Postman Interceptor by Postman

Postman Interceptor acts as a browser companion to the Postman desktop app. Interceptor enables you to capture network requests and cookies directly from Firefox.

Once Interceptor is running in Firefox, you can start a debug session, which is a time-bound session of traffic capture. You can start, pause, and stop an interceptor debug session, then later start another one. Each debug session is logged in the History tab, and displays the total session time and all traffic captured. From the logged session, you can send requests and responses to a collection and save cookies to the Postman cookie jar.