title: Not able to run webdriver scripts from jmeter
body: <p>I am trying to execute webdriver script from jmeter.
  I have installed webdriver plugin.
  Created firefox config element and web driver sampler.</p>
  
  <p>Added script under webdriver sampler - </p>
  
  <pre><code>WDS.sampleResult.sampleStart()
  WDS.browser.get('http://google.com')
  WDS.sampleResult.sampleEnd()
  </code></pre>
  
  <p>But while executing, browser is not opening.</p>