/usr/share/mozilla/extensions/{aa5ca914-c309-495d-91cf-3141bbb04115}/autofillForms@blueimp.net is in xul-ext-autofill-forms 1.0.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/mozilla/extensions/{aa5ca914-c309-495d-91cf-3141bbb04115}/../../../xul-ext/autofill-forms