Depends on HOW the input fields are presented for login. Are you
getting presented with a web page where you enter your login credentials
or do you get a separate NT auth popup window that the *server*
presented?
NTLM and Kerebos present their own login dialogs. Those dialogs are
presented by the server when you attempt to access a restricted
resource. They aren't part of the web page. It's very possible with
HTML/CSS to create a pseudo popup (looks like a popup but it's within
the web page). For your login dialog, can you drag it outside the
boundaries of your web browser?
http://sivel.net/2007/05/firefox-ntlm-sso/
In my current config of FF 16 (just started using it), that setting has
a value of null (it's not been set yet). That article is 5 years old so
it's possible Mozilla made a change in behavior and now caches those
non-web page login fields. When I search the config on "kerebos", I
don't see any.
As a test, I had password caching disabled in FF 16 so I enabled it (and
exited FF). I went to
http://192.168.1.1 to connect to my router's web
server and got the separate (non-web page) dialog popup for login. I
entered the login credentials. FF then popped up its prompt asking me
if I wanted to save the password. I said yes. I then exited FF and
reloaded it to the 192.168.1.1 IP address again. If FF had cached the
password and could use it with the separate (non-web page) login prompt
then I should not have to enter my login. Nope, I had to enter the
login credentials again. So despite having password caching enabled in
FF and despite the bogus prompt by FF making me think it will save my
password, it did not.
I'm talking about what happens to the login caching between *separate*
sessions of FF, not within the same session. If I enter my login
credentials in the separate (non-web page) login dialog, I get into my
router's config screens. I can then wander around to different sites
and when I return to
http://192.168.1.1 there's no need to reenter the
login credentials. It's when I *exit* FF and then reload it that I'll
have to reenter those login credentials because I'll still get that
separate (non-web page) login prompt despite password caching is enabled
in FF and despite FF making me thing with its "Remember" prompt that it
will save it (to reuse it). Maybe it did save that password in its
cache but it doesn't seem to manage to input it into the separate (non-
web page) login dialog.