Firefox ignores default printer settings
I have a new printer, Brother HL-L2350DW that has worked fine for a few weeks.
Firefox recently made some changes and now the printer will not print duplex. Unless I go in EACH and EVERY time to the Firefox print dialog Preferences and change to double sided, it will not print duplex.
In the Windows Printer preferences for the printer, it shows Duplex printing and will print as such everywhere else but Firefox.
I print a lot of receipts and I bought the printer specifically to avoid paper waste.
I did clear the printer using the config:printer.... instructions.