/usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/{e4a8a97b-f2ed-450b-b12d-ee082ba24781} is in xul-ext-greasemonkey 1.15-1~deb7u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/../../../xul-ext/greasemonkey