On my PC when trying to connect several sites I receive a message that the response telling me that the authenticity of the data received couldn't be verified this only happens on my PC I'm running Windows 7 pro can connect on my Android phone
- User Agent: Mozilla/5.0 (Android 6.0.1; Mobile; rv:68.0) Gecko/68.0 Firefox/68.0
I'm running Windows 7 pro
What's your Firefox version?
There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.