Try: System>Administration>Printing to bring up a Printing - localhost window
with an icon for your printer, and double-click on the icon, and then choose
Policies where you need to set Starting Banner and Ending Banner to None.

already checked there and they were set to None. That seems to be
for software pre-set header and footer text. I'm still lookin' around for that
hidden switch somewhere. I'm wanting to remember that it was my older Canon
printer where I had the stuff turned off. It may also be just a Firefox thing. I
may just have to live with this one...
Konrad - still looking.

Try configuring Firefox - about:config in the firefox URL

Preference Names:

print.print_footerleft
print.print_footerright
print.print_headerleft
print.print_headerright

When the print window comes up, the one with the list of printers and the Print
button to actually do the job, there's a line of tabs at the top I was missing.
(Da!) One of those tabs is "Options" and that's where you can tweak the headers
and footers. Set all to "none" and it sticks for all print jobs until changed
again. Life is good.

Inquiring minds...

Why were you missing the tabs and how did you fix it?

The tabs wern't actually "missing", I just did not notice them when I looked at
the window. Slowed down, looked around and there they were. My error.