Custom Header/Footer options no longer in print settings.
There used to be header and footer settings in the older page setup option for date/time, page of page, etc.
Now you have to change where you want this in the about:config. Would be nice if this option was in the print settings dialogue.
This is more of a request than an issue. As I was able to change how I wanted the pages to print using the about:config method and setting up the header and footer there.