Executive Summary (3–5 bullets)
* Agentic + browser automation is now a full stack, not a single library: LLM planning, browser control (Playwright/Selenium), anti-bot defenses (proxies/fingerprints), and observability all matter.
* Open-source frameworks (Browser Use, Agentic Browser, Crawl4AI, Crawlee-Python, LangGraph/CrewAI) maximize flexibility and cost control, but you must build