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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: allanh93 on April 18, 2020, 04:07:15 AM

Title: Firefox Error code: SEC_ERROR_UNKNOWN_ISSUER
Post by: allanh93 on April 18, 2020, 04:07:15 AM

Hi there,

I have just uninstalled Avast today and now I cannot browse many websites on Firefox with the following error:

Did Not Connect: Potential Security Issue
Error code: SEC_ERROR_UNKNOWN_ISSUER

I'm guessing that some of Avast's protections were not uninstalled properly? Could someone please help me fix this issue? I have already tried uninstall and reinstall Firefox.

Thanks

Title: Re: Firefox Error code: SEC_ERROR_UNKNOWN_ISSUER
Post by: Asyn on April 18, 2020, 06:18:54 AM

Follow instructions: https://www.avast.com/uninstall-utility