I no longer have a preview image in the print pane when I print from Firefox on my Mac running OSX 10.7.5. Safari has it. Chrome has it. Every other program has it. Just not Firefox. I have checked for an HP extension according to one suggestion, and I have none. I have disabled all superfluous extensions and add-ons. I have reset the print, and reset all print preferences according to Firefox help instructions. No difference whatsoever. Is it time to switch to Safari or Chrome?
No, in exactly the same spot is a "Hide Details" button, and it does not matter which printer is selected. There is no "Preview" button anywhere. When I click "Hide Details", the dialog box shrinks down to show the minimum info, not a preview. Aside from that on e button difference, all the other information on my dialog is identical to the one you provided.