When you're in charge of developing websites or you must access some website whose TLS certificate has expired or is not valid anymore you might know about this problem.
The browser blocks you from accessing the website with a warning message. Sometimes you are able to skip this warning but unfortunately this is not always the case. It depends on the webserver security configuration.
But if you are using a chrome-engine based browser like chromium, google chrome or brave you can simply type
thisisunsafe and you're good to go.
Have a look at my newest TIL badssl.com to test this feature.
Credits and more information about this is available at https://cybercafe.dev/thisisunsafe-bypassing-chrome-security-warnings