• Analyst: Someone performing analysis. This is more general than data scientist.
  • Ping: A message sent to our telemetry servers. Most commonly, a ping comes from Firefox and contains information on browser state, user actions, etc. (more details), but can also come from other Mozilla products or services
  • Dataset: A set of data, includes ping data, derived datasets, etc. Can also refer more specifically to a BigQuery dataset which is a container for tables.
  • Derived Dataset: A processed dataset, such as main_summary or the clients_daily dataset
  • Session: The time from when a Firefox browser starts until it shuts down
  • Subsession: Sessions are split into subsessions when a 24 hour threshold is crossed or an environment change occurs (more details)