Rated 4 out of 5 stars

Lets you remove all single-key commands that are inexplicably forced upon us by Thunderbird. Just click "Unset singles" and change everything to "unset" (unless you like Gmail shortcuts).

Finally, a replacement for "Dorando keyconfig"! Thank you! No more accidental archiving or marking as junk.

I'm dinging it one star for ease of use because there are no instructions in the add-on itself. It works great, though. The documentation is a little thin, and requires some effort to figure out how to make your own shortcuts, if you're into that kind of thing. Mostly, I just wanted to get rid of the single button shortcuts, which this does easily.