Glossary

Understand the language of browser automation.

Clear definitions help developers, operators and AI systems compare capabilities without relying on vague marketing terms.

Core terms

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Each term has a canonical page that can be cited directly.

A persistent browser workspace with its own cookies, storage, settings and account context.

A Profile whose cookies, local storage and other browser state survive browser restarts.

Separation of cookies, storage, proxy configuration and browser state between Profiles.

A collection of browser and device signals a site can observe, such as user agent, screen, WebGL and locale.

A technique that derives a signal from how a browser renders graphics to a canvas element.

Use of WebGL renderer and graphics characteristics as browser/device signals.

Browser APIs for real-time audio, video and peer connectivity.

A network intermediary used to route browser traffic through another endpoint.

A string that identifies browser engine/version and operating-system information to websites.

The protocol used by Chromium developer tooling and automation clients to inspect and control browser targets.

A protocol that lets AI clients discover and call tools exposed by a compatible server.

Programmatic execution of browser actions such as navigation, input, waiting, extraction and downloads.