Hi

Which add-ons do you have installed in Firefox for Android? One if them may be causing scripts to be blocked on the page you are trying to view.

As said there are some Extensions that can give you control of JavaScript in Firefox like NoScript and uBlock.

how do i add java support to firefox?

Note JavaScript and Java are two completely separate things. Would have been better if JavaScript kept what was to be the original name of LiveScript so there was no confusion between the two things.

https://kb.mozillazine.org/JavaScript_is_not_Java