Re: HOW TO FIX java.lang.NullPointerException ERROR FOR FIREFOX 18.0.2
Maybe you could try another:
At the top of the Firefox window click Firefox->Add-ons->Plugins.
Select the Java(TM) Platform plugin and make sure tha it is enabled. Check if it is correctly detected. For example, if Java 7 Update 11 is currently installed, the Java plugin in the Add-ons Manager tab should be listed as Java(TM) Platform SE 7 U11. If you find Java plugin files listed that do not match your current Java version, you may have outdated Java plugin files in the Firefox plugins folder which should be removed. The Firefox plugins folder, if it exists, is typically in the following location:
C:\Program Files\Mozilla Firefox\plugins on 32-bit Windows, C:\Program Files (x86)\Mozilla Firefox\plugins on 64-bit Windows