{"domain":"sitespeed.io","status":"valid","tier":"listed","authority":51,"verified":false,"title":"sitespeed.io and Browsertime","summary":"sitespeed.io is an open source tool that measures the web performance of pages and user journeys in real browsers (Chrome, Firefox, Edge, Safari, and Chrome and Safari on mobile phones). Browsertime is the engine inside sitespeed.io that drives the browser and collects the metrics, and it can also run on its own. Both are Node.js command line tools (Node.js 22 or later) and are also shipped as Docker containers. Test scripts are ES modules that get a `context` and a `commands` object, and they r","llms_txt":"https://www.sitespeed.io/llms.txt","llms_full_txt":null,"last_checked":"2026-10-20T09:50:38.168Z","agent_terms":null,"categories":["developer-tools"],"capabilities":[],"inferred_tags":[],"audience":null,"agent_uses":[],"language":null,"platform_generated":null,"agent_summary":null,"llms_txt_cached":"https://agentwebmap.com/v1/domain/sitespeed.io/llms.txt"}