Thunderbird 91 - PDFs opened in Thunderbird don't print correctly
If I click on an attached PDF it opens in the new Thunderbird viewer.
However if I attempt to print the PDF it defaults to Landscape view and splits the pages.
The print settings indicate Portrait, and the page size matches my printers (A4).
If I right click on the attachment in the email, and save the PDF to a folder on my PC, then open it from the folder, it then prints correctly.