There's a Perl-language converter tool available there, for those that don't have Go handy for the extract-nss-root-certs tool.
And there's also a shell script there that uses the certutil tool [2] that can be used to extract the Firefox certificate store.
[1] http://curl.haxx.se/docs/caextract.html
[2] http://www.mozilla.org/projects/security/pki/nss/release_not...