Taking full screenshot and thumbnail ofter required for developers, testers, project managers, and many many more to convey ideas better. To communicate things better to your team you might need screenshot. This work under Mac, Linux, Windows and even Mobile phones Android and iPhone. There are some browser extensions that do this only. However, extensions don't work on mobile phones. We are truly cross-platform. We work with almost all the sites even with Ajax heavy sites. There is 99% chance that this tool will give you exactly what you need.
We generate one full screenshot, one full square screenshot and one thumbnail of 200px * 200px
P.S. - We are trying to but at present flash and Java is not supported.