CORS Helper is a lightweight Chrome add-on developed by Atom. It falls under the category of Browsers and is specifically categorized as an Add-ons & Tools.

CORS Helper allows developers to easily modify Ajax responses by granting access to specified resources from different source servers. With this tool, users can set different return values and customize the value of the HTTP response header.

To enable cross-source resource sharing, simply install the plugin and click the icon in the upper right corner. From there, you can customize the plugin's settings by clicking "Customize" and accessing the "HTTP Response Header" and "White List" pages.

CORS Helper is a useful tool for developers working on web development projects that require handling CORS-related issues. Its simplicity and ease of use make it a valuable addition to any developer's toolkit.