title: Webpack DevServer --open option
body: <p>I am running windows 10. Default browser is Edge. I would like Webpack to open in firefox.</p>
  
  <p>I have tried </p>
  
  <pre><code>devServer: {
        inline: true,
        open: 'mozilla',
        port: 8080
    },
  </code></pre>
  
  <p>But still open in Edge. Have also tried 'firefox'. Looking at the docs, it gives an example for chrome, which as various names depending on the OS.</p>
  
  <p>Does anyone know what I need for firefox on windows 10?</p>