User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/18.0 Firefox/18.0
Build ID: 20120828030555
Steps to reproduce:
Without Java installed, go to "Add-ons Manager > Plugins > check to see if your plugins are up to date"
Plugin check opens, and the first, most prominent message is:
For your safety, Firefox has disabled your outdated version of Java. Please upgrade to the latest version.
The message should not be displayed. Similarly, if on a PC java _is_ installed but the plugin is manually disabled, the message should also not show (yet it does).
*** This bug has been marked as a duplicate of bug 753219 ***