Wrong configuration

[tomfun]

I've used selenium hub, with the only running chrome browser. With default configuration (from readme) it attempts to launch firefox, and in my case fails.
This configuration worked for me:

// ...
    customLaunchers: {
      selenium_chrome: {
        base: 'Selenium',
        config: {
          desiredCapabilities: {
            browserName: 'chrome', // <-- ! browser name here
          },
          // host: 'selenium-hub',
          host: process.env.SELENIUM_HOST,
          port: 4444,
          path: '/wd/hub',
        },
        name: 'Karma Test',
      },
    },
    hostname: process.env.KARMA_HOST || 'localhost',
// ...