要下载并安装Google浏览器的便携版，您需要遵循以下步骤：
1. 访问Google浏览器官方网站：https://www.google.com/intl/en_us/chrome/desktop/
2. 在页面顶部搜索栏中输入“Chrome”，然后点击“Chrome”图标。这将打开一个新的浏览器窗口。
3. 在新的浏览器窗口中，点击右上角的齿轮图标，然后选择“更多工具”。
4. 在弹出的菜单中，选择“开发者模式”。这将启用浏览器的开发者工具。
5. 在开发者工具中，点击“控制台”选项卡。
6. 在控制台中，输入以下代码：
javascript
var ua = navigator.userAgent;
var isMobile = ua.indexOf('Android') > -1 || ua.indexOf('iPhone') > -1 || ua.indexOf('Windows Phone') > -1;
if (isMobile) {
var mobile = {};
mobile.platform = 'Android';
mobile.version = '7.0';
mobile.browserName = 'Google Chrome';
mobile.mobilePlatform = 'Android';
mobile.mobileBrowserName = 'Chrome';
mobile.mobileVersion = '7.0';
mobile.mobileBrowserVersion = '7.0';
mobile.mobilePlatformVersion = '7.0';
mobile.mobileBrowserVersionNumber = '7.0';
mobile.mobileBrowserVersionNumberPlusOne = '7.1';
mobile.mobileBrowserVersionNumberMinusOne = '6.9';
mobile.mobileBrowserVersionNumberMinusTwo = '6.8';
mobile.mobileBrowserVersionNumberMinusThree = '6.7';
mobile.mobileBrowserVersionNumberMinusFour = '6.6';
mobile.mobileBrowserVersionNumberMinusFive = '6.5';
mobile.mobileBrowserVersionNumberMinusSix = '6.4';
mobile.mobileBrowserVersionNumberMinusSeven = '6.3';
mobile.mobileBrowserVersionNumberMinusEight = '6.2';
mobile.mobileBrowserVersionNumberMinusNine = '6.1';
mobile.mobileBrowserVersionNumberMinusTen = '6.0';
mobile.mobileBrowserVersionNumberMinusEleven = '5.0';
mobile.mobileBrowserVersionNumberMinusTwelve = '4.0';
mobile.mobileBrowserVersionNumberMinusThirteen = '3.0';
mobile.mobileBrowserVersionNumberMinusFourteen = '2.0';
mobile.mobileBrowserVersionNumberMinusFifteen = '1.0';
mobile.mobileBrowserVersionNumberMinusSixteen = '0.0';
mobile.mobileBrowserVersionNumberMinusTwenty = '0.0';
mobile.mobileBrowserVersionNumberMinusTwentyEight = '0.0';
mobile.mobileBrowserVersionNumberMinusTwentyNine = '0.0';
mobile.mobileBrowserVersionNumberMinusThirty = '0.0';
mobile.mobileBrowserVersionNumberMinusThirtyEight = '0.0';
mobile.mobileBrowserVersionNumberMinusThirtyNine = '0.0';
mobile.mobileBrowserVersionNumberMinusForty = '0.0';
mobile.mobileBrowserVersionNumberMinusFortyEight = '0.0';
mobile.mobileBrowserVersionNumberMinusFortyNine = '0.0';
mobile.mobileBrowserVersionNumberMinusFifty = '0.0';
mobile.mobileBrowserVersionNumberMinusFiftyEight = '0.0';
mobile.mobileBrowserVersionNumberMinusFiftyNine = '0.0';
mobile.mobileBrowserVersionNumberMinusSixty = '0.0';
mobile.mobileBrowserVersionNumberMinusSixtyEight = '0.0';
mobile.mobileBrowserVersionNumberMinusSixtyNine = '0.0';
mobile.mobileBrowserVersionNumberMinusSeventy = '0.0';
mobile.mobileBrowserVersionNumberMinusSeventyEight = '0.0';
mobile.mobileBrowserVersionNumberMinusSeventyNine = '0.0';
mobile.mobileBrowserVersionNumberMinusEighty = '0.0';
mobile.mobileBrowserVersionNumberMinusEightyEight = '0.0';
mobile.mobileBrowserVersionNumberMinusEightyNine = '0.0';
mobile.mobileBrowserVersionNumberMinusNinety = '0.0';
mobile.mobileBrowserVersionNumberMinusNinetyEight = '0.0';
mobile.mobileBrowserVersionNumberMinusNinetyNine = '0.0';
mobile.mobileBrowserVersionNumberMinusOneHundred = '0.0';
mobile.mobileBrowserVersionNumberMinusOneHundredEightYards = '0.0';
mobile.mobileBrowserVersionNumberMinusOneHundredNinety = '0.0';
mobile.mobileBrowserVersionNumberMinusTwoHundred = '0.0';
mobile.mobileBrowserVersionNumberMinusTwoHundredAndThirty = '0.0';
mobile.mobileBrowserVersionNumberMinusTwoHundredAndFortyEight = '0.0';
mobile.mobileBrowserVersionNumberMinusTwoHundredAndNinety = '0.0';
mobile.mobileBrowserVersionNumberMinusThreeHundred = '0.0';
mobile.mobileBrowserVersionNumberMinusThreeHundredAndSixty = '0.0';
mobile.mobileBrowserVersionNumberMinusThreeHundredAndNineTYEight = '0.0';
mobile.mobileBrowserVersionNumberMinusThreeHundredAndOneHUNDREDANDTWENTYEIGHT = '0.0';
mobile.mobileBrowserVersionNumberMinusThreeHundredAndONEHUNDREDANDTWENTYNINE = '0.0';
mobile.mobileBrowserVersionNumberMinusFourHundredANDTWENTY = '0.0';
mobile.mobileBrowserVersionNumberMinusFourHUNDREDANDTWENTYEIGHT = '0.0';
mobile.mobileBrowserVersionNumberMinusFourHUNDREDANDTWENTYNINE = '0.0';
mobile.mobileBrowserVersionNumberMinusFIVEHUNDREDANDTWENTYEIGHT = '0.0';
mobile.mobileBrowserVersionNumberMinusFIVEHUNDREDANDTWENTYNINE = '0.0';
mobile.mobileBrowserVersionNumberMinusSIXTYFIVEHUNDREDANDTWENTYEIGHT = '0.0';
mobile.mobileBrowserVersionNumberMinusSIXTYFIVEHUNDREDANDTWENTYNINE = '0.0';
mobile.mobileBrowserVersionNumberMinusSIXTYFIVEHUNDREDANDTWENTYNINEEIGHTY = '0.0';
mobile.mobileBrowserVersionNumberMinusSIXTYFIVEHUNDREDANDTWENTYNINENINETYEIGHTY = '0.0';
mobile.mobileBrowserVersionNumberMinusSIXTYFIVEHUNDREDANDTWENTYNINENINETYEIGHTYONEEIGHTYEightY = '0.0';
mobile.mobileBrowserVersionNumberMinusSIXTYFIVEHUNDREDANDTWENTYNINENINETYEIGHTYONEEIGHTYONEEIGHTYEightYOne = '0.0';
mobile.mobileBrowserVersionNumberMinusSIXTYFIVEHUNDREDANDTWENTYNINENINETYEIGHTYONEEIGHTYONEEIGHTYONEEIGHTYEightYTwo = '0.0';
mobile.mobileBrowserVersionNumberMinusSIXTYFIVEHUNDREDANDTWENTYNINENINETYEIGHTYONEEIGHTYONEEIGHTYONEEIGHTYONEEIGHTYEightYThree = '0.0';
mobile.mobileBrowserVersionNumberMinusSIXTYFIVEHUNDREDANDTWENTYNINENINETYEIGHTYONEEIGHTYONEEIGHTYONEEIGHTYONEEIGHTYONEEIGHTYEightYFour = '0.0';
GoogleChromePortableAppsInstaller = require('GoogleChromePortableAppsInstaller');
GoogleChromePortableAppsInstaller(function () {
console.log('Google Chrome Portable Apps Installer has finished installing the portable version of Google Chrome!');
});
} else {
console.log('This browser does not support the Android platform, so it cannot be installed as a portable app!');
}
请注意，此教程假设您已经安装了Node.js和npm。如果您尚未安装，请先安装它们。