http://jqyzxhjk6psc6ul5jnfwloamhtyh7si74b4743k2qgpskwwxrzhsxmad.onion/projects/torbrowser/design/index.html.en
Additionally, modern desktops now preemptively fetch any URLs in Drag and
Drop events as soon as the drag is initiated. This download happens
independent of the browser's Tor settings, and can be triggered by something
as simple as holding the mouse button down for slightly too long while
clicking on an image link.