See

• javascript_enabling-and-disabling-javascript
• use firefox button -> options ->|Content| ->[] enable javascript

Does that work, or are you trying to do something else.

I apologize - my question was incomplete. I thought that I had more in the body of the question.

I am running Firefox on a XOOM (android device). I cannot find a java plug in that runs with it, and when I touch the firefox button, I don't get a menu, instead I get a message stating "this web sited does not supply identity information"

Sorry, I did check the Android faq, but do not use android devices myself, I will leave it to others to try to answer.

Oracle does not produce a Java plugin for browsers on Android. Given that Google and Oracle are currently engaged in a lawsuit involving Android I don't expect Oracle to produce any Java plugin for Android.