Open downloads in browser

Hi,

First, note that this can depend on the browser's settings:
apemobile.zendesk.com/hc/en-us/articles/...opening-in-a-new-tab
Second, in the headers sent back to the browser, HikaShop specifies a genertic content-type, and is also doesn't set the content-disposition to inline: stackoverflow.com/questions/34891513/vie...stead-of-downloading
That's because HikaShop can be used with many different types of files and this is not necessarily wanted.
So in the file administrator/components/com_hikashop/classes/file.php, you'll find this code:

				header('Content-Type: application/octet-stream');
				header('Content-Disposition: attachment; filename="' . $name . '"');

				header('Content-Type: application/pdf');
				header('Content-Disposition: inline; filename="' . $name . '"');