Hi Chuck,
New user, and thought I'd say your extension is really an excellent tool.
I do have a request, which may already be solved, however...
I normally make back-ups and use gMail and other physical media for storage.
When making backups, I noticed the Results .html file has the creation date/time in it. However, the .xpi and .fbu do not.
I believe it would be much cleaner if the extension would add the creation date/time to the .xpi and .fbu as well.
I just read that one is able to set time-stamped directory for back-ups with-in FEBE which in some ways solves this problem.
I would prefer to have a single directory if possible though, any chance you might consider this request?