Hello! For few minutes it says "Performing a TLS handshake to youtube.com", then this message appears: ======== Secure Connection Failed The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. What can you do about it? The issue is most likely with the website, and there is nothing you can do to resolve it. You can notify the website’s administrator about the problem. ======== What I did so far: 1. Deleted cache and site data for youtube.com. 2. Checked if date and time setting is set to auto and synced it just in case. 3. Tried restarting firefox in safe mode. 4. Tried turning off ocsp stapling. 5. Deleted ALL cache and site data. 6. Tried creating a new profile. 7. Set HTTPS-only mode to "don't enable" and added youtube.com to exceptions I do use DoH. I can't not use it. YT won't work without it for sure. Provider is google: https://dns.google/dns-query Everything works fine in Chrome (yes, I use DoH there too).