Firefox & Proxy & Kerberos

[Martin Hochreiter]

Hi!

I just want to ask if somebody got firefox working with kerberos proxy 
authentication?

We use IronPort Proxies in our company that authenticate against the 
Active Directory, so
every windows machine can logon to the proxy without credentials with 
firefox, but I dont get
firefox authenticating on ubuntu 11.04 with to the proxy with a valid 
kerberos ticket ...

Can somebody give me a hint please?

regards
Martin