Why the difference between the Extension list and the Plug-in list
On my Extension list I can see -
Java Console 6.0.22 Enable Java Console 6.0.23 Enable Java Console 6.0.24 Enable Java Console 6.0.25 Disable
The old versions have been disabled.
On the Plug-in list I can see -
Java Deplyment Toolkit 6.0.250.6 Java Platform SE 6 U25
If I check via the Control Panel I appear to have only
Java 6 Update 25 installed.
Why the discrepancy?
Why do I still see references to older versions, and presumably not on the computer any more, shown on the Extensions list?
ప్రత్యుత్తరాలన్నీ (3)
Java doesn't cleanup after itself when it updates to a new version. I get around the "accumulation" of Java Console extensions by not doing an update; I uninstall the older version and install the new version when a new version becomes available.
That link was most helpful. Opening FireFox as an Admin, something I had never thought of, allowed me to remove the dead wood from the 'Extensions' display.
Previously, the only way I could be certain exactly what was actually available was by visiting Control Panel ... Programs and Features
Thanks to both of you for your interest.