I had a complaint from a user that a Java applet they used to run quite happily in Firefox was no longer working.
Looking at their Firefox (v 24) setup, it was complaining about a plugin named "Java Deployment Toolkit 126.96.36.199" being vulnerable, and it had disabled it. Fine, but there was no sign of the JRE plugin. This was odd in two respects; not only was the JRE installed, it was Java 7 Update 45, a much newer version.
So, about:plugins told me that the Toolkit was located at
I quit Firefox, deleted the DLL and then restarted Firefox.
So, now Firefox complains that "Java Deployment Toolkit 7.0.450.18" is known to be vulnerable, and it has been disabled, but at least the "Java(TM) Platform SE 7 U 45" plugin is listed, and the Java applet will run.
For those who are interested, the new version of the Toolkit plugin is located at
c:\Program Files (x86)\Java\jre7\bin\dtplugin\npDeployJav
From this, I can only conclude that if Firefox detects the old Toolkit plugin, it doesn't find the newer Java installation. I'm wondering how many of the computers in our managed environment have the old version of the Toolkit plugin left behind to cause problems...