Let's Encrypt certificate not trusted on Firefox
问题 I just added the certificate in IIS 8 (Windows Server 2012) using letsencrypt-win-simple.V1.9.1 . There are no problems in Google Chrome but in Firefox the connection is not trusted. I followed this tutorial : https://weblog.west-wind.com/posts/2016/feb/22/using-lets-encrypt-with-iis-on-windows#TheEasyWay:LetsEncrypt-Win-Simple . 回答1: Upon cursory examination, it would appear that you have a valid SSL certificate installed and configured. However, more thorough analysis courtesy of the