Specific to Flickr URLs, its the '_d' at the end. Remove it and you can view it normally in the browser. But as danielbln wrote, that 'Content-Disposition' head

Specific to Flickr URLs, its the '_d' at the end. Remove it and you can view it normally in the browser. But as danielbln wrote, that 'Content-Disposition' header is what forces a download in general. https://live.staticflickr.com/65535/51847931721_c3feebd201_o.jpg https://live.staticflickr.com/65535/51847931721_c3feebd201_o...