Greasy Fork is available in English.
Better Pixiv viewing | Fullscreen images | Faster searching | Bigger thumbnails | Download ugoira MKV | Ugoira seek bar | Download manga ZIP | One-click like, bookmark, follow | One-click zoom and pan
Try r178. I usually use a bookmark tag for slideshows that doesn't have any animations, but it should move to the next image at the end.
Love the script! But when I tried to use the "Slideshow" option it broke whenever an animated post came up. I've tried running the script on both tampermonkey and violentmonkey with no success. I also tried 3 different browsers to see if that was the issue but also with no success. Maybe a problem on my end but I would love to hear what could be the cause.