[vox-tech] Installing Firefox in Kubuntu

[Bruce Wolk]

I'm a long time Gentoo user who is experimenting with Kubuntu 7.04 on an 
  old Althon-XP box.  The system installed without a glitch, but I can't 
seem to install additional software.  The add/remove facility shows 
Firefox in the list, but it is greyed out and I have found no way to 
ungrey it.  I tried using apt-get install firefox via the command line, 
but this gives a "Package firefox is not available" error.  Googling 
hasn't helped.  Any suggestions?

Bruce