Forget this add-on. It's abandoned since 2013 and doesn't even work properly with FF43+ Rated 1 out of 5 stars
A working alternative (down to the dialogs looking almost the same) based on this add-on is "Mouse Gestures Suite":
It'ss also available here on AMO, search for the name or go straight here: https://addons.mozilla.org/de/firefox/addon/mouse-gestures-suite/
Rated 5 out of 5 stars
Works like a charm.
I changed over from the Mouse Gestures Redox addon when that was abandoned a some years ago and I didn't regret it ever since.
I'd really like to use AiOG in Thunderbird too, so I'd like to try hacking it for making it work with TB.
Anyone try that yet, and If yes, did it work?
Would it be enough to hack only the install.rdf or is it necessary to fiddle with the .jar file (I'm not much of a Java coder, so that could be a problem)?