If you prefer an offline installation, go to the Java Downloads page (see above for links) and save the Windows Offline installer to any convenient location, close your browser and run the installer.
 Starting with Java 6 Update 10, Java updates patch the current version by default instead of adding an additional version.
See 64 bit builds for more information about 64-bit versions of Mozilla applications.
   For Linux installation instructions, see How do I download and install 32-bit Java for Linux Platforms?
or What are the Linux 64-bit installation instructions for Java?
Mozilla applications are regularly updated for security and stability; however, Mozilla does not provide updates for plug-ins.
Plug-ins can cause crashes and hangs and may contain security vulnerabilities.
After enabling Java, test Java again: The Java Deployment Toolkit plugin, which is installed along with Java, does NOT need to be enabled for Java applets to work.
If you only see the Java Deployment Toolkit plugin listed in the Add-ons Manager, then Java is not properly detected. If you don't need 64-bit Java, there is no reason to have it installed.If both 32-bit and 64-bit versions of Java are installed, the Windows Control Panel will display only the 64-bit Java Control Panel.On Windows, make sure you select the 32-bit JRE since Firefox and Sea Monkey official releases are 32-bit (e.g., select "Windows x86 Offline" for the offline installer linked from Oracle's Java SE Downloads page).See below for more information on installing or updating Java on Windows.Information on security and stability issues affecting Java is available at Oracle's Critical Patch Updates and Security Alerts page.