How to fix SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE error Firefox

By | April 30, 2020

Do you experience the issuer certificate error “SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE” error in Firefox? If you see the error: SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE in Firefox, then Firefox tries to communicate through an expired security certificate. Most likely because the date and time settings on your device do not match.

Sometimes though you have to connect to the website, in this instruction I show you how to fix the SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE error in Firefox.

SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE error firefox

In this article, I will give you instructions on how to fix the SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE error in Firefox.

Read on and follow the step-by-step instructions.

How to fix SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE error in Mozilla Firefox

Check your date and time settings

Open windows control panel, go to Clock, Language, and Region.

windows control panel

Go to set time and date.

set time and date firefox

Open change date and time settings as Administrator.

change date and time settings SEC_ERROR_OCSP_FUTURE_RESPONSE firefox error

Provide the correct date and time settings, restart Firefox for the changes to take effect.

date time change date and time settings SEC_ERROR_OCSP_FUTURE_RESPONSE firefox error

Once the correct date and time settings are provided the SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE error in Firefox is fixed.

Didn’t work?

Bypass SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE firefox warning

When you are in the SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE Firefox error page. Click on Advanced, click on Add Exception and click on Get certificate.

Confirm the security exception and reload the page. Enjoy!

Thank me! Help other people. Share this information on social media, a forum or website, and contribute to a safer internet for everyone.

Max
Author: Max

Hi, I am Max. I am a computer security researcher. Every day I blog about new adware threats as they are released. I am also active in various online communities to help people with their computer problems. Stay safe!

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