title: WebdriverIO click not working on firefox but working on chrome
body: <p>I am writing a simple webdriverIO test where I am clicking on an element. When running the test on Chrome, it works fine but for some reason, nothing happens when I run the test on Firefox. There is no error for this. </p>
  
  <p>This is the element </p>
  
  <pre><code>&lt;span class="cdc4f612"&gt;More Options&lt;/span&gt;
  </code></pre>
  
  <p>I am using the following XPath to locate the element: </p>
  
  <pre><code>//span[text()='More Options']
  </code></pre>
  
  <p>or</p>
  
  <pre><code>//*[text()='More Options']
  
  browser.click(xpath)
  </code></pre>
  
  <p>I am using the following versions:</p>
  
  <p>Selenium Standalone Server: 3.7.1</p>
  
  <p><p>Firefox: 56.0.2 (64-bit)
  <p>Geckodriver: 0.18.0
  <p>Ubuntu: 17.04</p>