How to maximise Screen use in Pupeteer ( non-headless )

You probably would want to set a certain screen size, which any real browser has:

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.setViewport({ width: 1366, height: 768});
  await page.goto('https://example.com', {waitUntil: 'networkidle2'});
  await page.screenshot({path: 'example.png'});

  browser.close();
})();