For those of you who are Firefox users, you may sometimes need to do a screenshot. Instead of hitting the ctrl and print screen keys on your keyboard, why don't you try a Firefox add-on called Pixlr Grabber. This is an excellent tool for those who want to grab an entire page, only the visible part of a page, or select the area yourself that you would like to capture. Once you have the captured the image, you can decide to edit it with the tools available in Pixlr.com, share on Imm.io, save to your desktop or copy to your clipboard.
I have used this free tool many times and have been very happy with it.