title: Browser is not defined
body: <p>I added in my karma-config.js this frameworks:['ng-scenario','jasmine'],
  throw the error browser is not defined.My project is angular seed(<a href="https://github.com/angular/angular-seed" rel="nofollow">https://github.com/angular/angular-seed</a>) project added extra login page</p>
  
  <p>my command prompt run </p>
  
  <p>karma start karma.conf.js</p>
  
  <p>browser is not defined.</p>
  
  <p>my karma.conf.js</p>
  
  <pre><code>frameworks: ['jasmine', 'ng-scenario'],
  
  plugins: ['karma-ng-scenario', 'karma-jasmine', 'karma-chrome-launcher'],
  
  files: [
    'app/lib/angular/angular.js',
    'app/lib/angular/angular-*.js',
    'test/lib/angular/angular-mocks.js',
    'app/js/*.js',
    'test/unit/*.js'
  ],
  
  exclude: [
    'app/lib/angular/angular-loader.js',
    'app/lib/angular/*.min.js',
    'app/lib/angular/angular-scenario.js'
  ],
  </code></pre>