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In light of the variety of Java exploits available, it is best to disable Java whenever possible.

Microsoft Windows

To Disable Java in Internet Explorer on Microsoft Windows

1. Open Internet Explorer.

2. Go to Tools on the menu bar and select Internet Options.

3. Go to the Programs tab.

4. Click Manage add-ons.

5. Scroll until you find Java Plug-in. Click it and then click Disable.

6. Click any other items with a Java Plug-in label and click Disable until they are all disabled.

To Disable Java in Mozilla Firefox on Microsoft Windows

  1. Press Firefox button
  2. In the Add-ons Manager, go to Plugins and click the "Disable" button next to anything named "Java".

To Disable Java in Google Chrome on Microsoft Windows

  1. In the address bar at the top of your web browser, type in chrome://plugins/ 
  2. Scroll down to Java and click disable.

To Disable Java in Opera on Microsoft Windows

  1. In the address bar at the top of your web browser, type in opera:plugins
  2. Scroll down to:
  • Java(TM) Platform <click on> Disable.

  • Java Deployment Toolkit <click on> Disable.


Mac OS X

To Disable Java in Safari on Mac OS X

1. Access the Safari Preferences via the menu at the top right of your screen.

2. In the Security section of the preferences window, uncheck Enable Java.

To disable Java in Firefox on Mac OS X

1. Access the Firefox Preferences via the menu at the top right of your screen.

2. In the Content section of the preferences window, uncheck Enable Java.

To Disable Java in Google Chrome on Mac OS X

  1. In the address bar at the top of your web browser, type in chrome://plugins/ 
  2. Scroll down to Java and click disable.

Many screenshots and steps provided by WK_of_Angmar on Reddit.