This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

How to make Firefox trust a self-signed certificate in Mac root certificate authority?

  • 4 replies
  • 0 have this problem
  • 1 view
  • Last reply by Terry

michaelnz10
michaelnz10
more options

I'm a web developer working on an app running in Docker on my MacBook. Chrome, Edge and Safari trust the self-signed certificate that has been imported into the Mac's root certificate store and have no security issues, but when I try and access the web app, I'm hit with "Warning: Potential Security Risk Ahead" and the error code is MOZILLA_PKIX_ERROR_CA_CERT_USED_AS_END_ENTITY

I really miss Firefox, particularly the multi-account containers feature. What do I need to do so that Firefox will trust my certificate for my local web app?

I'm a web developer working on an app running in Docker on my MacBook. Chrome, Edge and Safari trust the self-signed certificate that has been imported into the Mac's root certificate store and have no security issues, but when I try and access the web app, I'm hit with "'''Warning: Potential Security Risk Ahead'''" and the error code is MOZILLA_PKIX_ERROR_CA_CERT_USED_AS_END_ENTITY I really miss Firefox, particularly the multi-account containers feature. What do I need to do so that Firefox will trust my certificate for my local web app?

All Replies (4)

Dropa
Dropa
more options

Sounds like the certificate isn't in the registered database as currently accepted certificate here.

https://support.mozilla.org/en-US/kb/setting-certificate-authorities-firefox# https://support.mozilla.org/en-US/kb/secure-website-certificate#

michaelnz10
michaelnz10 Question owner
more options

The certificate has CA:true set in it. Will this be a problem?

Dropa
Dropa
more options

You have to contact the certificate maker or authorization - Firefox forum can't fix bad certificate or invalid certificate checks.

Modified by Dropa

Terry
Terry
more options

You could try removing cert9.db with Firefox closed.

https://support.mozilla.org/en-US/questions/1419999 https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data#w_finding-your-profile-without-opening-firefox