/usr/share/mozilla/extensions/dlm@emusic.com/{73a6fe31-595d-460b-a920-fcc0f8843232} is in xul-ext-noscript 2.6.8.19-1~deb7u2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/mozilla/extensions/dlm@emusic.com/../../../xul-ext/noscript