Firefox: Disable PDF viewer

Firefox has a PDF viewer with which you can view documents without any additional programs. This practical tip shows you how to deactivate the viewer.

Mozilla Firefox - switch off PDF function in the browser

If you would prefer to use other programs to view PDFs, you can simply switch off the standard setting of the internal viewer.

• Open the Firefox settings using the menu button at the top right.
• Click "Applications" and look for "PDF" in the text box.
• Now you can select in the dropdown menu how Firefox should handle PDFs. You can choose whether a different program should open PDFs or whether you will be asked each time. Alternatively, you can simply save the PDF'S without opening them.

This practical tip was created with Firefox 29.0.1. We show you how to print protected PDFs here.