Cloudflare shipped Worker Previews today, and the headline is easy to state. Every git branch gets its own running Worker, with its own URL, its own config, its own logs, its own traces. You run npx wrangler preview, and the branch you’re sitting on becomes something you can open in a browser and click through. Cloudflare says you can run hundreds of them side by side without them touching each other or production.

Cloudflare shipped Kitesurf on August 6, a web browser it wrote from scratch for AI agents. It runs entirely inside Workers. No Chromium underneath, no container, no headless Chrome process idling in a warm pool waiting for something to do.

The problem it targets is a billing problem. Agents need browsers to do real work, and Chromium is the only serious option, but Chromium was built for a person sitting in front of a screen. Tabs, extensions, device sync, sixty frames a second of smooth scrolling. An agent does not care about any of that. What it cares about is token count, context window, and what the session costs. Handing every agent its own Chromium instance prices most agentic applications out of the web entirely, and leaves browsing to the expensive models that can afford it.