You have to provide the screenshot of the final print screen of showing what printer are available to print to.

Hi, does this affect all web pages, or only certain sites? I ask that because on some sites, their print button generates and delivers a PDF file instead of using the built-in print feature.

Within Firefox's print dialog, you will be asked to save a file if you choose a PDF printer such as "Save to PDF" or "Microsoft Print to PDF". Normally, you won't be asked to save a file if you choose a physical printer but if you use the link for the System Dialog down near the Print button, there may be a "Print to file" checkbox checked in that dialog you can uncheck.