In the expanded print dialog window there's a popup mid right that lets you change print options by group. Layout, Color Matching, paper type, etc. You probably have that set to one of the other values such as Summary. The first option in the list is application-specific. Selecting Safari gives options for Print Backgrounds and Print Headers and Footers. Those sound like what you were looking for. Other applications will present other options when their option group is selected.
I'm fairly sure that popup defaults to whatever you last set it to view. Or is "Safari" not the top option in the popup?
