const browser = await puppeteer.launch({
    headless: false,
    defaultViewport: { width: 1440, height: 1000 },
    ignoreHTTPSErrors: true,
    args: [`--window-size=${1440},${1000}`], // new option
});
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DefaultViewport cannot be set at startup. The browser window size remains the same. In args, set ‘–window-size’.

Source address: www.jianshu.com/p/136a61a68…