Full Changelog

We expect this release to ship in the DevTools of Chrome 150, and to PageSpeed Insights within 2 weeks.

New contributors

Thanks to our new contributors 👽🐷🐰🐯🐻!

• ducky-duke @ducky-duke
• Simon Zünd @szuend

New Audits

• webmcp-form-coverage: add audit for missing webmcp tool annotations (#16964)
• webmcp-registered-tools: add audit to list registered webmcp tools (#16959)
• webmcp-schema-validity: add audit to check WebMCP schema issues (#16973)

Core

• implement UKM Invalidate fallback for LCP (#16956)
• agentic: add new agentic browsing category (#16953)
• agentic_category: add disclaimer to category description (#16990)
• config: aggregate agent accessabilty audits (#16982)
• config: update llms.txt to refine validation logic (#16986)
• config: implement llms.txt check for AI agents (#16970)
• config: move specific accessibility audits to default config (#16966)
• config: enable and add new axe audits for agentic category (#16965)
• config: add accessibility audits to agentic-browsing-config (#16963)
• source-maps: guard against out-of-bounds sourceIndex (#16969)
• webmcp: adjust how webmcp audits handle lack of WebMCP support (#16987)

Report

• create agentic-browsing sample report (#16988)

Deps

• upgrade deps (#16992)
• upgrade web-features to 3.24.0 (#16977)
• upgrade trace_engine to 0.0.64 (#16955)

Docs

• release: fix heading style (#16989)
• release: update release docs and scripts (#16954)

Misc

• prepare devtools build for TS6 upgrade (#16968)
• build: include license.md in bundle (#16981)
• build: update devtools for agents bundle and tests (#16980)
• build: include agentic browsing in cd4a bundle (#16975)

Full Changelog

We expect this release to ship in the DevTools of Chrome 149, and to PageSpeed Insights within 2 weeks.

New contributors

Thanks to our new contributors 👽🐷🐰🐯🐻!

• Iaroslav Shvets @iaroslavshvets

New Audits

• baseline: implement baseline compatibility audit (#16904)

Core

• baseline: add baseline icons to baseline audit lighthouse report (#16927)
• baseline: add web-feature version to audit description (#16937)
• baseline: add baseline compatibility audit to default config (#16910)
• network: revert strict wrapping of network requests (#16949)
• trace: add WebDX feature usage trace category (#16899)

Deps

• upgrade deps (#16943)
• dependabot: less noisy PRs (#16919)

Clients

• build: include missing 3P notices in MCP bundle (#16917)

Docs

• fix jsdoc link (#16896)

Tests

• lantern trace data must now be downloaded manually (#16789)
• fix CI failures and modernize documentation links (#16939)
• refresh sample artifacts (#16916)
• fix smoke tests relying on mozilla.org (#16901)
• fix CI. execContext count, i18n ICU breakage, loud jsdom parse output (#16898)
• devtools: sync e2e tests from devtools-frontend (#16908)
• smoke: smoke tests for the mcp bundle (#16883)
• smokehouse: fix baseline config to use onlyAudits (#16931)

Misc

• fix TS7 compatibility issue (declare module syntax) (#16926)
• build: shim puppeteer-core in the mcp bundle (#16895)
• build: remove soft nav from mcp bundle (#16888)
• build: fix mcp bundle shims (#16882)
• build: generate third party notices file (#16887)

Fixes npm package publish of 13.0.2. Refer to https://github.com/GoogleChrome/lighthouse/releases/tag/v13.0.2 for actual changes.

We expect this release to ship in the DevTools of Chrome 146, and to PageSpeed Insights within 2 weeks.

Full Changelog
We expect this release to ship in the DevTools of Chrome 146 and to PageSpeed Insights within 2 weeks.

Core

• hreflang: update valid-langs.js (#16829)
• robots-txt: add Content-Signal directive (#16767)

Report

• fix focus in devtools, and in 3-dot menu (#16802)
• tooltip: fix tooltip positioning in devtools (#16844)

Docs

• readme: add FERU to services list (#16791)
• readme: add LightKeeper to the list of Web Perf services (#16830)

Tests

• align expected a11y contrast failure with reality (#16824)
• skip 'issueAdded types' (#16804)
• devtools: sync e2e (#16803)
• smoke: deflake devtools smoke tests (#16875)

Misc

• build: build-bundle to share esbuild-plugins (#16876)
• build: create a bundle for devtools-mcp (#16858)
• ci: disable nightly publish schedule (#16825)
• strings: fix i18n README typo (#16792)

Full Changelog

We expect this release to ship in the DevTools of Chrome 143, and to PageSpeed Insights within a week.

Core

• fix incorrect dpr used for responsive images advice (#16771)

Full Changelog

Release article

We expect this release to ship in the DevTools of Chrome 143, and to PageSpeed Insights within a week.

New contributors

Thanks to our new contributors 👽🐷🐰🐯🐻!

• Benjamin R Gibson @brgibson
• Leonardo Poletto @leopoletto

Notable Changes

• performance: remove audits replaced by performance insights (#16729)
• remove preload-fonts, uses-rel-preload audits (#16716)
• remove font-size audit (#16701)
• remove offscreen-images audit (#16748)
• remove no-document-write audit (#16750)
• remove uses-passive-event-listeners audit (#16751)
• remove third-party-facades audit (#16710)
• scoring: adjust a11y weights and document approach (#16624)

Core

• remove ResponseCompression artifact (#16755)
• remove OptimizedImages artifact (#16754)
• remove DOMStats artifact (#16753)
• remove CacheContents artifact (#16752)
• remove empty first-meaningful-paint audit (#16749)
• remove some unused computed artifacts (#16735)
• defer to trace engine for lcp-breakdown, ttfb (#16733)
• error on unknown category in onlyCategories (#16720)
• drop compat traces / devtoolsLogs artifacts (#16708)
• import json as modules (#16700)
• anchor-elements: don't consider ancestorListeners (#16731)
• dom-size-insight: add numericValue (#16741)
• emulation: always match host browser's version milestone (#16677)
• font-display-insight: disable entity sum for est. savings (#16746)
• image-delivery-insight: add node item for image (#16714)
• inspector-issues: remove empty arrays (#16736)
• legacy-javascript: update caniuse data (#16699)
• network-request: remove receiveHeadersStart M115 compat (#16738)
• server-response-time: defer to Document Latency insight (#16715)
• trace-elements: remove unused event types (#16734)
• trace-elements: handle shadow roots (#16718)

CLI

• improve description for form-factor flag (#16682)

Report

• add adornment to audit description when not scored (#13014)

Deps

• upgrade deps (#16760)
• remove parse-cache-control (#16747)
• upgrade trace_engine to 0.0.61 (#16745)
• upgrade @esbuild-kit/esm-loader to 2.6.5 (#16730)
• upgrade deps (#16724)
• upgrade trace_engine to 0.0.60 (#16723)
• remove es-main (#16697)
• bump chrome-launcher to 1.2.1 (#16696)
• upgrade testdouble, fix mock tests in Node 21+ (#16664)
• lighthouse-stack-packs: upgrade to 1.12.3 (#16727)

I18n

• import (#16759)

Tests

• update some comments (#16744)
• re-enable smoke test for lcp-breakdown-insight score (#16743)
• re-enable dom-size-insight node smoke test (#16742)
• enable smoke test for lcp lazy load in shadow tree (#16739)
• re-enable csp block smoke test, make less restrictive (#16728)
• re-enable startTimespan api test (#16703)
• devtools: sync e2e (#16694)
• server-response-time: enable lightrider test (#16737)
• viewer: re-enable test (#16740)

Misc

• replace dead link for insecure origins deprecation (#16711)
• upgrade typescript target to es2023 (#16316)
• fix core/scripts/legacy-javascript/examine-latest-run.js (#16706)
• update min supported node version to 22.19 (#16668)
• fix typos in a11y i18n doc comments (#16665)
• build: update devtools 3p readme, document debug build (#16695)
• proto: add ConfigSettings fields (#15616)
• structured-data: remove dead link (#16709)

Full Changelog

We expect this release to ship in the DevTools of Chrome 141, and to PageSpeed Insights within 2 weeks.

New contributors

Thanks to our new contributors 👽🐷🐰🐯🐻!

• uthem150 @uthem150
• Nirav Gondaliya @niravzxv

Core

• errors-in-console: truncate large errors (#16619)
• insights: passing score (not n/a) for empty results (#16639)
• non-composited-animations: separate custom CSS properties (#16627)

Report

• viewer: only disable save-gist button on successful save (#16618)

Deps

• upgrade deps (#16660)
• upgrade trace_engine to 0.0.59 (#16659)
• remove semver (#16655)
• upgrade tldts-icann (#16657)
• upgrade esbuild to 0.25.9 (#16652)
• upgrade / drop many dev deps (#16651)
• upgrade trace_engine to 0.0.58 (#16649)

I18n

• import (#16662)

Tests

• disable startTimespan api test (#16653)
• disable trusted-types-directive-present smoke test (#16620)
• smokehouse: log specific error message when missing tests path (#16648)

Misc

• use structuredClone instead of lodash cloneDeep (#16656)

Full Changelog

We expect this release to ship in the DevTools of Chrome 140, and to PageSpeed Insights within 2 weeks.

New contributors

Thanks to our new contributors 👽🐷🐰🐯🐻!

• Boluwatife Omosowon @bolu-tife
• Jonas Thelemann @dargmuesli

Core

• network-requests: add initiators to debugData (#16605)

I18n

• import (#16616)

Tests

• disable csp-block-all smoke test (#16598)

Misc

• revert json modules to fully support Node 20 (#16613)
• ci: clear devtools build cache (#16615)
• logger: bump to 2.0.2 (#16604)
• logger: update debug dep to v4 (#16601)
• treemap: fix sizes not showing for source map nodes (#16593)

Full Changelog

We expect this release to ship in the DevTools of Chrome 140, and to PageSpeed Insights within 1 week.

New Audits

• mitigate dom-based xss with trusted types (#16493)

Core

• tracehouse: fix OOM when computing attributable URLs (#16585)
• trusted-types-xss: add link to lighthouse docs (#16590)

Deps

• upgrade trace_engine to 0.0.57 (#16589)

Tests

• disable issues-mixed-content smoke test (#16586)
• add test for trace-engine-result (#16574)
• update expectations (#16580)
• devtools: avoid failure on Unknown VE Context (#16581)

Full Changelog

We expect this release to ship in the DevTools of Chrome 140, and to PageSpeed Insights within a week.

Core

• trace-engine-result: initialize SyntheticEventsManager (#16572)