When a web server requires mutual TLS authentication, the default behavior of web browsers is to show a dialog that lets us choose which client certificate we’d like to use. These certificate prompts can become annoying, so browsers provide ways to suppress them: Internet Explorer and Edge Legacy offered a behavior (Don’t prompt for client certificate selection when only one certificate exists, URLACTION_CLIENT_CERT_PROMPT), on-by-default for the Local Intranet Zone. This setting can be c...
