Chrome Emacs by Karim Aziiev

Chrome Emacs allows bi-directional editing of text areas and online text editors directly from Emacs. Experience seamless editing with features like cursor and scroll synchronization, auto-major mode detection, and support for multiple online editors.
Features:

1. Works with most online editors: CodePen, StackBlitz, JSFiddle, LeetCode, etc.
2. Cursor and Scroll Sync: Live-code seamlessly in online editors.
3. Editable Areas Navigation: quickly switch focus using hints.
4. Auto-Major Mode Detection: Automatically picks the right editing mode.

Installation:

1. Install the add-on for your browser.
2. In Emacs install the Atomic Chrome fork.

Usage:

1. Start the server in Emacs with M-x atomic-chrome-start-server.
2. Activate the extension in your browser and start editing directly in Emacs.

For more information, visit the GitHub repository.