I've ported away from mozdev.org some time ago and I also needed a smart way to redirect from there to my new hoster. I used a hack like this:
http://www.mozdev.org/source/browse/~checkout~/prefbar/www/local.conf
Most probably you only need the two "header" lines. This change redirects anything to a new domain. But you have to keep the files on the mozdev.org webspace to prevent a 404 error.
2013-04-22 07:53