Modern browsers (Chrome, Firefox, Edge) no longer support the NPAPI plugin required to run Java Applets. To use Java 6 in a browser, you typically need an older version of Internet Explorer or a specialized "Pale Moon" browser. Security Warning
FROM openjdk:6-jdk-slim COPY legacy-app.jar /app.jar CMD ["java", "-jar", "/app.jar"] jre-1-6-0- version -windows-i586.exe