A good start, but I haven't decided if it's useful enough to keep. I'll agree, Download Statusbar (S3) was nearly ideal and I miss it more than any other extension I lost.

But reviewers need to realize that the new extension API greatly limits what an extension can do. This status bar is literally having to display itself as part of the web page instead of a widget on the Firefox bar itself. I'm not sure that this is ultimately a viable approach for me.