Drag & Drop Pics into Webbrowser from XNview not working

[sandnix]

Hi,

I want to upload pics from my PC to Facebook via webbrowser (Chrome in this case).
I can drag and drop the jpegs from the windows explorer to the facebook tab without problems

But I cannot drag and drop jpgs from the XNview browser view into the facebook tab (or any browser tab at all).

What do I do wrong? Can I change an option somehwere to do this?

[xnview]

with 0.98?