Hello! I am currently experiencing an issue related to certificates in Waterfox and it is Adguad that is causing the issue; disabling adguard does fix the issue.
The server is currently down, I will follow the guide when the server issue is fixed. Thank you very much.Hi.
Since Waterfox is a FF fork you can follow these instructions to get the issue resolved: https://kb.adguard.com/en/windows/solving-problems/connection-not-trusted