Mozilla Firefox is an open-source web browser developed by Mozilla. Firefox is available for Windows, macOS, Linux, and Android. Firefox has been the second most popular web browser since January, 2018. Firefox uses the Gecko rendering engine. Download Firefox
A warning comes up on the screen and you click on the warning to be careful, then it shows all processes. Just scroll down to the print.print_printer and Right click on it. A drop down box appears and you can then click on Reset. Then close Firefox by clicking on X (top right of screen) and open Firefox again and see if it has cured the problem.