Not stable. Crashes. Rated 1 out of 5 stars

The add-in downloaded and installed ok. I opened the FF Download Manager and the new add-in showed up. Then it took an extraordinary long time to fill in. Clicking on files in the list took 10 - 20 seconds to respond. Finally it crashed.
I'd stay away from this for now. It's just not stable enough for me.

This review is for a previous version of the add-on (0.9.5.1-signed).