Java not updating registry
See 64 bit builds for more information about 64-bit versions of Mozilla applications.
   Note: The Java Embedding Plugin has been bundled with Mac distributions of older Mozilla browsers, including Firefox 3.x and Sea Monkey 2.0.
   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?
This utility allows browsers other than Apple's Safari to use the most recent versions of Java on Mac OS X.
 The Java Embedding Plugin is no longer needed in newer Mozilla browsers such as Firefox 4 and is no longer included.
To view or change this option, click the Java icon in the Windows Control Panel or Mac OS X System Preferences to open the Java Control Panel, then select the Security tab.    Mac OS: You can download Java from Apple Support Downloads (Java 6 and below). Windows and Linux: You can download Java here or you can select the offline (full) installer for your operating system from this download page.
Depending on the version of Java and your Mozilla browser, the Java plugin may be disabled in the Firefox or Sea Monkey Add-ons Manager or the Java plugin may require Click to Play (CTP) activation.  [ Visit one of these Java test pages to see if Java is working in your browser.
In current Mozilla browsers, you'll need to activate Java.
See Manual Installation and Registration of Java Plugin for Linux at for additional information.
The Java Update feature automatically checks for updates at scheduled intervals and notifies you when an update is available so that you can install it.