This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Can't open .pdf's in FF4.o or in FF3.6 with plug in?

  • 2 tontu
  • 14 am na jafe-jafe bii
  • 6 views
  • i mujjee tontu mooy Flanders1

more options

When running FF3.6 on my Mac OS X 10.5.8 I figured out how to view .pdfs in the browser using a plug in. This worked fine.

Then when prompted I "upgraded" to FF4.0 and lost the .pdf view capability. Also then found out a plug in was not available for 4.0. {Perhaps upgrade is poorly used in this context.}

Saw a posting about reinstalling FF3.6 which I did no problem. However installed the .pdf plug in but still no viewing available.

Any suggestions? Otherwise I'm going to have to go back to Safari as my default browser.

When running FF3.6 on my Mac OS X 10.5.8 I figured out how to view .pdfs in the browser using a plug in. This worked fine. Then when prompted I "upgraded" to FF4.0 and lost the .pdf view capability. Also then found out a plug in was not available for 4.0. {Perhaps upgrade is poorly used in this context.} Saw a posting about reinstalling FF3.6 which I did no problem. However installed the .pdf plug in but still no viewing available. Any suggestions? Otherwise I'm going to have to go back to Safari as my default browser.

All Replies (2)

more options

Hi Flanders1:

I have the same thing in FF4.0. PDFs would 'download' instead of open. After much searching, trial and error I went to an Adobe page at: http://kb2.adobe.com/cps/328/328233.html

I did the following from that page and it worked for me:

Deselect and then reselect the Display PDF In Browser preference In Adobe Reader or Acrobat, choose Edit > Preferences. Select Internet. Deselect Display PDF In Browser, and then click OK. Then 'Select'it again- Choose Edit > Preferences > Internet, select Display PDF In Browser, and then click OK.

Make sure you close FF and relaunch and then try clicking a PDF link. If it still doesn't work, go to that Adobe help page above to try other solutions.

Good Luck!

more options

Thanks for the input. However reading through the linked page it appears like this solution is for Windows and not Mac. The described solution does not equate to Mac's OS X environment.

Thanks again though for trying.