From November 25th, 2016 to November 23rd, 2017, 33% user give 5-star rating, 33% user give 4-star rating, 33% user give 3-star rating. for Batoto Night Mode chrome extension.
This extension works by inverting the colors of the reader frame from white to dark grey. In that, it works perfectly… but, only if you're using keyboard navigation (left and right to change pages) or click the drop-down menus. If you click pages <i>directly</i>, the reader frame reverts to its bright white coloration. So, aside from that, I'd say this extension works pretty well! It's far more reliable and consistent than manually inverting the colors via JavaScript command, too.
It doesn't appear to be functioning anymore.
Does its job. :)