preface: Sometimes when we visit some websites, especially when the certificate expires or the certificate and domain name do not match, we will prompt: Warning: facing potential security risks! Firefox has detected a potential security threat, so it has not continued to visit www.xxxx.com. If you visit this website, an attacker may try to steal your password, email, credit card and other information. What can you do? This problem is mostly related to the website and cannot be solved through your operation. You