Use a Browser Extension like Tampermonkey + Custom Script

You can write a userscript using Tampermonkey to intercept network responses.

Steps:

Install Tampermonkey extension in Chrome or Firefox.

Write a script to hook into XMLHttpRequest or fetch calls.

Log or download the response data.

Option 2: Use Puppeteer (Headless Browser Automation with Node.js)

If you want more control or automation outside the browser (like in a script), use Puppeteer:

What it does:

Launches a headless browser

Monitors all network requests/responses

Extracts response bodies