This is pretty straight forward but I’d really like the download bar to close after completion of downloads. If you want to keep something on the screen as a reminder, may I suggest an icon above the bookmarks? I’d like to see it close immediately after d/l is complete, or maybe have a time setting users can select how long until it closes.
Another good addition would be a keyboard shortcut as many people don’t use mice while on some pages, so closing it can be a bit of a pain in the back, especially if users are very efficient in using keyboard only browsing (using shortcuts).