DevTools location / placement - opening devtools on the bottom instead of side

I have this which works:

 const browser = await puppeteer.launch({
    headless: false,
    devtools: true,
    ignoreDefaultArgs: true,
    args: args.concat([
        '--remote-debugging-port=9223',
        '--load-extension=/some/local/path/to/your/extension'
      ]
    )
  });

however this opens DevTools on the right hand side, instead of the bottom of the browser. See:

Is there a flag we can use to tell Chrome to open DevTools on the bottom of the page?

I looked through the issues and don’t see a related question, thanks, sorry if it’s a dumb question but was hard to find an answer with Google.

[zahhar]

@chriscalo I will leave it here in case someone is still looking how to launch Puppeteer with DevTools stacked to bottom:

const puppeteer = require('puppeteer-extra');
const puppeteerPrefs = require('puppeteer-extra-plugin-user-preferences');

(async () => {

    puppeteer.use(puppeteerPrefs({
      userPrefs: {
        devtools: {
          preferences: {
            currentDockState: '"bottom"'
          },
        },
      },
    }));

    const browser = await puppeteer.launch({
        headless: false,
        devtools: true
    });

})();

[skyiea]

@aslushnikov Where did you get devtools.currentDockState = 'bottom'? Can’t find such a pref in the list.