I was playing around with Puppeteer today and I found out that there is no way (that I know of) to run script like this:

const puppeteer = require('puppeteer');

puppeteer.connect({browserWSEndpoint: <endpoint>}).then(async browser => {
  const page = await browser.currentPage();
  // other actions that would manipulate the current page
  browser.close();
});

The only way to get a Page instance seems to be browser.newPage() which is rather inconvenient if I want to run several test scripts that all connect to one browser instance.