Using gnome 2.4.In kde, all i did was add this: 'kprinter --stdin' on the firefox printer command line. What do i do in gnome if there is no kprinter? Is there a similar command? I have gnome-cups ...

Select "Microsoft Print to PDF" from the list of printer options. Note: Firefox doesn't include a built-in PDF printer, so you may need to use an extension if Microsoft Print isn't appearing.