Make sure your Java (Not JavaScript) is up to date Verify Java and Find Out-of-Date Versions {web link}

Version 8 Update 65 Release date October 20, 2015 http://java.com/en/download/manual.jsp

So sorry, but this doesn't answer the question. Pogo.com is posting this at the top of their games:

Firefox browser version 42 is not working well with Java Version J8U65. We recommend using the latest version of Internet Explorer 11

I haven't updated to 42 for the reason above. Many of us do Pogo games on their site. My question is:

Is Firefox browser version 42 compatible with Java version J8U65 and Java Version J8U66?

Thank you for your research and answering this question.  :-)