The roads I take...

"Jökulsárlón" is an Icelandic glacier lagoon that has pieces breaking off the glacier and swimming through it as icebergs on their way to the sea, just like files through the download manager.

My newest add-on for Firefox 4 and SeaMonkey 2.1 is using this code name and makes the download manager UI run inside a browser tab and in a tabular style similar to what SeaMonkey is using. It also supports the use of progress windows instead of the download manager if preferred.



This is using the code I wrote earlier for SeaMonkey's download manager and even progress window UI, those interested in the actual code find it in the add-on source repo.

I'm not planning to backport this code to older versions than Firefox 4 or SeaMonkey 2.1, any time I put into this id better spent on improving what's there and I'd rather convert more of it to use things like Services.jsm, which only exists in Mozilla 2 code.
I will also not backport this work to SeaMonkey due to the discussions that had been going on around the progress windows. I'd happily support people porting code though - and I'd also accept patches to improve the add-on if anyone wants to help, of course.

And for everyone else, if you're interested in a download manager running inside a tab in a tabular interface, please test this add-on and give feedback!
Right now, it's not reviewed for public on AMO yet, it's in the sandbox, but that shouldn't stop you from testing it - feedback comments improve the chances of the add-on being made public!