Inspecting Chrome extension interfaces with React DevTools
Chrome does not allow extensions to modify other extensions, so React DevTools are not available in the Chrome DevTools interface when inspecting a Chrome extension interface. The React team has provided a standalone app that can be connected manually, but it requires some setup. The React DevTools readme includes some instructions, but they leave out an important step if you're debugging within a Chrome extension.
Here's an overview of how to set this up locally for an extension:
Run the standalone React DevTools app
The easiest way to start the standalone app is: