I posted this to twitter the other day, and I hear it's a feature that Newgrounds is planning to implement, but in the mean time - I wrote an extension which embeds full artwork into the posts on your feed:
Chrome - https://chrome.google.com/webstore/detail/better-newgrounds-feed/emldjfbleihaiapcapeojadckleeppec
Firefox - https://addons.mozilla.org/en-US/firefox/addon/better-newgrounds-feed/
Modeseven
!!!!! Oh damn