I really hate web pages that have a Java web app on them.  Especially since the days of being able to run them are going to be going away shortly.  Currently, Firefox ESR 52 32-bit allows you to run them, but once they move the ESR to the next version the ability to run them goes away.  HTML5 pages are much better, to bad legacy network gear (I’m looking at you old HP ProCurve at work) will never be updated……