The web filesystem lets you access any resource with a URL.

One such resource would be this very webpage. Go to the DiffManager’s Browse bar and select Web

then type in the url of this page http://docs.diffplug.com/1.0.0/Filesystems/Web

and open it as a text file.

From this, we see that the url for the above screenshot is http://docs.diffplug.com/1.0.0/images/Web-browse-textviewer.png , which we can open as an image.