Unable to preview PDF in Firefox

Creation date: 1/22/2022 4:25 PM    Updated: 3/27/2025 12:11 PM   browser firefox mozilla firefox outlook pdf preview pdf
Follow the steps below to enable PDF preview in Firefox.

See steps:
  1. Go to your browser and click on the Menu -> "Settings" button.
  2. Go to "Options".
  3. In the "General" tab, scroll down till you see "Applications".
  4. When you see your PDF tool there (either Adobe or Nuance, or similar), click on the drop-down arrow on the right-hand side of it, and select "Preview in Firefox".
  5. Then close the browser down, and re-open it.
  6. Then, try previewing a PDF in your Outlook web app and see if it works. For me, this fixed my problem.
  7. If it still doesn't work, try going into your Outlook and looking through your settings there as well.