でプロキシを使用します。 Playwright

 const playwright = require('@playwright/test');
 const launchOptions = {
     proxy: {
         server: 'proxy.froxy.com:9000',
         username: 'login',
         password: 'password'
     }
 };
 (async () => {
     const defaultBrowser = await playwright['chromium'].launch({});
     const context = await defaultBrowser.newContext();
     const page = await context.newPage();
     await page.goto('https://froxy.com/api/detect-ip');
     console.log('chromium without proxy:', await page.textContent("*"));
     await defaultBrowser.close();

     for (const browserType of ['chromium', 'firefox', 'webkit']) {
         const browser = await playwright[browserType].launch(launchOptions);
         const context = await browser.newContext();
         const page = await context.newPage();
         try {
             await page.goto('https://froxy.com/api/detect-ip');
             console.log(`${browserType} with proxy:`, await page.textContent("*"));
         } catch (e) {
             console.log(e);
         }
         await browser.close();
     }
 })();