Install instructions:
Visit the chrome extensions url in Chrome
chrome://extensions/Switch on Developer Mode on the top right
Click the Load Unpacked button on the top left
Navigate to the darkviewer directory and click Select Folder
You should now be able to see the Dark Viewer extension in your list
Feel free to disabled developer mode after the install process.
Congrats! You can use Dark Viewer as a toggle button on any website on chrome, and it will attempt to turn the page into dark mode.
It will also save the setting you had on that page, so you won't need to toggle it back on next time you visit the page.