Change gelbooru.com theme to darker, similar to konachan style. Added filtration image options, images with blacklist tags will be remove from search result. Also adden upvote&downvote button to preview page. Added buttons to hide submenu and red message in header.
Can work on almost any webcomic/manga page, preloads 5 or more pages ahead (or behind), navigates via ajax for instant-page-change, lets you use the keyboard, remembers your progress, and it's relatively easy to add new sites