I think your best bet is to set the default paper at the Windows level, so that when you choose that printer in Firefox, Firefox can retrieve that default setting.

If this is a printer connected to your PC by USB, rather than a printer managed by a network server, you also can create two "printers" pointed at the same device, each of which has its own settings.

The printer settings are already set at Windows level accordingly. This does not appear to transfer to what the browser uses. The browser seems to only use one setting. Selecting a different printer does not change the paper type or settings. So if the laser print was printed to, you have to make sure that correct paper type is selected. If I then need to print a receipt, when selecting the receipt printer I have to change it back to receipt paper.

If Firefox is not reading the settings from Windows, try clearing the stored preferences for that printer. This involves a lot of right-clicking, but hopefully then you will get the settings imported correctly.

The reset procedure is described in the following article. I think the settings you want to focus on can be selected by filtering on print_paper in the Search box once you've opened the about:config preferences pane.

Problems printing web pages - MozillaZine Knowledge Base > Reset Printer

I've have done that before. It didn't seem to fix this particular issue. But looking around in the about:config is where I noticed each individual printer listed, with preference options available for each. I searched the web briefly and couldn't find any useful information regarding how to configure each of these options.

I noticed an option for paper type and hoped that each printer could be configured accordingly. Do you know if this is possible?