To avoid confusion: *http://kb.mozillazine.org/JavaScript_is_not_Java Do you really mean the Java plugin or do you have a problem with JavaScript? In case of Java you may have to add a security exception. There has been a change in the Java security settings, see: *http://kb.mozillazine.org/Java#Java_security_prompts *"What should I do when I see a security prompt from Java?":<br>http://www.java.com/en/download/help/appsecuritydialogs.xml If you visit a website regularly then a possible workaround is to add the URL to the Java Exceptions Site List, see: *"Why are Java applications blocked by your security settings?":<br>http://www.java.com/en/download/help/java_blocked.xml *"How can I configure the Exception Site List?":<br>http://www.java.com/en/download/faq/exception_sitelist.xml