Userscripts like Webcomic Reader?

Webcomic reader used to work great here, are there any addons like it?

In case you're wondering what Webcomic Reader is, it preloads images on a page for you and lets you browse through each image with the arrow keys, instead of needing to open each image individually.

There is no need to doublepost. Just edit your OP.
Also, you probably could've just posted in topic #8502