2.5.0

New Contributors!

• New contributors brought huge contributions of all-new audits, Chrome-launching improvements, and more complete documentation. Thanks to @mikecardwell, @rviscomi, @siddharthkp, @thisizkp, @rootulp, @kdzwinel, @LCartwright, @siteriaitaliana, @vinamratasingal, @alanyin0322, and @tkadlec!

New audits

• image-aspect-ratio best practice audit (#3084)
• time-to-first-byte perf audit (last fixes and now enabled) (#2231)
• errors-in-console best practice audit (#2836)
• no-vulnerable-libraries best practice audit (#2372)

New audits in full-config

• unused-javascript coverage audit (#3085)

New audits in new SEO config (#2999)

• meta-description SEO audit (#3227)
• http-status-code SEO audit (#3311)

FastMode

• add predictive-perf shell and base audit (#2720, #3189)
• add network estimation (#3187, cf5638d)
• add CPU estimation (#3162, 18837da, 5b459a1)

Core

• update unused-css-rules audit to support new coverage format (full-config only) (#2518)
• perf: use Audits.getEncodedResponse in optimized-images audit (#3087)
• don't wait for Page.navigate to resolve to listen for page load (#3413)
• include v8.execute trace event category (ab6aabd)

Report

• clarify wording of category descriptions (#3000)
• add a linked-text type to details renderer (#3165)
• fix: tame greedy markdown-link regex (#3312)
• fix: prevent \u2028 and \u2029 from breaking the report (#3442)
• improve descriptions for a11y audits (#3474)

Testing

• smokehouse: adjust unused-css-rules audit expectations (#3036)
• bundlesize: fix reporting in github UI (ede05c0, #3392)
• smokehouse: add basic smoke test for SEO audits (#3267)
• travis: unset _JAVA_OPTIONS for DevTools' compile_frontend.py test (#3354)
• eslint: enable comma-dangle rule, fix all new errors (#3324)
• smokehouse: add time-to-first-byte smoke test (#3310)

Docs

• import audit glossary from SEO doc (#3207)
• add advanced throttling guide (#3205)
• readme: reduce minimum Chrome version to current stable (#3287, 5382f37)
• readme: add explanation for Lighthouse Integrations section (#3418)
  contributing.md: fix grammatical errors (#3419)

CLI

• add blockedUrlPatterns support to CLI (#3125)
• adopt yargsParser directly for chromeFlags parsing (#3408)

Chrome-launcher

chrome-launcher has moved to a standalone npm package

• docs: add changelog (#2987)
• improve SIGINT handling (#2959)
• mute audio (#3028)
• rev to 0.6.0 (ec38bcd, 970d3ca, e9d569c, 5e9a3ab)
• handle errors inside spawnPromise (#2939)
• switch to using standalone package (#3410)

Misc

• apply small license header to remaining files (#3309)
• fix: remove redundant lighthouse-logger/ from npm package (#3411)
• remove old perfX code (#3431)
• update plots-config to use newer quiet parameters (#3464)
• collect even malformed error messages in extension (#3473)

Deps

• upgrade bundlesize to 0.13.2 (#3122)
• upgrade axe-core to 2.4.1 (#3284, #3320)
• upgrade ws to 1.1.2 (2d2206b)
• add yargs-parser at 7.0.0 (#3477, #3478)

---

Full Changelog