I'd love to do an extension for deviantART, but unfortunately that would be impossible (with my current knowledge). The nice thing about google and facebook is that the thumbnail locations and the full-sized image locations have a definite relation. For facebook you change a 't' to an 'n' and you get the full image. For google the url for the full sized image is contained in the thumbnail url. I can't find any such relation in deviantART, the url for full-sized images has no definite relation to the url for the thumbnail. I'm sure someone more talented and/or knowledgeable could attempt it though. Talk to the the guy who made inyofac3book.

Wow, I haven't installed it but that code looks about a thousand times better than anything I've managed to come up with.

I fixed the code so englishmen's issue should no longer be a problem. Anything else?

Anyone have any feedback for this?

No problem, I think it's about as good as it can possibly be. Post here if you have any problems, and spread the word across facebook.

Yeah, I'm not gonna lie to you guys. I don't know javascript. Everything I've done has been by trial and error. The one mistake I just now corrected is the "resizing" of pictures that are already at their full size. I'm posting it now. I'll work on that issue.

http://userscripts.org/scripts/show/7839

This is my update to the original. It enlarges all photos, not just profile pictures.

Any chance you could write a script like this that could make white text on a black background for any site?