This extension re-enables the context menu.
Indeed, many sites prohibit the right-click on images, pretending to protect their content. I think it is illegitimate.
In the meantime, this extension provides a workaround, by resetting the oncontextmenu to its default behaviour on many elements of the page. Oh, as a bonus, it works for Flickr and Youtube html5 videos too!
If a site is not supported, please report it in the bug tracker, not in the comments.
If a site is broken by the extension, please report it in the bug tracker, not in the comments.
However, a nice comment is always welcome :-)