BigQuery

Query Mozilla telemetry data directly using the bq CLI.

Prerequisites

• gcloud and bq CLI installed (brew install google-cloud-sdk)
• Authenticated: gcloud auth login with a Mozilla account
• Billing project set: queries run against a project you have bigquery.jobs.create on
• (Optional but highly recommended) mozdata-claude-plugin — provides Glean Dictionary MCP for metric/ping discovery, making it much easier to find the right tables and columns

Authentication

# Check current account
gcloud config get-value account

# Re-authenticate if needed
gcloud auth login