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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Pdfs only open in tab in browser window after update, no matter what the settings say to use

  • 5 majibu
  • 2 wana tatizo hili
  • 7 views
  • Last reply by Terry

blfreeze
blfreeze
more options

I was just upgraded to Firefox 91.0. Immediately, pdfs only open in browser tab window after update, no matter what my settings say to use. I have tried "Save File", "Always ask", "Use Windows default app", and my usual choice "Use Adobe Acrobat". Makes no difference. The pdf always opens in a browser tab within Firefox. It was working in 90.0.2, which was the previous installed version before the 91.0 update.

Any suggestions as to how I can fix this?

I was just upgraded to Firefox 91.0. Immediately, pdfs only open in browser tab window after update, no matter what my settings say to use. I have tried "Save File", "Always ask", "Use Windows default app", and my usual choice "Use Adobe Acrobat". Makes no difference. The pdf always opens in a browser tab within Firefox. It was working in 90.0.2, which was the previous installed version before the 91.0 update. Any suggestions as to how I can fix this?

All Replies (5)

Terry
Terry
more options

It may be a bug as someone else has reported the issue. https://support.mozilla.org/en-US/questions/1346985

Terry
Terry
more options

It is happening in my Linux version also.

Terry
Terry
more options

There is a bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1725921

blfreeze
blfreeze Mwenye swali
more options

Additional information: The pdfs appear to open as they did prior to the Firefox 91 update (i.e., in my Adobe Acrobat) if the file is located online (http://). Unfortunately, I have to open the files locally for testing purposes before the pdfs go on the internet, and those local pdfs are the ones that Firefox 91 is opening in a new tab within Firefox instead of opening in Adobe Acrobat.

I found a solution that helped with this issue here: https://support.mozilla.org/en-US/questions/1347907

I am not crazy about having to update about:config to resolve this, but I am happy that there appears to be a hack until the problem is fixed.

Terry
Terry
more options

Thanks. I doubt that your post will help here but your comments may help on the bug report. So, there was a stupid 'fix' on Firefox 91.