When using Microsoft Edge in Windows 10 (v1803), if I click on a Web link to a PDF file, like this one, Edge opens the PDF in a tab using its internal PDF viewer.
How do I configure Edge to open the PDF in my default external PDF viewer instead (e.g. Sumatra PDF or Acrobat Reader)?
I stress that I am not asking how to set my PDF viewer (Sumatra PDF) as the default PDF viewer! (This was discussed e.g. here)
In fact, Sumatra PDF is already the default PDF viewer in Windows 10, and PDF files properly open with Sumatra PDF when I click on a file in Files Explorer. However, the files still open in a tab of Edge when I click on a web link to a PDF (like the above one) file within Edge.
To further clarify, what I am looking for is something equivalent to the Google Chrome Setting "Download PDF files instead of automatically opening them in Chrome." This was addressed in this question and I am looking for the equivalent with Edge.
I suggest testing your answer with this PDF link, to make sure the PDF does not open in Edge, before posting.
FYI, this same question was asked in the Microsoft Community here, but it was misinterpreted and has no useful answer. Moreover, that site is dominated by noise. So I am hoping the more reliable Superuser community will have a better and more up-to-date answer.