I am trying to create a new browserContext in a headless Chrome by issuing raw CDP commands. Looking at the documentation of the CDP Protocol it seems straightforward enough: issue a Target.createBrowserContext command. When I issue the command I get the following error:

{"id":2,"error":{"code":-32000,"message":"Not allowed"}}

I’ve tried to see how Puppeteer does it by logging the messages it sends on different commands. When using browser.createBrowserContext() a new context is created successfully. When trying the same thing manually a few lines below, the call fails.

Some sample code to reproduce:

const puppeteer = require('puppeteer');

(async ()=>{
    console.log("STARTING BROWSER");
    const browser = await puppeteer.launch({args:["--remote-allow-origins=*"]});
    console.log("STARTING CONTEXT");
    const context = await browser.createBrowserContext();
    const page = await context.newPage();
    const cdp = await page.createCDPSession();
    await cdp.send("Target.createBrowserContext");
})();