The **browser‑manifest** package defines a lightweight, informal schema for describing a browser’s identity (name, version, platform, title) together with the features it wants (e.g., tunnel, secure env) and supports (e.g., headless, concurrency). It provides a small Node API that validates, normalizes, and augments such manifests, enabling tools like Airtap and other test runners to reliably match and configure browsers across platforms. Intended for developers building automated testing, CI pipelines, or any tooling that needs a consistent way to represent and query browser capabilities.