Lighthouse 13.3 introduces agentic browsing audits, and we've added quick tests for one off analysis.
Lighthouse's new agentic browsing category
A new Lighthouse category was introduced in version 13.3. This new category runs several checks to see how AI agents can interact with your website:
- That the website accessibility tree is well-formed
- Whether content shifts after rendering
- Correct WebMCP implementation
- llms.txt guidelines
Although the category is still in its early stages, you can now review the new audits for your pages in the Lighthouse tab.
Quick tests
The new quick tests feature allows you to run a one-off test without setting up continuous monitoring. Simply add the URL, device configuration, and test location for a faster insight.
Results can be shared via a link, with no need for a DebugBear account to view them. You can also access previous quick tests from this tab.
AI agent prompts
We've begun adding AI prompts in the recommendations tab. These are available for some audits currently, such as "Lazy load offscreen images".
The prompt contains key information your AI agent needs to fix issues in the code.
Custom DNS mappings
We've added custom DNS mappings based on customer feedback. The DNS override lets you load your website using a different server IP while keeping the same URL. This is useful for testing staging environments with a production hostname, bypassing a CDN to measure origin performance, or validating a migration before updating public DNS records.
You'll find this in advanced settings during the synthetic monitoring setup.
Dashboard wide filters for custom dashboards
Following on from last month's release of custom dashboards, we've made some improvements to filtering. You can now add filters that apply to all charts on your dashboard, and also save these as the dashboard default.
New Articles
- Can A Content Delivery Network Boost Website SEO?: In this article we look at the SEO benefits of using a CDN, as well as setting up Cloudflare.
- Google Lighthouse Has A New Agentic Browsing Category: An overview on each new audit in Lighthouse's agentic browsing category.
- Smarter Website Caching With No-Vary-Search: Learn how the new No-Vary-Search HTTP header improves browser and CDN caching by controlling which query parameters affect cache keys.
- How To Set Up Performance Alerts On Your Website: A complete guide on what performance alerts are and how to set up a winning alert strategy.