Turn Off Java Applets in Firefox

Java Applet Help for FirefoxWant to disable Java applets in Firefox? There are a few reasons you might want to do this – from troubleshooting a problem to just disabling an annoying feature on a website.  Here are the steps you need to take to turn off Java applets in Firefox.

  1. At the top of the Firefox window, click on the Firefox button (Tools menu in Windows XP), and then click Add-ons. The Add-ons Manager tab will open.

  2. In the Add-ons Manager tab, select the Plugins panel.
  3. Click on the Java Platform plugin to select it.
  4. Click on the Disable button (if the button says Enable, Java is already disabled).

Once this has been done, Java applets will no longer be able launch from within Firefox.  Now that you know how to disable them, I feel like I should provide you with a little more information about what Java applets are:

A Java applet is an applet delivered to users in the form of Java bytecode. Java applets can be part of a web page and executed by the Java Virtual Machine (JVM) in a process separate from the web browser, or run in Sun’s AppletViewer, a stand-alone tool for testing applets. Java applets were introduced in the first version of the Java language in 1995, and are written in programming languages that compile to Java bytecode, usually in Java, but also in other languages such as Jython, JRuby or Eiffel (via SmartEiffel).

Another important distinction that should be made is the fact that Java applets and JavaScript are two different things.  JavaScript will still run, no matter if Java applets are disabled or not.  I know some of this information might be aimed a little over some of your heads – but it is a good thing to know, when you need it.

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