Great job and a lifesaver! Not to belabor suggestions others have made, but here are my top 3 requests:

1) Make bar thinner in a manner similar to the old Download Status Bar extension by only displaying a single line of text and using tooltips to offload supplemental info. While download is in progress show a broken file icon, download speed, time remaining, and percent complete (or have option for user to choose 3 datums to display). Notice that filename doesn't display during download. When download completes, just display the file icon + name. All other data (file size, location, etc) can be displayed in tooltip.

2) Auto-clear (or have option to do so) when choosing Show in Explorer. Once I have gone to the file and started to work with it, I no longer need it in the status bar and having to explicitly clear it is just wasted mouse clicks.

3) See about injecting the status bar on all tabs. I keep dozens of tabs open at any one time and cannot keep track of which downloads are where.

Five stars if you manage to implement these!