How To

Change Firefox's PDF Reader Plugin

Firefox's default PDF Viewer plugin does not support all PDF formats and often cannot display digital fillable forms.

If you'd rather not use PDF Viewer, you can use a PDF reader plugin like Adobe Reader or Nitro PDF Reader or Sumatra PDF.

To change from using the built-in PDF viewer to your PDF reader plugin:

  1. At the top of the Firefox window, click on the Firefox button and then select Options
  2. Select the Applications panel.
  3. Find Portable Document Format (PDF) in the list and click on it to select it.
  4. Click on the drop-down arrow in the Action column for the above entry and select Use PDF reader name (in Firefox).