Install icedtea-8-plugin by entering the following commands in the terminal:
sudo apt update sudo apt install icedtea-8-plugin
Description:
web browser plugin based on OpenJDK and IcedTea to execute Java applets
IcedTeaPlugin is a web browser plugin to execute Java applets, supporting LiveConnect/JavaScript. It is targeted for xulrunner-1.9 and compatible browsers that support the NPAPI.
Homepage: http://icedtea.classpath.org/wiki/IcedTea-Web
Version: 1.6.2-3.1ubuntu3
Section: universe/web