I hope I'm giving enough info on this issue. I'm new to the mediawiki community (and development in general) but I thought I'd log a bug I'd noticed.
Expected behavior: When I right click and "copy" an image in one tab of my browser, that I can go over to the Visual Editor and paste that image into a page that is being edited. Also expected is the ability to drag and drop an image from one tab to the next.
Actual behavior: it does nothing.
See attached video.
Also see previous discussion that led to creation of this issue. https://phabricator.wikimedia.org/T39932