How do I install on ubuntu 21.10 the AdoptOpenJDK /IcedTea-Web via git-hub?

[mampadv]

I'm a novice github user. I need to integrate firefox esr with AdoptOpenJDK /IcedTea-Web

I need to sign government documents with extensive .jnlp

I use Ubuntu 21.10 and Firefox ESR 91 64 bit.

How do I install from git-hub AdoptOpenJDK /IcedTea-Web using Ubuntu 21.10?

[sclassen]

You can find the Adopt binaries here: https://adoptopenjdk.net/icedtea-web.html

[sclassen]

But be aware that FIrefox does not support applets: https://www.java.com/en/download/help/firefox_java.html

[sclassen]

If you are simply trying to run an web start application (not an applet) then the simplest way is to use https://github.com/karakun/openwebstart