Help configure React Starter Kit

My company is starting a new project based off React Starter Kit and I can’t get it to debug in Firefox. To reproduce this you’d need to clone from https://github.com/kriasoft/react-starter-kit and add a VSCode debug configuration. Here’s my .vscode\launch.json:

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "chrome",
            "request": "launch",
            "name": "Launch Chrome",
            "url": "http://localhost:3000",
            "webRoot": "${workspaceFolder}"
        },
        {
            "name": "Launch localhost",
            "type": "firefox",
            "request": "launch",
            "reAttach": true,
            "url": "http://localhost:3000",
            "webRoot": "${workspaceFolder}"
        },
    ]
}

Then I set a breakpoint in the render function (src\routes\home\Home.js) and press F5. The chrome debugger works just fine - the breakpoint gets hit and VSCode stops. But the FF debugger for some reason does not work. The debugging session starts, a browser instance gets started, but the breakpoint does not get hit. What am I missing here? FWIW I enabled “Enable add-on debugging” and my FF version is 66.0.2 (64 bit)

[hbenl]

@rugk facebook/create-react-app#6828

@Fubuchi Perhaps there’s a misunderstanding here: I didn’t mean to set devtool to *-eval-* literally, but to set it to any of the allowed values that contain -eval-.

[hbenl]

@Fubuchi it’d be interesting to see what shows up when you expand the webpack:// entry in the Loaded Scripts Explorer for Firefox. Furthermore, your webpack config and a diagnostic log from the debugadapter (with the PathConversion and SourceMappingThreadActorProxy loggers set to Debug) could be helpful to diagnose the problem.

@synchronos-t please set the SourceMappingThreadActorProxy logger to Debug (it will show messages about the sourcemapping done when it tries to set breakpoints) and then post those messages for one breakpoint that you’re trying to set and the corresponding message from the PathConversion logger for that file.