Comment 4 for bug 318301

Try flushing the iptables settings (iptables is the real firewall, firehol only helps configuring it):
sudo iptables -F

Do you use any other firewall config tool like Firestarter, etc?

Did you install webcontentcontrol on your PC or your laptop?
And could you vnc from your laptop into your PC while webcontentcontrol was installed?

Anyway, I made a new release which should fix the removal problem you initially had:
https://launchpad.net/webcontentcontrol/+announcement/1820

Since the previous package didn't back up the config during install, it couldn't restore it. So this might be a cause of problems if you had configured firehol, tinyproxy and/or dansguardian before installation to allow vnc to work.