Here's how to disable Java in Firefox.
Firefox v3.5 and below:
Windows users: open Firefox and click Tools | Options. Click the Content tab and uncheck Enable Java
Mac users: open Firefox and click Firefox | Preferences. Click the Content tab and uncheck Enable Java
Firefox v3.6 and above:
Windows and Firefox users: open Firefox and click Tools | Addons. Click the Plugins tab, locate each of the Java plugins, and click the Disable button for each.
- Mac users, just close the Preference dialog to save the changes. Windows users, click OK.
- When you encounter a site that requires Java (for example, some website games and calculators), you can re-enable Java easily by following the same steps above, only this time choosing to enable instead of disable. Be sure to re-disable Java when done.