Someone has taken an already excellent Firefox Extension, Screengrab(https://addons.mozilla.org/en-US/firefox/addon/1146) and made it even better. With Screen Grab to Wordpress (https://addons.mozilla.org/en-US/firefox/addon/8204) you can take a screenshot and post it directly to your blog. It also still has all the originally functionality of its predecessor. It uploads the images in either PNG or JPG (actually jpeg) format. [...]