OpenAPI DevTools is a Firefox extension designed for developers looking to streamline the API specification process. This tool generates OpenAPI specifications in real-time by capturing network requests as users interact with any website or application. Once installed, it adds a dedicated OpenAPI tab to Firefox DevTools, enabling immediate access to the generated specifications.

Key features include automatic merging of request and response headers, bodies, and query parameters, ensuring that the API documentation remains up-to-date as new interactions occur. Users can easily view and download the generated specifications, and it allows for session exporting and sharing, making collaboration simpler among development teams.