Our cloud browsers need to do three things at once: start quickly, remain isolated, and be cheap. That is why we rebuilt Browser Use Cloud, so a new session starts in under a second and costs $0.02 per browser hour, down from $0.06. This is harder than it sounds. A browser has Chromium, a filesystem, cookies, cache, proxy settings, downloads, and sometimes a logged-in customer session. If one browser can read another browser's state, it creates a security problem. The normal answer is a virtual ...