If no one here has any other ideas, you can also consider filing a new bug on bugzilla.mozilla.org or ask over in discussions.apple.com where there are other Mac users with the latest Java and Firefox, who may be able to help.
If no one here has any other ideas, you can also consider filing a new bug on bugzilla.mozilla.org or ask over in discussions.apple.com where there are other Mac users with the latest Java and Firefox, who may be able to help.