The predecessor to the official ImageShack Toolbar, ImageShack right-click allows you to upload remote images to ImageShack's free image hosting service without the need to save them to your computer first. ImageShack right-click is intentionally light, requiring no configuration to maintain a simple and fast extension; thus offering an alternative to the ImageShack Toolbar in this sense.
Images uploaded through ImageShack right-click will populate a user's My Images panel if the users cookie is set by logging in to the ImageShack site.