YouTube
How To Create A Google Chrome Extension: A Step-by-Step Tutorial
https://www.youtube.com/watch?v=uh84Asy2W4sBuild & Publish a Custom Google Chrome Extension
https://www.youtube.com/watch?v=wHZCYi1K664
General
THE BEGINNER’S GUIDE: Build a simple Chrome Extension in minutes
https://medium.com/@LindaVivah/the-beginner-s-guide-build-a-simple-chrome-extension-in-minutes-498308ea406aHow to Build a Simple Chrome Extension in Vanilla JavaScript
https://medium.com/javascript-in-plain-english/https-medium-com-javascript-in-plain-english-how-to-build-a-simple-chrome-extension-in-vanilla-javascript-e52b2994aeebHow to Create and Publish a Chrome Extension in 20 minutes
https://medium.freecodecamp.org/how-to-create-and-publish-a-chrome-extension-in-20-minutes-6dc8395d7153How to Create a Chrome Extension in 10 Minutes Flat — SitePoint
https://www.sitepoint.com/create-chrome-extension-10-minutes-flat/