Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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

Unexpected change in opening pdf downloads with 37.0.1

  • 3 replies
  • 6 have this problem
  • 22 views
  • Last reply by sfread

more options

This is my first time asking a questions, so I may not be doing it quite right. Anyway, after downloading the update to 37.0.1, viewing pdfs became different. I now get a separate download window (which I didn't get before) and when I go to the downloaded pdf file, I now have to answer several questions before I'm able to get the Reader to run. I believe pdfs used to just open up automatically in a new tab without having to do anything. Is there a way to restore that behavior? Thanks for your help.

This is my first time asking a questions, so I may not be doing it quite right. Anyway, after downloading the update to 37.0.1, viewing pdfs became different. I now get a separate download window (which I didn't get before) and when I go to the downloaded pdf file, I now have to answer several questions before I'm able to get the Reader to run. I believe pdfs used to just open up automatically in a new tab without having to do anything. Is there a way to restore that behavior? Thanks for your help.

Chosen solution

Please try the following and see if it works:

1. Go to the firefox preferences by typing "about:preferences" in the location bar. 2. Choose the "applications" tab on the left. 3. Type "pdf" in the search box that appears. 4. You should get something similar to the attached screenshot. Click on the dropdown menu, and choose "Preview in Firefox" as the action.

Read this answer in context 👍 2

All Replies (3)

more options

Chosen Solution

Please try the following and see if it works:

1. Go to the firefox preferences by typing "about:preferences" in the location bar. 2. Choose the "applications" tab on the left. 3. Type "pdf" in the search box that appears. 4. You should get something similar to the attached screenshot. Click on the dropdown menu, and choose "Preview in Firefox" as the action.

more options
more options

Thanks, user293. This is much better. I still get a separate window for downloads (instead of a new tab), but this is a big improvement.

I wonder why this changed after I installed the latest update...

Thanks to both of you for your quick responses.

Cheers!