Windows 10 已于2025年10月14日停止支持。如果您正在使用 Windows 10，参见 这篇文章。

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Firefox attached pdf files

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jscher2000 -... 已回复
surveyor2
surveyor2

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

所有回复 (1)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer

Hi Dean, this is easy to set in Firefox: View and edit 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?