MDN Search автор Jackie(Guokai) Han

If you are a web developer, you certainly need to check MDN web docs frequently. This extension provides you with search suggestions for MDN web docs. You can open a document directly by clicking a suggestion, instead of searching on Google first.

How to use it?
1. Enter the keyword "mdn" in the browser address bar.
2. Then, press key "space".
3. Enter the content you want to search, e.g. "array".

Note: only English version search is supported.

Source Code: https://github.com/hanguokai/mdn-search