/usr/share/ca-certificates/mozilla/OpenTrust_Root_CA_G3.crt is in ca-certificates 20161130+nmu1+deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | -----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
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