How to trust Puma-dev CA certificate in Firefox

Firefox doesn’t use system certificates, so we need to import the certificate manually.

How to import the certificate manually

Preferences > Advanced > Certificates mini-tab > “View Certificates” button > Authorities mini-tab > “Import” button > cert.pem

Source: https://support.mozilla.org/en-US/questions/1068675

Alternative way

about:config > security.enterprise_roots.enabled = true

Source: https://support.mozilla.org/en-US/questions/1175296

macOS

It’s possible to drag and drop certificates from Finder to Keychain Access.

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