"View Image" local resource linking (Windows) — Mozilla

Normally Mozilla-based clients prevent web content from linking to local files but Eric Foley reports a partial bypass of this restriction by using Windows filename syntax (on a Windows computer) rather than a file:/// URL as the SRC= attribute. The image will not be loaded on the web page–it will appear as a broken image–but if a user can be convinced to right-click and select “View Image” then the content will be loaded. Since the image will replace the current document attacker script cannot be run on it. Loading a local file at a known location is about the extent of this attack.