You might be able to set that thru your Printer Preferences, so look there from within Firefox first. {Ctrl + P} then hit the Properties button, on the Paper Tab you should be able to set the Paper Size.

If not, give this a try:

type about:config in the URL bar and hit Enter Pref Name = print.printer_your_printer_name.print_paper_height - 11.00 and print.printer_your_printer_name.print_paper_width - 8.50

Is that what you see? If you see those "Letter" measurements, try re-setting the main pref, and let Firefox reacquire the info from your OS.

in about:config Preference name = print.print_printer Right-Click and select Reset, then restart Firefox.

Thank you for the reply. I understand the workarounds you mentioned. I guess the answer to my question is no then - No you cannot select paper size prior to selecting print preview.

The only options to select paper size prior to actually sending job to printer is:

- change about:config

If I open File > Print Preview the only options for Page Setup are margins, etc... no Paper Size option.

Similar to IE... Page Preview gives you Page Setup options that include changing Page/Paper Size