Tried to update to new Java..
Java(TM) Platform SE 7 U51Next Generation Java Plug-in 10.51.2 for Mozilla browsers, I've updated it three times and restarted firefox after each time and the Plugin Check and Updates still saying it's vulnerable.
Wšykne wótegrona (1)
Don't worry it is a problem with the Firefox Mozilla updater and is under investigation. I will copy another answer given by Alice
You don't need to do anything since Java 7 Update 51 is not vulnerable (afaik) and is the recommended version offered at http://www.java.com/en/download/manual.jsp and http://www.java.com/en/download/
If you check the "Do I have Java?" link at http://www.java.com/en/download/ and run the Java Detection applet it will tell you that you have the recommended Java installed (Version 7 Update 51).
Related bugs:
- Bug 985968 - Mozilla Plugin check page displays Java plugin as vulnerable even if the latest version is installed.
- Bug 985056 - Java JDK 8 released
P.S. The bug reports are for information only. Don't comment in bug reports unless you have something constructive to add (see Bugzilla Etiquette).