User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8) Gecko/20051111 Firefox/1.5 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8) Gecko/20051111 Firefox/1.5 I visit a PDF URL. It is displayed using the Acrobat plugin inside a Firefox window. Choosing "File->Print" from the menus starts what I presume to be an Acrobat print dialog. On the other hand, "File->Print Preview" starts the regular Firefox print preview window, which doesn't know what to do with a PDF document and shows a page that is blank apart from its headers and footers. Ideally the user would be able to print-preview PDF URLs. If this is not possible, the menu entry should be removed or greyed-out. Reproducible: Always Steps to Reproduce: 1. Visit a PDF URL (e.g. http://www.copyright.gov/legislation/dmca.pdf). 2. Select "File -> Print Preview" from the menus. Actual Results: A page is displayed that is blank apart from its headers Expected Results: The PDF file, as it would be printed, should be displayed. Or it the menu item should not be selectable.

dupe of bug 248936 / bug 134002?

Yes, I think bug 134002 covers this. Marking as a dupe. Will post a followup comment there. *** This bug has been marked as a duplicate of 134002 ***

Reopening this bug, see bug 134002, comment 25: " (In reply to comment #24) > See my comment #17; in the case of PDF (and presumably other formats) printing > is handled by the plugin itself (and works), but preview isn't. So for > full-page plugins I feel that print preview should be disabled in the UI. Full-page plugins are a completely different codepath; please file another bug. "

I'm going to WONTFIX this in favor of bug 838763.