Puppeteer

Puppeteer is developed by Google and comes bundled with a compatible version of Chrome. The library can be installed with npm install puppeteer. Puppeteer runs in headless mode (without a visible browser window) by default but can be configured to display a browser window. Starting with version 23, Puppeteer expanded to support Firefox, making it a key tool for cross-browser automation. Common use cases include extracting data from JavaScript-rendered pages and SPAs, running end-to-end UI tests and form submissions, and capturing screenshots or converting pages to PDF. It also allows modifying HTTP requests and responses for mocking and testing, and measuring page load times and performance metrics.