v9.6.1

Full Changelog

We expect this release to ship in the DevTools of Chrome 103, and to PageSpeed Insights within 2 weeks.

Core

• fps: run at the end of timespan/snapshot (#13989)
• responsiveness: add element screenshot to INP diagnostic (#13984)
• responsiveness: add better INP fallback for old Chrome versions (#13985)

Report

• devtools: use absolute positioning for overlay (#13988)

Tests

• use origin-agent-cluster to actually test oopifs (#13777)

v9.6.0

Full Changelog

We expect this release to ship in the DevTools of Chrome 103, and to PageSpeed Insights within 2 weeks.

New Audits

• The new performance metric Interaction to Next Paint (INP) assesses responsiveness by measuring the latency of interactions throughout the page lifecycle. INP can be measured using Lighthouse timespan mode accessible through user flows or the new DevTools panel. (#13917)

Core

• extract BootupTime task summary methods (#13971)
• css-usage: fetch stylesheet contents immediately after discovery (#13887)
• installability-errors: add url scheme error (#13846)
• installable-manifest: always run InstallabilityErrors in legacy mode (#13622)
• responsiveness: use new EventTiming trace event format (#13979)
• responsiveness: use raw trace event (#13970)
• trace: use tracing-started event for frame tree info (#13913)
• trace: add PrePaint event, renamed from UpdateLayerTree (#13950)
• trace-processor: ignore navigationStart with falsy document url (#13848)
• resolve redirected script records (#13751)
• deprecations: drop compat for ConsoleMessages (#13893)
• deprecations: hard-code english strings (#13961)

Report

• hide disclaimer text in timespan (#13931)
• psi: stub out locale swapping (#13885)
• report: render notApplicable metrics with double dash (#13981)

Deps

• upgrade third-party-web (#13873)
• update to third-party-web 0.15.0 (#13804)
• axe-core: upgrade to 4.4.1 (#13814)
• js-library-detector: upgrade to 6.5.0 (#13969)
• lighthouse-stack-packs: upgrade to 1.8.1 (#13862)
• snyk: update snyk snapshot (#13823, #13880)
• lodash: use individual lodash modules to reduce bundle size (#13914)
• puppeteer: upgrade to 13.7.0 (#13657)

Tests

• upgrade devtools web tests deps, use python3 (#13782)
• update create-test-trace utility (#13942)
• rebaseline webtests (#13963)
• smoke: remove old chrome version checks (#13903)
• smoke: support full chrome version for pruning (#13896)

v9.5.0

Full Changelog

We expect this release to ship in the DevTools of Chrome 101, and to PageSpeed Insights within 2 weeks.

New Contributors

Thanks to our new contributor 👽🐷🐰🐯🐻!

• Marc Hassan @mhassan1

Core

• full-page-screenshot: leave emulated width unchanged (#13643)
• inspector-issues: update sameSiteCookie to cookie (#13708)
• script-treemap-data: correct value for size (#13716)
• lighthouse-logger: convert to ES modules (#13720)

⛏️👷 Fraggle Rock

Support for auditing user flows (#11313)

• separate audit phase for flows (#13623)
• use frame url in gather context (#13699)
• add logLevel to config context (#13681)
• user-flow: audit flow from artifacts json (#13715)

Report

• fix timespan/snapshot sticky header (#13732)

Deps

• lodash: replace lodash per-method packages with full lodash (#13695)
• snyk: update snyk snapshot (#13731 #13712)

Clients

• convert devtools and lightrider entries to ES modules (#13722)

Tests

• add more cases for oopif smoke test (#13705)
• devtools: add yarn install timeout (#13717)
• devtools: update Lighthouse sniffer for smokes (#13693)
• devtools: navigation web test (#13673)
• smoke: enable more devtools smoke tests (#13624)
• smoke: add _excludes and _runner (#13707)

Misc

• support --chrome-flags in run devtools script (#13625)

v9.4.0

Full Changelog

We expect this release to ship in the DevTools of Chrome 100, and to PageSpeed Insights within 2 weeks.

Notable Changes

• Allow auditing of navigations triggered by user interactions in user flows. See our user flow docs for more info. (#13496)

Core

• a11y: change link in category description to web.dev (#13638)
• full-page-screenshot: wait for doubleraf, network quiet (#13663)
• hreflang: remove eval, import axe valid-langs.js directly (#13385)
• inputs: refactor form-elements gatherer (#13662, #13671)
• page-functions: set style in getOuterHTMLSnippet without violating CSP (#13636)
• runner: independent gather and audit functions (#13569)
• uses-long-cache-ttl: ignore stale-while-revalidate (#13612)

Report

• add options onPrintOverride and onSaveFileOverride (#13529)
• add options disableFireworks and disableDarkMode (#13649)
• add onViewTrace to renderer options (#13528)
• remove pausing fireworks on click (#13650)
• fix fireworks (#13635)

Deps

• sentry: move from raven to @sentry/node (#9325)
• snyk: update snyk snapshot (#13669, #13644, #13616)

Tests

• use simpler assertion in report-renderer-axe-test.js (#13658)
• fix single node a11y tests (#13626)
• devtools: sync (#13656)
• devtools: update report resource names (#13615)
• smoke: test array _includes and lhr.timing (#13619)

Misc

• temporarily remove brendan from triage rotation (#13618)

v9.3.1

Full Changelog

Report

• disable fireworks with flag (#13610)

v9.3.0

Full Changelog

We expect this release to ship in the DevTools of Chrome 100, and to PageSpeed Insights within 2 weeks.

Notable Changes

• Fixed a major bug introduced in 9.0 that broke --cli-flags-path #13589

Core

• preload-lcp-image: enable audit (#13599)
• ensure good and average scores start exactly at control points (#13559)
• fr: don't throw on unknown --only-categories value (#13499)
• inspector-issues: collect all issue types (#13462, #13603, #13595)
• object-alt: remove md syntax around "alt" (#13517)
• runner: asset manager helper (#13519)

CLI

• remove update-notifier (#13588)
• asset-saver: end devtoolsLog with a newline (#13566)

Report

• allow client to configure how save-html is implemented (#13518)

Deps

• update various runtime deps (#13483)
• update various devDeps (#13485)
• update robots-parser to latest (#13554)
• update transitive deps to quiet vulnerability alerts (#13538)
• lighthouse-stack-packs: upgrade to 1.7.0 (#13604)
• snyk: update snyk snapshot (#13498, #13598)
• yargs: upgrade to 17.3.1 (#13590)
• yargs-parser: upgrade to 21.0.0 (#13597)

Clients

• use minimal 'url' polyfil instead of url-shim (#13545)
• devtools: add FR runners to DevTools entry (#13593)

I18n

• import (#13602)

Docs

• update devtools panel throttling details (#13504)

Tests

• add snapshot tests for cli-flags.js (#13596)
• tweak some CI job names for clarity (#13549)
• split devtools ci into build, web-tests and smoke jobs (#13546)
• more targeted caching for devtools build (#13540)
• run most smoke tests on devtools (#13456)
• clean up and add comments to cdt layout test scripts (#13471)
• devtools: ensure WebSQL table is populated (#13579)

v9.2.0

Full Changelog

We expect this release to ship in the DevTools of Chrome 99, and to PageSpeed Insights within 2 weeks.

Notable Changes

• move no-unload-listeners to perf category (#13497)

Core

• font-size: fix CSS selector regex (#13455)
• fcp: handle negative request endTime (#13452)
• legacy-javascript: update polyfilling, drop some signals (#13482, #13442)
• cache fetch to avoid bad polyfills (#13476)
• check equality of computed artifacts using dependency keys (#13430)

⛏️👷 Fraggle Rock

Support for auditing user flows (#11313)

• compute timespan saving with observed throughput (#13478)
• option to skip about:blank jumps (#13375)

Report

• psi: update styles for tighter fit in narrow viewports (#13355)

Deps

• bump eslint and related items (#13484)
• axe-core: upgrade to 4.3.5 (#13441)

Tests

• smoke: fix chromestatus url (#13475)
• split smoke tests into one test per file (#13461)
• fix devtools build command (#13457)
• move sharding higher so smokehouse-bundle can also shard (#13387)
• port axe test to pptr (#13450)

Misc

• build: build test flow report to same path as sample-reports (#13324)
• treemap: add lang to html tag (#13454)

v9.1.0

Full Changelog

We expect this release to ship in the DevTools of Chrome 98, and to PageSpeed Insights within 2 weeks.

New Contributors

Thanks to our new contributors 👽🐷🐰🐯🐻!

• @whitep4nth3r
• Adam Read @adamread

Notable Changes

• If using Next.js, you will now see advice specific to it in some audits (#13424)

Core

• canonical: remove cross-origin check (#13412)
• add original location to most usages of source-location (#13393)
• mindfully order properties in the lhr (#13418)
• ensure log-normal score is always in correct range (#13392)
• installable-manifest: pipeline-restarted check (#13365)

Report

• remove margin when saving html in standalone report (#13409)
• consistent red display text (#13391)
• treemap: correct percentages when 0 bytes JS (#13382)

⛏️👷 Fraggle Rock

Support for auditing user flows (#11313)

• rebaseline sample (#13358)
• report api (#13374)

Deps

• remove browserify (#13417)
• update to typescript 4.5 (#13399)
• snyk: update snyk snapshot (#13388)

Clients

• devtools: remove report.css (#13377)
• viewer: add support for flow reports (#13260)

I18n

• import (#13427)

Docs

• example to save flow as json (#13415)
• throttling: clarify throttle npm name (#13371)

Tests

• fix undefined HTMLInputElement in bundle-test (#13421)
• make inline-fs-test not reliant on cwd (#13420)
• increase timeout for axe test (#13386)

Misc

• build: replace browserify with rollup (#13416, #13406, #13407, #13408)
• build: prevent over optimization of computeBenchmarkIndex (#13366)
• treemap: remove postMessage. refactor options input (#13356)

v9.0.0

Full Changelog

We expect this release to ship in the DevTools of Chrome 98. It is already live in the new PageSpeed Insights.

See the What's new in Lighthouse 9.0 blog post. Continue for the changelog.

New Contributors

Thanks to our new contributors 👽🐷🐰🐯🐻!

• Sergii Bondarenko @BR0kEN-
• Prerana Nawar @prerana1821

Notable Changes

• [BREAKING] move to minimum Node 14 (#13243)
• a11y: add relatedNodes to accessibility audits (#13193)

Removed Audits

• [BREAKING] appcache-manifest: remove audit (#13287)
• [BREAKING] external-anchors-use-rel-noopener: remove audit (#13298)
• [BREAKING] remove the redirect pass and redirects-http audit (#12643)

Preview: Audit User Flows

Lighthouse now offers auditing user flows, scripted with Puppeteer, via the Node CLI. This means you can now audit a page beyond its initial load. See the Lighthouse user flows blog post for more.

Core

• fix launching chrome in node 17 (#13301)
• reduce image hotlinking in the report (#13185)
• emulation: set client-hints metadata when spoofing the UA (#13341)
• emulation: bump chrome version to m98 (#13340)
• config: use abbreviation for pwa category title (#13270)
• deprecations: use inspector issues (#13342)
• avoid fatal errors when collecting base artifacts (#13312)
• [BREAKING] errors-in-console: remove url property from items (#13286)
• [BREAKING] image-size-responsive: remove elidedUrl, elide url property instead (#13226)
• [BREAKING] image-elements: remove mimeType from artifact (#13265)

Report

• introduce the new report api, add dom.rootEl (#13277, #13279, #13361)
• make denser. changes to typography, group descriptions, more (#13249)
• display final screenshot prominently (#13123)
• redesign runtime settings (#13125, #13350)
• help-dialog: remove timespan SEO (#13354)
• order metrics by row (#13328)
• sort audits by weight (#13053)
• translate newly added report strings (#13308)
• [BREAKING] group perf audits by details type. change the meaning of an audit whose group is not defined–before no group implied an audit would not be renderered, but now an explicit hidden group is used (#13241, #13310)
• [BREAKING] pwa: remove renderScoreGauge, replaced with renderCategoryScore (#13269)

⛏️👷 Fraggle Rock

Support for auditing user flows (#11313)

• handle 0 throughput in timespan (#13323)
• clone default categories to avoid modification (#13337)
• add timespan support to h2 (#12814)
• report: remove smooth scrolling (#13317)
• report: network throttling settings (#13305)
• report: use filmstrip thumbnail in navigation (#13283)
• report: fix report anchors (#13233)
• report: full page screenshot renderer (#13276)
• report: category tooltip highest impact (#13230)
• report: import lhr strings (#13215)
• report: i18n formatter (#13190)
• report: mock styles (#13220)

Deps

• bump lighthouse-plugin-publisher-ads (#13339)
• deps: update chrome-launcher to 0.15.0 (#13353)

Clients

• devtools: only use locales that have locale files to download (#13214)
• psi: retire prepareLabData, reuse standard report rendering (#13229)

I18n

• import (#13360)
• add better support for the default locale in bundles (#13211)

Tests

• eslint: add export rule (#13282)
• longer timeout for installability errors check (#13297)
• ignore .tmp directory in jest modules (#13285)
• add cdt folders to devtools test cache buster (#13268)
• update devtools default branch to 'main' (#13266)
• ci tests should include all files (#13235)
• report: throw on axe error (#13234)
• flow: puppeteer test (#13281)

Misc

• publish: include the report bundle in npm package (#13349)
• build: create inline-fs rollup plugin to replace brfs (#13232, #13240, #13248, #13272, #13275, #13278, #13280)
• build: use rollup to build lighthouse-core bundles (#12771)
• build: call close method on rollup builds (#13307)
• build: use prepack script to build report (#13261)
• build: do not assign runBundledLighthouse in devtools bundle (#13311)
• build: use cross platform sed for devtools script (#13242)
• preserve error stack when using promise timeout (#13333)
• support old devtools in yarn run-devtools (#13284)
• add report bundles to nightly build (#13222)
• rename lighthouse-treemap to treemap (#13246)
• rename lighthouse-viewer to viewer (#13247)
• simplify release process, run package-test in CI (#13212)
• add os to bug report template (#13245)
• proto: add throttling and throttling_method (#13309)
• revert missing bundle tests (#13289)
• fix typo (#13224)

v8.6.0

Full Changelog

We expect this release to ship in the DevTools of Chrome 97, and to PageSpeed Insights within 2 weeks.

New Contributors

Thanks to our new contributors 👽🐷🐰🐯🐻!

• meehawk @meehawk
• Edwin Gustafson @edwingustafson
• Yorkie Liu @yorkie

Core

• crawlable-anchors: ignore event listeners, validate url (#13105)
• full-page-screenshot: fix emulation reset (#13175)
• response-compression: add x-content-encoding-over-network (#13176)
• share localization between core and report (#13146)
• update cdt SourceMap to latest devtools frontend (#13095)
• stack-packs: simplify i18n filename lookup (#13133)

⛏️👷 Fraggle Rock

Support for auditing user flows (#11313)

• add UserFlow usability improvements (#13139)
• add supportedModes filter to categories (#13161)
• handle cached timespan records (#13181)
• add parity logging (#13114)
• animate timespan thumbnail (#13178)
• refine snapshot and timespan performance (#13184)
• topbar save button (#13109)
• elide step name (#13171)
• localized sample (#13143)
• timeline header (#13128)
• add help dialog to explain flows (#13159)
• collect i18n strings (#13152)

CLI

• add list-locales flag (#12983)
• always return correct version (#13130)

Report

• move logger styles into js (#13204)
• remove href from category score gauge (#13180)
• inject report/assets/styles.css via components.js (#13057)
• remove smooth scrolling css (#13102)
• add lh- prefix to remaining show class (#13203)
• handle gauge fragment links in script (#13186)

Clients

• psi: include global reports styles in legacy psi rendering (#13151)
• viewer: swap locale (#10148, #13192)
• viewer: remove devtools disclaimer (#13145)
• viewer: add body styles (#13144)
• viewer: upgrade to firebase 9 (#13115)
• viewer: use access token regardless of firebase auth (#13116)
• viewer: use new firebase credentials (#13110)

I18n

• import (#13206)

Docs

• correct the Node.js version base (#13099)
• add user flow docs (#13134)

Tests

• smoke: make specific assertions about deprecations (#13191)
• update deprecations smoke for M96 (#13179)
• make yarn unit run all available unit tests (#13148)
• centralize running of docs tests (#13150)
• split out axe test (#13142)

Misc

• convert lighthouse-core/scripts to ES modules (#13121)
• remove patrick from issue assigner (#13194)
• set predictable order for sample json timing entries (#13162)
• scripts: fix run-devtools sniffing, add error checking (#13163)
• ensure psi.espanol sample-report es en espanol (#13160)
• add notes about software versions in issue template (#13089)
• build: fix smokehouse bundle (#13135)
• build: fix vercel deployment by adopting stricter engines grammar (#13183)
• build: create rollup-plugins.js helper module (#13122)
• build: don't build flow if only --standalone is requested (#13124)