Windows 10: Default PDF Viewer changed to Edge or Acrobat after each PDF download

I'm using SumatraPDF to view PDF files.Whenever I open or save a PDF file in Firefox, the Default PDF viewer is changed from SumatraPDF to Edge.If Acrobat Reader is installed and set as the default viewer, the setting doesn't change after each download.This appears to be a security feature to encourage PDF viewing in Microsoft-approved viewers that might prevent exploits.I've tried setting SumatraPDF as the default via:-click Start Settings Apps Default Apps-click Choose default applications by file type-Select .pdf-Choose SumatraPDFThe window closes as though it has crashed no error is

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Windows 10 Edge PDF Viewer

Hi,

Welcome to Microsoft Community.

I suggest you to follow the below steps and check if it helps.

1. Click on start menu and select settings.

2. Click on System.

3. Click on Default apps.

4. Towards the bottom of the page
'Choose default application by fire type'.

5. Scroll down to .pdf

When you get to pdf, you will only see Adobe Acrobat Reader on the list.

You'll need to left click at Adobe Acrobat Reader > then choose Microsoft Edge.

That will change Edge as the default app to open pdf files.



Hope this helps.

Regards,

Guru Kiran

 

Microsoft Edge Overrides Default Program for PDF

Hi,I've checked the Event Viewer and found nothing related. Unfortunately I don't know how to use that tool either. I change the default program to open PDF files to Adobe Acrobat and the icon of the PDF file change into the Acrobat icon and the file is
opened in Acrobat. The situations when Edge overrides as default program for PDF I've encountered are :

1.simply by right click and refresh and the PDF file icon turns into Edge icon;

2.sometimes it will keep Acrobat as the default program to open PDF files, but when reopen a PDF file, and it does launch using Acrobat, but the default program has been changed(the icon changes into Edge immediately). And another weird thing is, sometimes
Acrobat will popup a window and saying if use it as the default program and by choosing yes, it's changed into Edge. : (.

It's kind of annoying...I'd rather uninstall Edge if possible.

 

change default PDF viewer in MS Edge for PDFs opened by portals

Have you set your default PDF reader to Nuance Power PDF Advanced?

Settings>Apps>Default Apps>Choose default apps by file type>scroll down to .pdf on the left side of your screen, then click on the default app (most likely Edge). A list of available PDF reading apps should show up . . . click on your Nuance PDF reader and select it as your default. As you can see, I use Adobe Reader. *Smile