I made a demo page to reproduce this, where you can see errors in chrome console, but the extension doesn't catch anything: (the app.js file is produced by webpack so is a bit large and hard to read) ...

no commente, this tool is too handy i like that deveoper has the times to work on this. when i see the red sign it triggers my urge to check the console for errors, gives me thoose goose bumps, just a ...