The Prettier Chrome Extension, developed by jamesdmosier, is a free browser add-on that allows you to easily format your JavaScript code. This extension is designed to work on the Chrome platform and falls under the category of Browsers, specifically Add-ons & Tools.

With the Prettier Chrome Extension, you can format your JavaScript code directly on any editable element, such as `textarea` and `input[type=text]`. It provides a convenient solution for formatting code that is not within your code editor or IDE.

To get started, simply install the extension and ensure that your code fences are defined as JS blocks (```js var abc = 123; ```). Once installed, you can easily format your code via a handy context menu.

The Prettier Chrome Extension offers a range of options that are available to be set using the extensions options page. You can customize the formatting according to your preferences, leveraging all the options defined in the Prettier API.

Overall, the Prettier Chrome Extension is a valuable tool for developers who want a quick and efficient way to format their JavaScript code directly within the Chrome browser. It provides a seamless experience and helps maintain consistent code formatting across different platforms.