To effectively disable Java:
- In Firefox, select "Tools" from the main menu, then "Add-ons," then click the "Disable" button next to any Java plug-ins.
- In Safari, click "Safari" in the main menu bar, then "Preferences," then select the "Security" tab and uncheck the button next to "Enable Java."
- In Chrome, type or copy "Chrome://Plugins" into your browser's address bar, then click the "Disable" button below any Java plug-ins.
- In Internet Explorer, follow these instructions for disabling Java in all browsers via the Control Panel. There is no way to completely disable Java specifically in IE.
instructions via Slate