Sleazy Fork is available in English.
Loads manga chapter into one page in a long strip format, supports switching chapters and works for a variety of sites, minimal script with no dependencies, easy to implement new sites, loads quickly and works on mobile devices through bookmarklet
< Manga Loader NSFW (unmaintained)についてのフィードバック
I think I would need to see the affected pages to try to fix it. There are probably more differences than just using data URIs. Perhaps if you could save one or two of the webpages that would be enough (File > Save Page As). Feel free to message me privately.
PM'd
Thanks nobody123 for fixing the issue!
I've sent the fix along to @fuzetsu.
Issue with certain areas of 8muses, possibly related to base64 image urls?
On 8muses, normal galleries work great with your script. However for members only areas, the script doesn't work. The button shows up, but clicking it does nothing. I don't know a whole lot about web development, but to the best of my knowledge the images in members galleries use base64 image urls. I believe this because the "copy image location" gives me something that starts with "data:image/jpg;base64,/", then a massive alphanumeric string.
So is there any way to have the script work for those galleries? I can give you sample URLs if you need them. Many thanks for such a great script!