Firefox Extensions

ImageShack right-click

Upload to ImageShack via the context menu.

More about this add-on

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.

https://addons.mozilla.org/en-US/firefox/addon/imageshack-right-click/

I haven't used ImageShack in ages. Now if there was one for ImageVenue or TinyPic... that would be handy...

None that I can find on those. But somebody may be able to use that extension.