incognito-page.js

const Page = require('puppeteer/lib/Page');

// the following 2 methods are originally from: https://github.com/GoogleChrome/puppeteer/issues/85#issuecomment-341743259, with some modification to fit puppeteerv1.0.0
async function newPageWithNewContext(browser) {
    const { browserContextId } = await browser._connection.send('Target.createBrowserContext');
    const { targetId } = await browser._connection.send('Target.createTarget', { url: 'about:blank', browserContextId });
    const target = await browser._targets.get(targetId);
    const client = await browser._connection.createSession(targetId);
    const page = await Page.create(client, target, browser._ignoreHTTPSErrors, browser._appMode, browser._screenshotTaskQueue);
    page.browserContextId = browserContextId;
    return page;
}

async function closePage(browser, page) {
    if (page.browserContextId != undefined) {
        await browser._connection.send('Target.disposeBrowserContext', { browserContextId: page.browserContextId });
    }
    await page.close();
}
module.exports = {
    beginIncognito: async browser => {
        let page = await newPageWithNewContext(browser);
        page.endIncognito = async() => closePage(browser, page);
        return page;
    }
};

Thanks for this. However, I've noticed that the _targets property isn't set in the browser object – at least not in the version from npm.

Thanks for the example. It seems that microsoft has changed their cookie names. MS0 has to be checked instead of MUID in my case.

official API available since v1.5.0: browser.createIncognitoBrowserContext()