Sleazy Fork is available in English.
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
You're right, I'll try to put something together to update the updater. Either way, Greasemonkey and Tampermonkey already include built-in auto-update
A new update checker?
This script still finds updates from userscripts.org but the server never responses right?