With recent Java versions, you'll also need to confirm that you want to run Java, if prompted. In current Mozilla browsers, you'll need to activate Java. Visit one of these Java test pages to see if Java is working in your browser. 6.7.3 Mozilla PluginCheck webpage identifies the latest Java 7 plugin as vulnerable.6.7.2 Plugin Check reports outdated Java has been disabled when it is up-to-date or when Java is not installed.6.5 Java applet causes backwards or jumbled typing in text boxes.6.4 Java applet causes browser process to remain in memory after exiting the browser.6.1 Java content requires click-to-play activation.5.3.3.4 Remove outdated Java files from the browser plugins folder.5.3.3.1 Use Internet Explorer to install Java.3 If Java is installed and enabled but does not work.2.3 Enabling and disabling Java from the Java Control Panel.2.1 If the Java plugin does not appear in the Add-ons Manager even though Java is installed.Depending on the version of Java and your Mozilla browser, the Java plugin may be disabled in the Firefox or SeaMonkey Add-ons Manager or the Java plugin may require Click to Play (CTP) activation. Important: Mozilla adds outdated or insecure plugins to its Add-ons Blocklist as a security measure. Starting in Firefox 3.6, Java will not work unless you are using the Next-Generation Java Plug-In (included in Java 6 Update 10 and above). See JavaScript is not Java for more information. Note that Java is not the same as JavaScript. To run these Java applets, you need the 'Java Runtime Environment' ('JRE') installed and enabled. Many web pages use Java applets for interactive content such as online games.

Java is a programming language originally developed by Sun Microsystems (now Oracle). Information on security and stability issues affecting Java is available at Oracle's Critical Patch Updates and Security Alerts page. Plug-ins can cause crashes and hangs and may contain security vulnerabilities. Mozilla applications are regularly updated for security and stability however, Mozilla does not provide updates for plug-ins.

Java for mac os x version 10.6