title: Puppeteer window not scrollable
body: <p>I am writing test in CodeceptJS.
  My settings is:</p>
  <pre><code>  exports.config = {
    tests: './*_test.js',
    output: './output',
    helpers: {
      Puppeteer: {
        url: '',
        show: true,
        defaultView: null,
        userAgent:'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.105 Safari/537.36'
      },
    },
  </code></pre>
  <p>But when I run my test, Chromium browser have no vertical scroll. When I load my testing url in not automated browser, page loads correctly with ability to scroll my page. What I am missing in my setup to make browser to work as normal browser when using non headless mode?</p>