UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:62.0) Gecko/20100101 Firefox/62.0

Steps to reproduce the problem:
1. Enable AlwaysOpenPdfExternally in GPO
2. Open a PDF in Chrome once GPO is deployed
3. Chrome will download PDF but not open Adobe Reader automatically.

What is the expected behavior?
Need a way when AlwaysOpenPdfExternally is enabled, to also set open_pdf_in_system_reader.  The open_pdf_in_system_reader setting is something that can be set by each user, but I need a way to deploy the open_pdf_in_system_reader to hundreds of public access PCs.

What went wrong?
Need a way when AlwaysOpenPdfExternally is enabled, to also set open_pdf_in_system_reader.  The open_pdf_in_system_reader setting is something that can be set by each user, but I need a way to deploy the open_pdf_in_system_reader to hundreds of public access PCs.

Did this work before? No 

Chrome version: Version 69.0.3497.100 (Official Build) (64-bit)  Channel: stable
OS Version: Windows 10
Flash Version: Shockwave Flash 31.0 r0

See https://productforums.google.com/forum/?utm_medium=email&utm_source=footer#!msg/chrome-admins/njj9qxcJVrs/3IQvsvIcAwAJ for details.