The roads I take...

As I mentioned before, I started working on the SeaMonkey UI for the toolkit download manager backend.

In the last few days, I have progressed a lot on that, as one can easily see from the pushlog on the hg repository I created for backing up that work (and having the code out there if someone wants to test).

Here's a current screenshot of my work:



All the commands in the context menu are being activated and deactivated as they should and they are also all working as they should (that is, in SeaMonkey they probably are, opening the home page fails in Minefield, as SeaMonkey's utilityOverlay functions apparently can't open Firefox tabs). Also, the download progress is updated as it should, in the tree as well as the download manager window title.
What's not working yet is the toolbar commands (i.e. search and clear list) as well as sorting. Those are convenient and will of course be implemented before this can go into SeaMonkey (well, we haven't even switched the backend itself yet), but even without those, the download manager is already pretty usable.

If you want to test, just pull the repository, move/copy/symlink the dlmgrui@kairo.at directory in your Firefox profile's extensions/ directory and make sure the symlinks in its communicator/ subdir point to the right SeaMonkey files (or place copies of comm.jar, classic.jar and en-US.jar there).
Having done that, you should be able to launch your Shiretoko or Minefield copy and get this tree-based SeaMonkey download manager whenever the toolkit download manager should else be launched.

Of course, this is an add-on I'm only doing for development of the new SeaMonkey UI, I have no intention of making this a real Firefox add-on but to merge it into SeaMonkey code in the future - once we have the toolkit backend and this isn't WIP but a reviewed patch instead.