Manifest position 519 · CrUX rank bucket 1000

https://www.yahoo.com

Coverage complete

Atomic coverage complete. The requested US URL geolocated to the Yahoo UK surface; findings apply to the observed UK portal, consent, Finance, Search, News article, and login templates.

Attempts

2 / 3

Judged checks

58 / 58

Blocked

Not run

This report has no published overall score. Blocked and not-run checks are not passes. A coverage-complete report means every check has a judged outcome; it does not mean every check passed.

All 58 atomic check outcomes

Principle / check	Status	Confidence	Evidence or reason
respect-user-preferences `respects-color-scheme`	issues	high	Dark preference matched but entry surfaces stayed light. F-001 medium: The main Yahoo and consent surfaces do not adapt to the requested dark theme.
respect-user-preferences `respects-reduced-motion`	issues	high	Seven 700ms animations remained running under reduce. F-002 medium: Yahoo Finance continues non-essential animation when reduced motion is requested.
respect-user-preferences `respects-contrast`	pass	high	Lighthouse contrast passed and controls/text remained visually distinct.
implement-natural-interactions `view-transitions`	issues	medium	Consent-to-home navigation is abrupt and no view-transition declarations were found. F-003 low: Navigation and state changes do not expose modern declarative transition or positioning cues.
implement-natural-interactions `scroll-driven-animations`	pass	medium	No scroll-linked visual effect or scroll animation was present, so no main-thread imitation was observed.
implement-natural-interactions `physical-gestures`	pass	medium	Sampled pages use native scrolling and ordinary controls without custom pointer gesture traps.
provide-guided-navigation `scroll-state-aware-chrome`	issues	medium	Long feed chrome has no observed scroll-state response or progress cue. F-003 low: Navigation and state changes do not expose modern declarative transition or positioning cues.
provide-guided-navigation `anchored-positioning`	issues	medium	Positioned UI was present but no anchor-positioning usage/fallback declarations were found. F-003 low: Navigation and state changes do not expose modern declarative transition or positioning cues.
provide-guided-navigation `directs-attention`	pass	high	Strong headline hierarchy, skip links, market strip, and visible state labels direct attention.
maximize-content-reduce-noise `no-intrusive-interruptions`	issues	high	Blocking consent overlay obscures all content on entry. F-004 high: A mandatory consent interstitial obscures the entire homepage and every article before content can be used.
maximize-content-reduce-noise `semantic-dismissible-primitives`	issues	high	Visible modal has zero dialog/popover elements. F-005 medium: The blocking consent experience is not represented by the native dialog or popover primitives.
maximize-content-reduce-noise `reduced-chrome`	pass	medium	Once content is visible, Finance uses a content-dense hierarchy with restrained chrome.
adapt-to-the-form-factor `responsive-no-horizontal-scroll`	pass	high	Both measured zero horizontal overflow with viewport metadata.
adapt-to-the-form-factor `component-level-responsiveness`	issues	medium	No container-query declarations were found for reused portal components. F-003 low: Navigation and state changes do not expose modern declarative transition or positioning cues.
adapt-to-the-form-factor `input-modality-aware`	pass	high	Target-size audit passed; sampled native links/buttons expose browser focus outlines and mobile controls are adequately sized.
support-core-task-success `clear-purpose-and-primary-action`	pass	high	Homepage/search/Finance communicate purpose with prominent search, headlines, and clear primary controls.
support-core-task-success `primary-flow-completion`	issues	high	Representative web search returned HTTP 500 instead of results. F-006 high: The primary web-search journey failed instead of returning results.
support-core-task-success `clear-system-state-and-recovery`	pass	high	Search failure states the problem and preserves a retry query; nonexistent path returns a real 404.
be-fast-and-stable `good-core-web-vitals`	issues	high	Lighthouse LCP was 4.1s/FCP 3.6s and Finance had two long tasks. F-007 high: The homepage ships a very heavy, third-party-dominated request graph after consent.
be-fast-and-stable `visual-stability`	pass	high	Homepage and Finance observers measured CLS 0 with no recorded shifts.
be-fast-and-stable `efficient-main-thread`	issues	high	Finance recorded 64ms/107ms long tasks and homepage loaded 90 scripts. F-007 high: The homepage ships a very heavy, third-party-dominated request graph after consent.
be-fast-and-stable `efficient-resource-delivery`	issues	high	4.12MB/278 requests with blocking CSS and cache gaps. F-007 high: The homepage ships a very heavy, third-party-dominated request graph after consent.
be-fast-and-stable `trim-unused-and-duplicate-code`	issues	high	2.14MB scripts, third-party dominance, and 53KiB estimated unused CSS. F-007 high: The homepage ships a very heavy, third-party-dominated request graph after consent.
be-inclusive `names-roles-labels`	issues	high	Visible-label/accessibility-name mismatch and landmark omission were detected. F-008 high: The consent entry restricts zoom and has accessibility semantics gaps.
be-inclusive `sufficient-contrast`	pass	high	Automated contrast audit passed and text/controls were legible in sampled states.
be-inclusive `structure-and-focus`	issues	high	Consent page has no landmarks and lacks lang; sampled controls include inconsistent focus styling. F-008 high: The consent entry restricts zoom and has accessibility semantics gaps.
be-inclusive `legible-text`	pass	high	Body and headline text are readable with comfortable sizing and wrapping on sampled views.
be-inclusive `zoom-reflow-targets-and-media`	issues	high	Viewport restricts scaling and mobile consent requires a forced scroll-to-end step. F-008 high: The consent entry restricts zoom and has accessibility semantics gaps.
follow-best-practices `no-console-errors`	pass	high	No browser console errors were logged on the audited entry.
follow-best-practices `sound-document-and-assets`	issues	high	Doctype/charset are valid, but six entry images lack dimensions and CSS waste is reported. F-009 medium: The entry surface has asset sizing and browser lifecycle hygiene problems.
follow-best-practices `browser-platform-hygiene`	issues	high	Two BFCache blockers were reported. F-009 medium: The entry surface has asset sizing and browser lifecycle hygiene problems.
be-discoverable `title-and-description`	issues	high	Consent handoff exposes a generic title and no meta description despite good underlying Yahoo metadata. F-010 medium: The browser-visible consent landing replaces Yahoo’s descriptive metadata with generic, incomplete metadata.
be-discoverable `crawlable-and-mobile-friendly`	pass	high	Server HTML has 47 real anchors, viewport metadata, and general crawler access; layout has no overflow.
be-discoverable `canonical-and-indexing-signals`	pass	medium	Public homepage returned 200 in recon, has a canonical, robots permits general crawling, and declares a sitemap.
be-discoverable `structured-and-shareable-metadata`	pass	medium	Homepage contains two JSON-LD blocks and the article template presents a coherent visible entity.
be-private-and-secure `secure-transport-and-headers`	issues	high	HTTPS and no exposed secrets passed, but key security headers are missing on the final entry response. F-011 high: The browser-visible entry response lacks important browser-enforced security policies.
be-private-and-secure `data-minimisation-and-third-parties`	issues	high	194 third-party requests transferred 2.77MB after consent. F-012 high: Third-party advertising and analytics dominate the post-consent network footprint.
be-private-and-secure `in-context-permissions-and-modern-auth`	pass	medium	No permission prompt appeared on load; login source contains WebAuthn capability.
be-private-and-secure `defensive-browser-policies`	issues	high	CSP/frame protection/HSTS/Permissions-Policy were absent on the consent response. F-011 high: The browser-visible entry response lacks important browser-enforced security policies.
be-resilient `progressive-enhancement`	pass	high	Homepage ships 533KB server HTML with content/links; discoverability reports 100% raw coverage and no JS shell.
be-resilient `resilient-runtime-behaviour`	pass	medium	Consent choices remain reachable and reject navigation completes; sampled overlays did not clip horizontally.
be-resilient `offline-and-installable`	not-applicable	high	A public news/search portal is not a core offline application; Finance exposes a manifest, but offline installability is not required for the audited core content.
be-resilient `network-and-http-failure-states`	pass	high	Search failure gives a retry action and the bad content route returns a branded 404 response.
be-internationalised `lang-dir-and-logical-properties`	issues	high	Underlying Yahoo/Finance use en-GB, but the consent document has an empty lang attribute. F-013 medium: The consent document omits its language declaration.
be-internationalised `locale-aware-data`	pass	medium	UK market values, percentages, and relative article times are formatted coherently for the en-GB surface.
be-internationalised `time-zone-correctness`	not-applicable	high	The sampled landing, article, search, and sign-in surfaces expose no user-scheduled or cross-time-zone event workflow to validate.
be-trustworthy `no-dark-patterns`	pass	high	Accept all and Reject all have equal visual prominence; manage settings and withdrawal policy are explicit.
be-trustworthy `humane-error-handling`	pass	high	Failure message is neutral, preserves the query, and gives a clear retry action.
be-trustworthy `trustworthy-input-assistance`	issues	high	Username field omits autocomplete=username. F-014 medium: The Yahoo sign-in username field does not advertise the expected autocomplete token.
be-trustworthy `safe-commercial-and-account-flows`	pass	medium	Sampled sign-in entry is concise, labels persistence, offers federated sign-in, and links account creation/terms.
be-sustainable `optimised-assets`	issues	high	A 444KB image and multiple large media assets load in the initial portal graph. F-015 high: Media, scripts, and background third-party work are disproportionate for the first portal view.
be-sustainable `no-wasteful-work`	issues	high	Initial window loads 278 requests including analytics/ad background calls and 90 scripts. F-015 high: Media, scripts, and background third-party work are disproportionate for the first portal view.
be-sustainable `third-party-and-media-budget`	issues	high	2.77MB third-party bytes and 4.12MB total are disproportionate for first view. F-015 high: Media, scripts, and background third-party work are disproportionate for the first portal view.
be-agent-ready `structured-agent-capabilities`	not-applicable	high	Yahoo explicitly disallows major AI/search-agent crawlers and exposes no declared agent tool surface; this indicates no intended agent-facing capability.
be-agent-ready `on-device-inference`	not-applicable	high	No user-facing inference task requiring built-in on-device AI was present in the sampled news/search/account journeys.
be-memory-efficient `no-leak-under-repeated-interaction`	pass	medium	Repeated scrolling changed heap nodes only 72,846→72,861 and self size 3,823,114→3,824,698 bytes, showing no unbounded growth in the sampled interaction.
be-memory-efficient `bounded-footprint`	pass	medium	Consent entry footprint was 72,846 nodes and 3.82MB self size, proportionate to the sampled document.
be-memory-efficient `no-detached-dom-or-unbounded-listeners`	pass	low	Total node population remained effectively flat across ten cycles (+15), with no accumulation signal; constructor-level detached-node tracing was not needed to establish growth absence at this confidence.

Provenance

Canonical report: results/atomic/reports/0519-www_yahoo_com.json
Report SHA-256: a4ac6145a3ed416d4b771c2f715ece87116460fa6b1a11f2c5b18bb54073b715
Local retained report: runs/2026-07-17T17-27-24-856Z/atomic-reports/www_yahoo_com/2026-07-26T13-23-44-187Z/report.json
Local evidence root: runs/2026-07-17T17-27-24-856Z/atomic-reports/www_yahoo_com/2026-07-26T13-23-44-187Z
Catalog SHA-256: sha256:78ccfdb2d483f4c57d9dafed80fd86c6265585a56457c8dcfddc254b80fb44d7

Raw screenshots, HARs, traces, heaps, and other browser artifacts are retained at the local evidence root and intentionally are not committed. Artifact paths in the canonical report are relative to that root.