In Chrome under settings -> Disable ask everytime where the file should be saved.

That just automatically puts the file in the downloads directory.  I was looking to have the file open in the default application

Have never ever wanted to adjust the download location.  Don’t even want to download a physical file.  I would like to have the browser  recognize that in the response header that a file type was requested.  After that send have the browser send the  bitstream to the os.  The os would then recognize that a file type of pdf was sent and sends the stream to acrobat.  

I think it’s been done like that since Netscape   Don’t know why we can’t do it any more 

Hi Brian, 

Thank you for your question. While SmarterMail doesnt control that aspect it is possible to preview attachments using OnlyOffice or Collabora. 

I hope this helps.

Kind Regards,