Performance/Telemetry

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Telemetry allows developers to receive aggregate data of browser health in the field (docs).

The following statistics are currently gathered:


about:memory stats

  • Memory:heap-used/js/gc-heap (KB)
  • Memory:heap-used/layout/all (KB)
  • Memory:mapped/heap/used (KB)

Latency stats:

  • nsCycleCollector::Collect (ms)

Telemetry self-diagnostics:

  • telemetry.ping (ms)
  • telemetry.success (No, Yes)