faisalman/ua-parser-js

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

Mobile_Detect is a lightweight PHP class for detecting mobile devices (including tablets). It uses the User-Agent string combined with specific HTTP headers to detect the mobile environment.

Automatic polyfill service.

Crawlee—A web scraping and browser automation library for Node.js to build reliable crawlers. In JavaScript and TypeScript. Extract data for AI, LLMs, RAG, or GPTs. Download HTML, PDF, JPG, PNG, and other files from websites. Works with Puppeteer, Playwright, Cheerio, JSDOM, and raw HTTP. Both headful and headless mode. With proxy rotation.

🦔 Share target browsers between different front-end tools, like Autoprefixer, Stylelint and babel-preset-env

JavaScript API for Chrome and Firefox

Browser automation CLI for AI agents

Stealth headless browser for AI agents — bypass Cloudflare, bot detection, and anti-scraping. Drop-in Puppeteer/Playwright replacement.