https://www.udemy.com/chrome-extensions-for-web-developer/
not in english and No teaching about creating extension.. just shows us existing ones...
If you want to know more about Chrome extensions, I can help you. This article is about essential chrome extensions.
When I read this, I noticed a few really useful extensions: http://blog.affilight.com/2018/04/11/essential-seo-chrome-extensions/.
Alice_Swan,
Thanks. Reps added.