I have the same problem but told COMODO to deny. Now all access via Firefox is denied. It appears that firefox is allowed but unless I shut down the firewall I am stuck with IE. Can you tell me how to fix?
If you "Denied" without "Remember", no rule was created. Simply reboot the computer and all temporary rules will be gone. In this scenario, you would not find any Application Monitor rules indicating a block, but there will be an Application block in the Logs.
Hope that helps,
LM