When running firefox which allows for my kerberos keys to automatically log in, I'm unable to use any other accounts. If I log out, I am just given a button to log in again. I need to be able to log in as a different user for testing and as my administrator account which is not the account I use on the box.

As a note, this is how the IPA gui works. I can type any username I want to log in, or if I leave it blank, it uses the kerberos keys.