TL;DR
- New “agentic browsing” category added to default Lighthouse configuration.
- Core updates enhance agentic web audit descriptions and stability.
- Expected to ship in Chrome 150 DevTools and PageSpeed Insights soon.
Key Changes
New Feature: Agentic Browsing Category. Lighthouse v13.3.0, a minor update released on 2026-05-07, introduces a significant new “agentic browsing” category to its default configuration (#17002). This addition is specifically designed to assess the performance and security aspects of web applications that utilize agentic or AI-driven browsing patterns, providing new insights into how these advanced interactions impact user experience.
Core Updates for Agentic Web. Related core changes include adding descriptive links to category and audit descriptions for agentic-web (#16997). Furthermore, titles and descriptions for llms-txt have been adjusted, accompanied by new smoketests (#17005) to ensure accuracy and stability in reporting.
Maintenance & Stability. This release also includes general dependency upgrades (#17006), which contribute to overall tool stability and security. Test improvements include widening the byte efficiency wastedBytes range for ToT in smoke tests (#16996) and adding new webmcp smoketests (#16999), enhancing test coverage.
For a full list of changes, refer to the official changelog.
Impact for QA Teams
QA engineers should pay close attention to the new agentic browsing category, especially when testing AI-driven web applications or sites with complex, automated user flows. This update provides new metrics and insights crucial for evaluating the performance and security of such experiences. Integrating these new audit capabilities into existing workflows is essential for maintaining high quality. Staying current with Lighthouse updates is crucial for effective performance testing and ensuring web applications meet modern standards.
Availability
This version is expected to ship in Chrome 150 DevTools and arrive in PageSpeed Insights within two weeks.
