lanhu_download/public/background.js

chrome.runtime.onMessageExternal.addListener((request, sender, sendResponse) => {
    chrome.app.window.create('index.html', {
        id: '1',
        frame: 'none',
        innerBounds: {
            minWidth: 500,
            maxWidth: 500,
            width: 500,
            minHeight: 650,
            maxHeight: 650,
            height: 650
        }
    });
});