[img]https://imgur.com/0nEUfOc[/img]
<--- see no picture
Works fine for me, only difference is that you took link of the page instead of link of picture. See difference:
You
[img] https://imgur.com/0nEUfOc [/img]
Me
[img] https://i.imgur.com/0nEUfOc.png [/img]
So about your link you have to go right click on picture while you are on that page and to copy image location >> for Mozilla, for other browser try how to get image and not page. Also remember that each picture should have .png , .jpg , .gif, .pdf > not sure about pdf, never used on forums.