This article explains how to disable the Java plugin in Firefox so that Java applets no longer run.

By default, Firefox allows Java applets to launch automatically. However, you may decide that you do not want Java applets to run. To disable Java applets in Firefox:

1. At the top of the Firefox window, click on the Firefox buttonOn the menu bar, click on the Tools menuAt the top of the Firefox window, click on the Tools menu, 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 (TM) Platform pluginJava Plug-in 2 for NPAPI Browsers (Mac OS 10.5 & 10.6) or Java Applet Plug-in (Mac OS 10.7 and above)Java plugin to select it.
4. Click on the Disable button (if the button says Enable, Java is already disabled).

Java applets will no longer be permitted to launch in Firefox.

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