Try Another... Rated 1 out of 5 stars

As a Web-page screen-Shot'ter, this addon lacks behind almost all of its rivals like screengrab, abduction, shooter and shot pimp...

Besides unique sidebar usage, it fails to provide the basic necessities of a shotter featured in other shotters. It also limits looong page shots to 10000px which is not good...

In short, try another screenshot addon which will mostly work better than this...