/usr/share/mozilla/extensions/{a23983c0-fd0e-11dc-95ff-0800200c9a66}/{73a6fe31-595d-460b-a920-fcc0f8843232} is in xul-ext-noscript 2.9.0.11-1~deb8u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/mozilla/extensions/{a23983c0-fd0e-11dc-95ff-0800200c9a66}/../../../xul-ext/noscript