Changing the Default PDF Reader in Firefox

How to make Adobe Reader as your default pdf reader in firefox

In recent updates to the Firefox browser, Mozilla has released a built-in PDF viewer which is automatically installed in Firefox. The viewer generally works the same as Adobe Reader, but has caused some changes. Some PDF documents which formerly printed in a landscape format now automatically print in portrait format, and URLs are automatically printed on the PDF document. Below we offer instructions on how to change Firefox to open PDFs in Adobe Reader or a different browser plugin to prevent these changes.

1. The PDF settings are found in Firefox’s Options/Preferences menu. For Windows, this is in the orange Firefox menu at the top left of the window; click on the Firefox button and select Options from the menu. For Macs, click on the Firefox menu (located next to the File menu) and select Preferences from the drop-down menu.

2. In the window that opens, click on the Applications tab. You can find PDF settings by scrolling through the (alphabetical) list until you reach Portable Document Format, or you can search at the top of the window.

3. Once you’ve selected the Portable Document Format (PDF) from the list, click on the drop-down menu under the Action column. Here you can select the viewer you wish to use.

* Preview in Firefox will use the built-in Firefox PDF reader.
* Use Adobe Reader/Acrobat will open the document in Adobe Reader or Acrobat (as selected) rather than in your browser.
* Use Adobe Acrobat (in Firefox) will open the document using Adobe’s browser plugin rather than in a separate program.

4. After selecting your preferred method, click OK at the bottom of the window and your changes will save. You can change this setting at any time following these instructions.