While I can access primary and sub accounts with ie8, there are issues with email and firefox v3.6.3.
Using firefox, it is impossible to access any email accounts other than the account assigned to me for use with the "my webspace" feature. A feature I have used for several years btw. That address although, is not one that I have ever used for Email.
If there is no fix.... I'll start the calling procedure with Verizon tech support.
Thanks!
Doug k