Browser: Application and process management, permissions
Emulation: Emulation of different environments, throttling,
document scaling factors, and various overrides.
Network: Tracking page network activities, information about
HTTP, file, data and other requests and responses, their headers,
bodies, timing, &c.
Performance: Metrics collection.
Security: Tracking of security state changes and enables
security overrides to be installed.
Target: Target discovery and attachment, incoming command
request multiplexing and despatching.