Issue: Users that we support, who are using firefox, are randomly unable to print. There is no discernible pattern as to when the issue is encountered and it persists until a tech goes into the browser, about:config, and toggles the print.print_via_parent setting. We have tried preemptively toggling the setting from True to False, but it doesn't prevent the error and we just end up toggling it again later, like flipping a breaker when it blows. We can resolve the symptom, but I'm hoping someone can help us ID the root so we can fix the problem for good. Specs: The computers being affected are Dell E7470s running Windows 10 (64-bit). There aren't many users with specialized programs that might affect printing, and most users are not tech savvy enough to install browser add-ons. What we've tried: * Toggling the print.print_via_parent setting is the only successful thing we've tried so far but this doesn't really resolve the issue because it will resurface later. * all the steps here- https://support.mozilla.org/en-US/kb/fix-printing-problems-firefox * and all the steps here- http://kb.mozillazine.org/Problems_printing_web_pages Does anyone have ideas as to what the root issue might be and how we can fully resolve it? Thanks.