Rated 5 out of 5 stars

...what else? It has everything I was searching on a Download Status Bar. It fits perfectly on FF window, you can hide it, make it bigger or smaller. It shows a lot of info on the pop-up window and you can choose the details to show on the bar.

Ah! And it is working with current Nightly build (Firefox/48.0)

This review is for a previous version of the add-on (13.4.2.2).