Hi Andrew

This does not sound like an issue with Firefox but is something that you may be able to change in the Windows printer settings.

No, all other programs let you select the paper tray. Firefox doesn't have that option but it just changed on me recently. I just don't know how it sets it's default printer paper tray. It's not my actual windows default.

Show the print options from a windows print test showing the tray options. Then also post a screenshot showing the print options you see in Firefox with the print preview showing the print tray options.

The problem seems to be that Firefox just doesn't use the default paper tray. AS you can see when I ask for the printer dialog in another application it has the default oi rear paper tray. When I print that's where it goes. When I try to print from Firefox and use the printer driver option (as there is no option for tray in the standard settings) I see exactly the same screen with the same default to rear paper tray. But when I actually print, it goes to cassette 2 not the rear paper tray. It just ignores that setting.