Screengrab is a Firefox extension that makes it easy to save a web-page as an image. It will capture what you can see in the window, the entire page, just a selection, a particular frame... basically it saves webpages as images - either to a file, or to the clipboard. You can also download it from https://addons.mozilla.org/it/firefox/addon/1146/ More info »
seriously outdated now. sometimes doesnt screen shot, wont save, copy to clipboard. latest version is over 1 year old. shows up in firefox 4 status bar, which is hidden by default, so in an invisible place.
