When you click on the picture that you first see you get an enlarged view.
At the bottom left of that picture there's a 'View Raw Image' link.
Clicking on that gets the picture to fill your browser window.
Then right-click on the URL in your browser's address bar, to highlight it.
Select 'Copy'.
Come to AB, right-click in your post and select 'Paste'.
That's how I obtained the link above which, for me at least, opens a browser tab with the whole window filled by your picture.