can I define a default printer in firefox? how?

[Paul E Condon <pecondon@mesanetworks.net>]

I'm running cups under sarge. I can print from firefox, but
the print window shows five printers, two are attached to a
Mac in the next room, two are figments of firefox's imagination.
The firefox print window always comes up with one of the figments
preselected (its designation is "xp_ps_spooldir_HOME_Xprintjobs@:64" )
If I forget to select a proper printer, I don't get output until
I fix my mistake. I hope there is a way to select a useful default
printer which will be automatically pre-selected when a choose to
print a page. Does anyone know if I can do this? And how?

TIA
-- 
Paul E Condon           
pecondon@mesanetworks.net