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Lighthouse 11 and the new Core Web Vitals: what changes for optimisers

04 September 20232 min read

PWA score gone, INP replacing FID, accessibility tightened. A small revolution in our audit reports.

In late August Google released Lighthouse 11 with a notable change: the PWA score is gone, replaced by targeted audits on individual PWA requirements.

Report shifts

The four classic panels remain: Performance, Accessibility, Best Practices, SEO. The cumulative PWA score is gone, replaced by standalone checks on manifest, service worker, installability.

INP (Interaction to Next Paint) enters lab metrics and from March 2024 is the official Chrome UX Report metric. For today's audits, INP does not drive pass/fail yet but shapes the overall view: if Lighthouse warns on long tasks, time to look.

Tighter accessibility

Lighthouse 11 introduces sharper checks on aria-*, contrast across overlapping elements, and landmark semantics. Result: sites that scored 95+ now score 85-90. They did not get worse — the check did.

What we are changing

In our audit reports we add a dedicated INP-readiness chapter with field measurement via Web Vitals JS. Lab alone is not enough — INP is mostly code that never ran on the real user's device.