I'm struggling to update the local SSL certs for Chrome and Firefox in Monterey 12.6.

Specifically, I updated my local development server's SSL certs and "Always Trust"ed them in the Keychain Access as directed here.

Locally it works in Safari and Brave (which had never seen the old SSL cert), but Chrome and Firefox are always giving SSL cert errors (Chrome: NET::ERR_CERT_AUTHORITY_INVALID). I've tried fully clearing the All Time browser history as well as incognito/private which other posts recommend, but it hasn't worked yet.

1 Answer 1


I started over even after fully reinstalling Firefox (manually removing all plist, cache dir's, folders).

I needed to run mkcert -install which I'm not sure how it was lost previously but that was it.

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