modutil
Manage PKCS #11 module information within the NSS security module database. tldr-pages
On several platforms
Several platforms
Add a PKCS #11 module to an NSS database (e.g. a Firefox profile: $HOME/.mozilla/firefox/default-release)
modutil -dbdir sql:path/to/nss_database_directory -add "module_label" -libfile path/to/pkcs11_mod.soIdentifyList PKCS #11 modules in an NSS database
modutil -dbdir sql:path/to/nss_database_directory -listIdentify