Doesn't work with FF 13? Rated 1 out of 5 stars

Installed and ran it, but it doesn't seem to create any files. I've tried with all permutations of HTML, text, HTML, different drives, etc. but I click save, the window just closes. There's no notification, and no files appear to be created anywhere, either.

Is there some configuration setting I need to be aware of to make it work?