This file is indexed.

/usr/lib/thunderbird-devel/sdk/lib/libnss3.so is in thunderbird-dev 1:52.8.0-1~deb8u1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/thunderbird-devel/sdk/lib/../../../thunderbird/libnss3.so