Java Deployment Toolkit (click-to-play) has been blocked for your protection.

Why was it blocked?
The Java Deployment Toolkit plugin is known to be insecure and is unnecessary in most cases. Users should keep it disabled unless strictly necessary.
Who is affected?
All Firefox users who have this plugin installed.
What does this mean?

The problematic add-on or plugin will be automatically disabled and no longer usable.

When Mozilla becomes aware of add-ons, plugins, or other third-party software that seriously compromises Firefox security, stability, or performance and meets certain criteria, the software may be blocked from general use. For more information, please read this support article.