Greasy Fork is available in English.
OBSOLETE!! Mark all visible chapters read. If there are too many chapters for one page you will need to do each page separately.
This script is now OBSOLETE as the new MangaDex website includes this functionality by default.
Adds a button to mark all visible chapters read. If there are too many chapters for one page you will need to do each page separately.
Developed in Tampermonkey v4.10.6105 using Firefox 73.0 (64-bit) on Windows 10.
I sometimes make dark CSS themes and JS userscripts. Some of them aren't terrible.