Hi Peter,
I went through the post and tried all possible solutions but not able to login to Web Client manually.
I followed the steps you provided and then restarted Virgo server and even rebooted vcenter.
Issue: The screen blacks out as soon as I login to the web client. "Unresponsive Plugin" error and then crash.
Environment: I am working on 6.0 U1 vCenter and FireFox
Please find UI.swf and pom.xml files attached.
Thanks,
Ashesh