Frank - Header Injector is a Chrome extension designed to facilitate the injection of custom HTTP request headers for specific websites or domains. This tool is particularly beneficial for developers and testers working with APIs that require authentication through headers such as Bearer tokens, Basic Auth, or API Keys. Users can easily add headers manually or upload them from a .txt file, streamlining the process of managing complex requests.

The extension also features customizable settings that allow users to modify the auto-reload criteria when changes to headers or URLs are made. Additionally, Frank provides the option to enable or disable its functionality globally, giving users full control over how and when headers are injected. With its straightforward interface and targeted functionality, Frank - Header Injector enhances the web development experience significantly.