webinterface with firefox 3

[franz.pfoertsch.brose]

Hello,

I am trying to use firefox3 to administrate cups.

So I typed in https://<server>:631  allowed firfox to accept the
selfsigned certificate, clicked throu the different panels,

modify printer -> location/description -> device -> device uri ->
choose the mark

after this the interface stopps working.

I changed the logleve to debug, but there is nothing strange.

Is firefox3 broken, or it there something missconfigured?

regards and thanks for help

Franz