Use the Adobe Reader plugin to view or download PDF files .

• https://support.mozilla.org/en-US/kb/use-adobe-reader-plugin-view-or-download-pdf-files?

Downloaded but already had that version installed an no difference to display.

Hello,

In order to change the default reader for PDF files (to not open PDF files with Firefox's internal PDF reader), follow these steps:

1. Go to Tools > Options (or Firefox > Options).
2. In the Options window, select the Applications tab.
3. In the Search field, type PDF. You should find Portable Document Format (PDF).
4. On the right handside you should find an Action column. Use that to select your favorite PDF reader. In order to view PDF files in Firefox, choose Preview in Firefox.

Did this fix your problems? Please report back to us!

Thank you.

Can you attach a screenshot?

• http://en.wikipedia.org/wiki/Screenshot
• https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem

Use a compressed image type like PNG or JPG to save the screenshot.

You can try the latest development version of the PDF Viewer (pdfjs) extension to see if that version still has this problem.

• http://mozilla.github.io/pdf.js/extensions/firefox/pdf.js.xpi

That sorted it - thanks

My version of this problem involves 2 machines both with FF v28 installed, and on both the FF options are set to the same values: in particular, application action for pdf content is set to open the content with the adobe acrobat reader X installed on each machine. On machine 1, selected pdf content on a website is downloaded and saved in the specified download folder, but not opened. On machine 2, selected pdf content on a website is downloaded, opened and displayed.

Why is this difference in performance occurring, and what can I do to machine 1 to have it perform the same way as machine 2 with the same settings?

Davidk03