Node.js V8 --inspector Manager (NiMV3) is a Chrome add-on developed by June07. It is a free program that falls under the Browsers category and the Add-ons & Tools subcategory. NiMV3 is designed to manage DevTools with Node V8 Inspector, specifically for debugging workflows.

NiM, as it is commonly referred to, enhances the debugging experience for Node.js and Deno developers. It offers extended capabilities compared to the new edge://inspect option. The add-on manages the life-cycle of the Chromium DevTools window/tab, allowing users to focus more on debugging their code. No longer do users need to manually copy/paste DevTools URLs or continuously open/close tabs/windows.

One of the key features of NiM is its ability to automatically detect the URL generated when running Node with the --inspect option, whether locally or remotely. Users have the option to toggle between manual and automatic control of the DevTools interface. They can choose to open DevTools in a new tab or window, and determine whether DevTools should be focused or inactive on start. Additionally, NiM allows users to use a custom DevTools bundle.