I don't know how, but there's a site that can let you paste images without any obvious flash/java crap. I don't have to explain how incredibly handy that would be.
Unfortunately, Stack Exchange is unable to get the images from that site, not even by direct URL, so I have to create a file like an idiot every time.
It appears like this is just due to Stack Exchange not supporting pasting images to upload on Firefox, could this feature please be added?