Being able to view the developer console in the Postman Packaged App can be very helpful if you are trying to run tests or pre-request scripts. The process below explains how to enable and open the developer console for Postman Packaged App.
First you need to put this in the url bar in Chrome: chrome://flags/#debug-packed-apps
Then you need to click to “Enable” on this section “Enable debugging for packed apps”.
After you enable that you will need to restart Chrome.
Then enter this in the url bar of Chrome: chrome://inspect/#apps
You will then see the Postman – REST Client (Packaged App) with the “inspect” link under it. Click that to open the developer console.