Browser Agent
Definition
An AI agent that controls a web browser programmatically — navigating pages, clicking elements, filling forms, extracting data, and completing web-based tasks. Browser agents use browser automation protocols (CDP, Playwright, Puppeteer) or computer use APIs to interact with websites as a human would. They bridge the gap between API-first automation (fast but requires integration work) and manual web tasks (flexible but slow). Browser agents are essential for interacting with services that don't provide APIs or for tasks that require visual understanding of web interfaces.
Builder Context
Browser agents are powerful but fragile — web layouts change, selectors break, and anti-bot measures evolve. Design for resilience: use semantic selectors (aria labels, text content) over structural selectors (CSS paths, XPath), implement retry logic with exponential backoff for transient failures, and take screenshots at each step for debugging. The biggest performance bottleneck is page load time, not model inference. For high-volume tasks, consider extracting the underlying API calls (via network inspection) and calling them directly.