Considering a pdf file that includes a script to be printed silently:
this.print({bUI: false,bSilent: true})

The pdf file is opened from an html page. The document will not print and I don't get any error message :
<object id="pdf" type="application/pdf" data="URL to my pdf file" style="position: absolute;" width="1" height="1"></object>

Please note that it works if the pdf file is already stored on my machine.

It was working with version 19.010.20099 and it stopped working since version 19.012.20034. I tried other versions including the latest one but the problem still exists.

Excpected result: The pdf file is printed (sent to the printer)
Observed : The pdf file is not printed (not sent to the printer)

OS: Windows 10
Adobe Acrobat Reader DC: 19.010.20099
Browser: Firefox 52.0 ESR (Please not that the browser cannot be upgraded)

The problem concern all the users