Getting ride of headers on macosx

Hello,

in Macosx I try to cut off the headers and footer when printing.

I tried to change in user.js, prefs.js or about:config but it still not 
working. (print.print_headerleft...)

Any idea?

This is very important as we have an online system that produce 
invoices as html files, and currently we can print them only with 
Windows. (safari on macos does not render them well)

I use macosx 10.3 with mozilla 1.6, firefox 0.8, mozilla 1.7rc2, camino 
nightly (all browser I tried).

Ha, an alternate solution would be a server side converter (in java C 
or perl) that would output a pdf or ps from html as mozilla do if we do 
printToPdf on a windows machine.

Regards

goyman

PS: I know that's possible, I'm trying to hack the sources but they are 
huge and I'm a little bit lost, so if any developer can help me, I 
would be happy.