For security reasons you may want to disable Java in all web browsers or certain web browsers on your computer. See our instructions for how to disable Java as needed.
- Go to the Windows Start Button and select Control Panel.
- Click Java in the Control Panel list to open the Java Control Panel.
- Click the Security tab. At the top of the Security tab window, uncheck the box Enable Java content in the browser then at the bottom of the window click Apply. Close the Java Control Panel. With this action, Java is disabled in all your web browsers but the Java application is still installed on the computer. To remove Java from the computer, follow the steps above for uninstalling Java.
To disable Java for all web browsers on your computer:
OS X 10.6 Snow Leopard or lower
- Macs with OS X 10. 6.x or lower will no longer run Java. No action is needed to disable Java for computers with these operating systems.
OS X 10.7 Lion or 10.8 Mountain Lion
- Go to System Preferences then click Java to open the Java Control Panel.
- Select the Security tab and uncheck the box Enable Java content in the browser. With this action, Java is disabled in all your web browsers but the Java application is still installed on the computer. To remove Java from the computer, follow the steps above for uninstalling Java.
Specific browsers Windows & Macintosh
- Apple has disabled Java for the Safari browser except for Java 7 update 13 or higher for OS X 10.7 Lion and OS X 10.8 Mountain Lion.
- By default, the Mozilla Firefox and Google Chrome web browsers will disable Java. When you encounter web sites or applications that require Java, a message window will give you the option to allow Java to run or not. It is fine to allow Java to run for trusted Amherst and Five College applications but you may wish to not allow Java to run for unknown applications.
- To check if your version of Java is current for the most current version of Mozilla Firefox, in the Firefox menu go to Tools > Add-ons then click the link at the top of the page Check to see if your plugins are up to date. See if Java is in the list. It will be marked as needing an update and as disabled if it is out of date. To update Java see instructions above.
Internet Explorer (version 9.x or 10.x)
- Click the gear icon in the upper-right corner and choose Manage Add-Ons. Scroll down to the Oracle America, Inc. heading.
- For each entry labeled in some form with "Java(tm) Plug-In SSV ..." click to select and then in the lower-right corner of the screen click the Disable button.
- Restart Internet Explorer to complete the process.
- When Internet Explorer restarts, at the bottom of the screen a notice may appear that says, "The 'Java(tm) Plug-In SSV Helper' add-on from 'Oracle America, Inc.' is ready to use." Click Don't Enable. If you get a second notice about a Java add-on, click Don't Enable again.
Firefox (current version 18.x)
- In the Firefox menu click Tools then Add-ons.
- Find Java(TM) Platform SE 7 U11 in the list and click once on it then click Disable.
- You may find Java has already been disabled in which case no action is needed. If you make any changes, restart Firefox to complete the process.
- After this, if you encounter a website or web application that requires Java to work, Firefox will ask you if you want to allow Java for that website. You can then opt to allow it for trusted sites and not allow it for unknown or untrusted sites.
- Mozilla has published information about how to work with Java and Firefox (external link to mozilla.org website)
Chrome (current version 24)
chrome://pluginsin the address bar and hit the Enter key on the keyboard.
- You should see an entry that says something similar to "Java (2 files) - Version: 10.7.#.##" Click on that entry and click the link Disable.
- Restart Chrome to complete the process.
- After this, if you encounter a website or web application that requires Java to work, Chrome will ask you if you want to allow Java for that website. You can then opt to allow it for trusted sites and not allow it for unknown or untrusted sites.
Safari (all versions)
- Apple has disabled Java for Safari by default except for Java 7 update 13 or higher for OS X 10.7 Lion and OS X 10.8 Mountain Lion. If Java is not disabled, to do so click Safari in the main menu bar, then Preferences then select the "Security" tab and uncheck the button next to "Enable Java."
DO NOT update, disable or uninstall Java on any classroom, computer center or lab computers. IT manages the versions of Java and web browsers installed on these computers. The computers are monitored for malware and IT will handle any malware issues that occur.