/usr/share/mozilla/extensions/{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}/{20d36f97-15da-47ed-9f0a-13cbe85bdc84} is in xul-ext-y-u-no-validate 2013052407-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/mozilla/extensions/{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}/../../../xul-ext/y-u-no-validate