Front-end observability best practices with Faro

1. Collecting #

The essentials, cleanly.

Principles #

• Application name, version and environment always set.
• Default web instrumentations + fetch traces to your APIs.
• Source maps available to the receiver, not necessarily public.
• Business events on key journey steps (not on every click).
• Session sampling on high-traffic sites.

2. Protecting #

Receiver and data.

Security and GDPR #

• CORS limited to your domains, API key, rate limiting in front of the receiver.
• No direct personal data; URLs cleaned by beforeSend.
• Collection conditional on consent if it is not strictly necessary.
• Short retention in Loki.

3. Using the data #

Indicators that guide decisions.

Rituals #

• Web Vitals p75 per page and per version in each front-end team's dashboard.
• Alert on rising exceptions after a deployment.
• Monthly review of pages rated « poor » by Core Web Vitals.
• User experience SLO (for example 75% of visits with an LCP < 2.5 s).

Reference diagram and quick check #

Checklist.

Checklist #

1. SDK initialized with version and environment
2. Secured Alloy receiver
3. Logs to Loki, traces to Tempo
4. traceparent propagation allowed by the APIs
5. Web Vitals and errors dashboard
6. Privacy policy up to date