/usr/share/ca-certificates/mozilla/UTN_USERFirst_Email_Root_CA.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 15 16 17 18 19 20 21 22 23 24 25 26 27 | -----BEGIN CERTIFICATE-----
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USeh1YdV8nuPmD0Wnu51tvjQjvLzxq4oW6fw8zYX/MMF08oDSlQ=
-----END CERTIFICATE-----
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