this. With downloadThemAll, I install plugin and go [unfortunately doesn't work with new Firefox].

My first issue is that I get a blank window when I click on a download link.
The second issue is if I right-click on the blank popup, the text appears, but there are file input boxes, but no browse button integration. This basic ability to click browse and use the file selection dialog box should be made available.