Someone on PixelJoint made an extension for chrome that fixes the blurred zoom on their site, I talked to him about getting it to work for Pixelation too and he said it's most likely possible but that he didn't have the time to try it out himself.
Here's a link to the extension. If you click file there's a download option, once you download it you can just check developer mode on the extension page and go to load unpacked extension.
Anyway, I could ask him for the source code for it if someone wants to try and get it working for Pixelation too, an extension for just these two sites probably isn't the best solution, but its better than nothing I guess.
I don't know a thing about making extensions by the way so it's possible the files you need to modify it are already there.
