Greasy Fork is available in English.
Shows all pages at once in online view for these sites: Alandal, Batoto, BilibiliComics, ComiCastle, Comick, Dynasty-Scans, INKR, InManga, KLManga, Leitor, LHTranslation, Local Files, LynxScans, MangaBuddy, MangaDex, MangaFox, MangaHere, Mangago, MangaHosted, MangaHub, MangasIn, MangaKakalot, MangaNelo, MangaNato, MangaOni, MangaPark, Mangareader, MangaSee, Manga4life, MangaTigre, MangaToons, MangaTown, ManhuaScan, MangaGeko.com, MangaGeko.cc, NaniScans, NineManga, OlympusScans, PandaManga, RawD
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Its a good idea, when I find time I'll see what I can do. No promises, if I don't find a good way to do it I won't add.
g.e-hentai.org/Exhentai suggestion
It could benefit greatly from a page preview bar on the sideThis is more preference but the page preview is soo convenient to going back to old pictures.
https://chrome.google.com/webstore/detail/ge-hentaiorg-better-navig/hebdpcfmigeenppdkejdglgkggnkmpfb