How to use the certificate for Tomcat

Hi thanks much @melo for this solution. LetsEncrypt works great now in my environment for Chrome browsers. The problem is that it doesn’t work for Firefox. I’m looking at @eswn’s solution for the FF problem in Apache here: Cert not work in firefox. But importing the chain file he refers to to my java keystore does not resolve the firefox problem. How do I get LetsEncrypt working correctly for tomcat and Firefox?