When trying to copy the content of the JSON data, clicking the little copy button and the page gives visible feedback but the content is not sent to the clipboard. In fact, in order to actually copy that data, you have to click around to unselect the text and then you can manually copy the contents.
@jeremy.tellier fyi on this
Looks like the latest release, I will get a new one out with a gif asap
Oops, that should be "fix"