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.

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.

Firefox attached pdf files

surveyor2
surveyor2
more options

HP zBook 64 bit with Windows 10 running Firefox 91.3.0 (32 bit)

Hello looooooonnnng time user here. Since the last update, Firefox is now opening Adobe pdf files internally in another tab -- not in the external application. Our firm makes use of some fairly complex pdf's and they are not displaying correctly within Firefox. I would like to return to the previous behavior where attached pdf files are opened in Adobe Acrobat DC.

Thanks, Dean Scott

HP zBook 64 bit with Windows 10 running Firefox 91.3.0 (32 bit) Hello looooooonnnng time user here. Since the last update, Firefox is now opening Adobe pdf files internally in another tab -- not in the external application. Our firm makes use of some fairly complex pdf's and they are not displaying correctly within Firefox. I would like to return to the previous behavior where attached pdf files are opened in Adobe Acrobat DC. Thanks, Dean Scott

All Replies (1)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 25 Contributor
more options

Hi Dean, this is easy to set in Firefox: View PDF files using Firefox’s built-in viewer.

However, you posted under the Thunderbird category, and I'm not sure whether there is a setting in Thunderbird for where to send PDF attachments. Would that normally be controlled by the Windows "default app" setting?