In Add-ons > Plugins, "Java(TM) Platform SE (version)" is all that needs to be enabled. I should be there if you have Java installed. If it is not there, you need to install Java. I do not see the item in the Plug-ins submitted with your question, so you either have Java disabled or it is not installed on your system.
See --> Installing or Updating Java in Firefox
If JavaScript is the problem, you need to check your settings. JavaScript is not Java.
- JavaScript settings: Options > Content, "Enable JavaScript" must be checked.
- JavaScript is not Java; see the following
If you have NoScript or some other Java-blocking or script-blocking add-on installed, you need to check the settings for that add-on.
If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.
Not related to your question, but...
You may need to update some plug-ins. Check your plug-ins and update as necessary:
In Add-ons > Plugins, "Java(TM) Platform SE (version)" is all that needs to be enabled. I should be there if you have Java installed. If it is not there, you need to install Java. I do not see the item in the Plug-ins submitted with your question, so you either have Java disabled or it is not installed on your system.
See --> [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]
If JavaScript is the problem, you need to check your settings. '''JavaScript is not Java.'''
*JavaScript settings: Options > Content, "Enable JavaScript" must be checked.
*JavaScript is not Java; see the following
**https://support.mozilla.com/en-US/kb/JavaScript
**http://kb.mozillazine.org/JavaScript_is_not_Java
**http://www.htmlgoodies.com/beyond/javascript/article.php/3470971/Java-vs-JavaScript.htm
If you have NoScript or some other Java-blocking or script-blocking add-on installed, you need to check the settings for that add-on.
'''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''
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Not related to your question, but...
You may need to update some plug-ins. Check your plug-ins and update as necessary:
*Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/
*Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.com/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox]
*Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox]
*Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox]
*Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]
