I tried downloading the blue image in myheritage.com by right clicking. But somehow I always get the picture with parachute no matter where I right click in the blue area. I downloaded the complete page in firefox and then opened images the blue background was missing. How did they manage to do that? Would like to know the method.

PS: I went through FAQ of webmasters.SE, nothing was said regarding the explicit mentioning of a third party domain name in the question so I am going ahead and posting it.


Edit: How is the image above 955M profiles is also not available to download when we right click? Whats the general convention to obfuscate images URLs?