title: Tell Puppeteer to open Chrome tab instead of window
body: <p>If I have an existing Google Chrome window open, I'd like to tell puppeteer to open a new tab instead of opening a new window. Is there a way to do that? is there some option or flag I can pass to puppeteer to accomplish this?</p>
  
  <p>I have:</p>
  
  <pre><code>const puppeteer = require('puppeteer');
  
  (async function () {
  
    const b = await puppeteer.launch({
      devtools: true,
      openInExistingWindow: true /// ? something like this?
    });
  
    const page = await b.newPage();
    await page.goto('https://example.com');
  
  })();
  </code></pre>