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
readmanga.me
Please add this site to your script.
Example: http://readmanga.me/fighting_spirit/vol77/732