Deepest Sender...
… is apparently an anagram — though I don’t know of what. More importantly, it’s a LiveJournal client that runs in Mozilla Firebird. It’s based on the default Windows client, but I’m typing this at the moment in it running in Firebird on Linux. How cool is that?
You can find the Firebird extension on the extensions page, and its homepage at [deepestsender.mozdev.org/.](http://deepestsender.mozdev.org/.)
Turns out there’s another one, too, called LiveLizard. And the more I see of the Mozilla Project’s XUL, the cooler I think it is.