Having problems printing PDF files in Firefox? Please follow these instructions to corrrect the issue:

1) Open Firefox and click on the three horizontal lines at the top, right of the browser window.

Select Options Menu

2) Choose Options in the dialog box that appears.

Choose Options

3) Scroll down to Portable Document Format (PDF) and select Use Adobe Acrobat (default)

Choose Acrobat as the default viewer

You should now be able to print PDF files.