Hi. For what it's worth, I think a user may probably disable mozpluggerrc through a custom mozpluggerrc placed in the right user's directory (for instance in $HOME/.mozilla/)
Hope this helps. Best regards, -- Olivier BERGER (OpenPGP: 1024D/B4C5F37F) APRIL (http://www.april.org) - Vive python (http://www.python.org) Pétition contre les brevets logiciels : http://petition.eurolinux.org