title: How I can update the environment table in pytest-html
body: <p>I am trying to edit the default pytest-html report and want to update Environment table. </p>
  
  <p>I need to add the rows for browser, Application URL and other variable in environment table and delete some default rows. </p>
  
  <p>I have used to add extra variable in environment table</p>
  
  <pre><code>@pytest.fixture(autouse=True, scope='session')
  def _environment(request):
      request.config._metadata['URL']=os.environ['url']
  </code></pre>
  
  <p>However when I add multiple metadata variable it throws an error</p>
  
  <pre><code>@pytest.fixture(autouse=True, scope='session')
  def _environment(request):
      request.config._metadata['URL']=os.environ['url']
      request.config._metadata['Browser']=os.environ['browser']
  </code></pre>
  
  <p>Can anyone help me to achieve it</p>