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Cloudflare built a browser for AI agents. It uses 7x less memory than Chromium and runs entirely on Workers.

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TL;DR

Cloudflare launched Kitesurf, an agent-first browser on Workers. Uses 3-7x less CPU/memory than Chromium. Passes 215K+ WPT tests. Built in Rust/Wasm in 12 weeks. Free in beta via Browser Run. Will be open sourced.

Cloudflare built a browser from scratch for AI agents and launched it today as a free beta inside its Browser Run product. Kitesurf runs entirely on Cloudflare Workers, uses Rust compiled to WebAssembly, and strips out everything a human browser needs but an agent does not: tabs, extensions, themes, pixel-perfect rendering, and 60-fps scrolling. What remains is a lightweight engine optimised for the things agents actually care about, structured content extraction, screenshots, and isolation between sessions.

The performance numbers are the headline. On a 14-URL test corpus, Kitesurf used 3.1x less CPU for screenshots and 3.8x less for HTML extraction compared to Chromium. Memory consumption was 4.7x lower for screenshots and 7x lower for HTML...

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'Part of the motive was making the player feel immersed in the experience and exposed' — Rebellion says '90s cassette futurism' inspired Alien Deathstorm with an engineer protagonist who 'felt like a natural fit'

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