Hi all, I am having the "SEC_ERROR_UNKNOWN_ISSUER" error on every website in Firefox only. I tried everything I could to resolve this: - Removed the personal certificate from firefox, because it was already there and manually installed it again - Reinstall firefox, installed the personal certificate manually. - Tried a portable firefox, also installed the personal certificate manually there - Reinstalled Adguard Somehow, none of these things solve this issue but other browsers are working normal. The problem now even persists whenever I remove Adguard from my system totally and reboot. Basically, there is now way for me right now to use Firefox because of this, its a bit annoying. I am using the latest Firefox 64.0.2 64bit, on Windows 10. Anyone has any suggestions, please?