The size of the status bar increase when you increase the webpage zoom, so if you are in a website with a zoom of 150% then you end getting a big, biiiiiig status bar... too bad.

Another bad thing is that the colors are not personalizable via the settings window, it has a light and dark theme but dark theme is horrible, its just black background and black downloads, everything black... it should be black background and green downloads at least, or make the colors personalizable.

And of course the major problem that people already commented is that the status bar covers content of the webpage.

Anyways this is a nice addon for those who needs something similar to the legendary Download Status Bar for Firefox legacy.