Author Topic: Firefox Error code: SEC_ERROR_UNKNOWN_ISSUER  (Read 400 times)

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Offline allanh93

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Firefox Error code: SEC_ERROR_UNKNOWN_ISSUER
« 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

Offline Asyn

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Re: Firefox Error code: SEC_ERROR_UNKNOWN_ISSUER
« Reply #1 on: April 18, 2020, 06:18:54 AM »
Win 8.1 [x64] - Avast PremSec 20.10.2439.Beta#2 [UI.580] - CC 5.74 - EEK - FF ESR 78.5 [NS/AOS/uBO/PB] - TB 78.5 - SB/CP/SL/DU.B
Deutschsprachiger Bereich -> Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0