Hello!
I tried the following:
I have right-clicked the image, selected "Open picture in a new tab" (working with Firefox), then copied the URL from the URL field and pasted that in the source box of image posting here:

Sorry to say, the FSM forums are like 10 years behind state of art, other forums allow "pasting" pictures - which requires some storage space for every member, that usually is limited to some MBs, but makes participating so much easier.
Hope this helps, have a nice day
Paweł