auto-launching a PDF

When Netsurf fetches a PDF file, would it be possible to trigger the
PDF-reading application automatically, rather than requiring the user
to save the file to disc and then launch it manually?

(The manual procedure is too complex to explain to a technophobe Other
Half.)

What prompts me to ask is that I came across the following text inside
!PDFtest.Docs.Hints, which is dated 1998-03-24, apparently by Leo
Smiers (who ported the PDF reader from XPDF on Linux; Colin Granville
carried on the work):

=====
Hints dd 980309
=====

Starting !PDF from !Fresco version 1.32

It's possible to make Fresco start !PDF when it downloads
a PDF file. To do this, you must add lines to the
!InetSuite.Internet.Files.MimeMap and !Fresco.Runables
files.

In the MimeMap file add the line:
application/pdf PDF ADF .pdf

In !Fresco.Runables (if this file does not exists you have
to create it) add the line:
ADF

Now quit and restart !Fresco. When you view a .pdf file,
Fresco will filer_run the downloaded pdf file. If !PDF has
been seen, it will load and display the page.

Many thanks to Dean Murphy from ANT Ltd. Cambridge from
whom I recieved this information.
=====

Perhaps this facility exists already in Netsurf and I just don't know
about it.

--
Jim Nagel www.archivemag.co.uk