[PDF download insteaad of opening] Trick to force download file #PS17

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If this problem is stil in the to do's list for anyone the solution for the latest Prestashop version (1.7.6.8) for opening PDF's or other documents in browser windows is to change 2 things:
1. Change the controllers/front/AttachmentController.php file like so:
ORIGINAL:
header('Content-Disposition: attachment; filename="' . utf8_decode($a->file_name) . '"');
CHANGED:
header('Content-Disposition: inline; filename="' . utf8_decode($a->file_name) . '"');

2. Change the .htaccess content of this line:
<FilesMatch "\.pdf$">
      Header set Content-Disposition "Attachment"      /// Alter this line like so:   Header set Content-Disposition "Inline"
      Header set X-Content-Type-Options "nosniff"
 </FilesMatch>