[BUG] Documentation ambiguous for browser.contexts()

[thernstig]

Context:

• Playwright Version: 0.11.1
• Operating System: Linux

Code Snippet

(async () => {
  for (const browserType of ['chromium']) {
    const browser = await playwright[browserType].launch();
    console.log(browser.contexts());
    await browser.close();
  }
})();

Describe the bug

https://github.com/microsoft/playwright/blob/master/docs/api.md#browsercontexts says:

Returns an array of all open browser contexts. In a newly created browser, this will return a single instance of BrowserContext.

However, in a newly created browser it returns an empty array.