Stable-gray is a Chrome add-on that allows users to easily inject custom header fields into their requests. This functionality is particularly useful for developers and testers who need to ensure that their requests are properly matched and processed by the server. The extension supports the configuration of specific domains, providing flexibility in managing how requests are handled based on the headers they contain.

With its user-friendly interface, stable-gray simplifies the process of modifying request headers. Users can set up custom headers quickly, making it an essential tool for those working with APIs or web services that require precise header management. As a free add-on, it stands out in the Browsers category, specifically within Add-ons & Tools, offering significant utility for enhancing web interactions.