Updated May 2026

How Lighthouse Monitor works

Run lab measurements to detect performance, accessibility and experience regressions.

Run a measurement

Open Lighthouse Monitor from a project and choose the device. QLAC runs a lab execution and stores the result in the project history.

Results are interpreted with alerts, recommendations and reports so the measurement becomes actionable.

Lighthouse monitor view with Mobile and Desktop metrics.

Measurement usage

  • Mobile consumes 1 measurement.
  • Desktop consumes 1 measurement.
  • Mobile + Desktop consumes 2 measurements because they are separate runs.
  • Quotas reset according to your plan cycle.

Reading variations