Unless I am not understanding correctly, this add-on did not "activate" when I clicked a link to download a file. It still went through to the default Mozilla Firefox downloader. I was really looking for something to replace it, as this download is large and keeps failing.

I am very disappointed with this. Maybe you could add a more comprehensive guide on how to use your product... there is no obvious way to "OPEN" your add-on by clicking on the icon from the toolbar.