You will need two profiles: I use my default for my corporate setup, and a new one for development.

(Note:  if you want to keep open a browser, you can use the –no-remote switch so that Firefox doesn’t ignore your pleas to use a different profile, and instead just makes another window that uses the same one.)

firefox -P kfrog  –no-remote &

Go through the steps to create another profile.

In the second window, you need to establish kinit, but running with a different TGT.  You do this with an environment variable:

export KRB5CCNAME=/tmp/krb5ccache

kinit kfrog@TESTREALM.COM

Close and restart firefox.

firefox –no-remote -P ayoung &