/usr/share/mozilla/extensions/{3550f703-e582-4d05-9a08-453d09bdfdc6}/{b676e3ff-cda7-4e0c-b2b8-74e4bb40a67a} is in xul-ext-mozvoikko 2.0.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/mozilla/extensions/{3550f703-e582-4d05-9a08-453d09bdfdc6}/../../../xul-ext/mozvoikko