You could see the processes and the ports and kill the application directly from TcpView (http://technet.microsoft.com/en-us/sysinternals/bb897437.aspx). Probably is not exactly what you want but you will be able to identify and kill the process in fewer steps.
I have just switched to Chrome. Thunderbird also seems to follow the same trend: yesterday just got to version 7 but there is nothing changed which justifies the major digit incrementation.