Hey, The feature was removed in Firefox 97.0. You can have a look at the below discussion page for detailed info on this. https://support.mozilla.org/en-US/questions/1367355

I just installed Firefox version 97.0. After the install, my print preview disappeared!

Preview and Page Setup are integrated into a combined overlay, and you call that up using Print. Do you get that when you call up Print?

The right side has an expandable "More settings" panel. All of the controls that used to appear above the preview image should now appear on the right. Is there anything you can't find?

This is what is shown after I click on more settings. Where is the print preview button?

There is no Print Preview button. The preview is the combination of the preview image to the left of that panel, plus the settings on that panel. Is the image missing on yours?

Thank you for your reply Jscher2000. Yes, the image is there. And I found the place where one can change the format from Original to Simplified, an important feature for me. So, I would consider the problem solved.

That said, I think the changes made to the print function by Mozilla are a solution in search of a problem. They took a feature that was simple to use and complicated it with no apparent benefit to the user.