Sourcery is a free Chrome extension developed by JordanFitz. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. The main purpose of Sourcery is to highlight source code files in the browser, offering a more visually appealing and user-friendly experience.

In addition to the pre-defined themes, Sourcery also allows users to write custom CSS, giving them the freedom to personalize the code highlighting experience according to their preferences. This flexibility ensures that developers can create a coding environment that suits their needs and enhances their productivity.

With its ability to highlight source code files and the option to customize the appearance, Sourcery offers a valuable tool for developers who frequently work with code in their browser. This extension provides a visually appealing and user-friendly experience, making it easier to read and understand code, ultimately improving productivity and efficiency.