{ "url": "https://www.vinted.fr", "auditedAt": "2026-07-21T07:53:17.389Z", "mode": "report", "status": "completed", "statusDetail": "Coverage-complete representative public-path audit; no account was created and no transaction was submitted.", "page": { "appType": "hybrid", "framework": "Next.js-style server-rendered/hydrated marketplace", "notes": "Public marketplace with SSR content, listing/detail templates, signup entry and first-visit locale/consent overlays." }, "evidenceUsed": [ "screenshot", "dom", "evaluate-probe", "layout-metrics", "trace", "har", "discoverability", "images", "headers", "cookies", "trackers", "secrets", "heap-summary", "lighthouse", "robots/sitemap fetch" ], "guidanceConsulted": [ "dark-mode", "component-specific-light-dark-theme", "accessibility", "adapt-scrollbar-to-contrast-preferences", "same-document-transitions", "cross-document-transitions", "group-element-transitions", "faster-spa-view-transitions", "scrollytelling", "parallax-scroll-effects", "scroll-entry-exit-effects", "carousel-slide-effects", "physics-based-easing", "individual-transform-properties", "animate-element-entry-exit", "animate-to-from-top-layer", "animate-to-intrinsic-sizes", "dynamic-sibling-animations", "interactive-content-reveal", "pull-to-reveal", "swipe-to-remove", "shrinking-header-on-scroll", "scroll-progress-indicator", "scroll-position-aware-elements", "scroll-snap-realtime-feedback", "scroll-snap-state-sync", "scroll-target-on-load", "soft-edge-content-fade", "scrollability-affordance-hints", "anchor-positioning-tab-underline", "position-aware-tooltips", "interest-triggered-tooltips", "interest-triggered-action-previews", "directional-navigation-transitions", "carousel-snap-highlights", "navigation-drawer", "stack-drill-down", "persistent-app-tours", "persistent-toast-notifications", "light-dismiss-a-dialog", "platform-controls-dismiss-dialog", "declarative-dialog-popover-control", "animated-select-picker", "branded-select-styling", "brand-consistent-forms", "custom-select-picker-layouts", "rich-media-picker", "complex-shapes", "shaped-cutouts", "overflow-clipping-control", "visually-texture-content", "apply-webgl-shaders", "interactive-content-in-3d-scenes", "highlight-text-ranges", "prevent-text-wrapping", "customize-scrollbar-color-and-thickness", "export-html-media-from-canvas", "fluid-scaling", "calculate-with-intrinsic-sizes", "css-layout", "size-aware-styling", "content-based-styling", "child-state-based-styling", "design-token-reactivity", "dynamic-sibling-styling", "form-fields-automatically-fit-contents", "improve-text-layout-and-legibility", "forms", "custom-button-actions", "accessible-error-announcement", "required-field-feedback", "validate-input-after-interaction", "identify-inp-causes", "schedule-tasks-by-priority", "optimize-preload-priority", "improve-next-page-load-performance", "interactions-in-complex-layouts", "performance", "visually-stable-font-fallbacks", "break-up-long-tasks", "identify-heavy-scripts", "optimize-script-priority", "defer-rendering-heavy-content", "defer-work-until-scroll-ends", "optimize-image-priority", "conditional-async-dependencies", "expose-canvas-content-to-browser-features", "move-dom-element-without-losing-state", "precise-text-alignment", "visually-stable-mixed-fonts", "css", "html", "reduce-style-repetition", "security", "privacy", "batch-analytics-events", "full-session-analytics", "calculate-total-foreground-time", "passkeys", "passkey-registration", "passkey-authentication", "passkey-reauthentication", "passkey-conditional-create", "passkey-management", "flicker-free-client-side-ab-testing", "consistent-cross-document-transitions", "stabilize-reactive-state", "resilient-context-menus-and-nested-dropdowns", "persistent-top-layer-ui", "detect-initial-visibility-state", "sequence-distributed-events", "translator", "language-detection", "support-global-calendar-systems", "capture-location-agnostic-data", "format-human-readable-durations", "manage-recurring-intervals", "calculate-event-differentials", "coordinate-global-events", "model-partial-time-concepts", "search-hidden-content", "select-menu-interaction", "style-parent-with-has", "autofill-address-form", "autofill-payment-form", "autofill-sign-in-form", "autofill-sign-up-form", "autofill-highlight-inputs", "deliver-optimized-decorative-images", "resolution-optimized-pseudo-elements", "deprioritize-background-fetches", "efficient-background-processing", "webmcp", "agentic-forms", "agentic-javascript-tools", "language-model", "summarizer" ], "config": { "loaded": false }, "coverage": { "catalogVersion": "modern-web-guidance@0.0.172", "catalogChecksum": "sha256:78ccfdb2d483f4c57d9dafed80fd86c6265585a56457c8dcfddc254b80fb44d7", "expected": 58, "recorded": 58, "judged": 58, "blocked": 0, "notRun": 0, "missing": 0, "unknown": 0, "duplicates": 0, "complete": true }, "checkOutcomes": [ { "principleId": "respect-user-preferences", "checkId": "respects-color-scheme", "status": "issues", "confidence": "high", "method": "Emulated dark media plus computed-style probe", "evidence": "Under emulated prefers-color-scheme: dark, the body remained rgb(237,242,242), the root color-scheme was normal, and the dark screenshot retained light surfaces.", "artifacts": [ "evidence/preferences-probe.json" ], "findingIds": [ "F01" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "status": "pass", "confidence": "high", "method": "Emulated reduced-motion evaluate probe", "evidence": "Under prefers-reduced-motion: reduce, getAnimations() returned no active animations on the loaded homepage.", "artifacts": [ "evidence/preferences-probe.json" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "status": "pass", "confidence": "high", "method": "Forced-colors screenshot plus Lighthouse contrast audit", "evidence": "The forced-colors/high-contrast screenshot retained visible text, controls, dialog boundaries and actions; Lighthouse also passed color contrast.", "artifacts": [ "evidence/home-forced-colors.png" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "status": "issues", "confidence": "medium", "method": "CSSOM signal probe and route walkthrough", "evidence": "Rendered CSS inspection found zero view-transition declarations across the multi-route marketplace; route changes use full page swaps without continuity.", "artifacts": [ "evidence/platform-probe.json" ], "findingIds": [ "F02" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "status": "pass", "confidence": "medium", "method": "CSSOM and visual recon", "evidence": "CSSOM found no animation-timeline/scroll-timeline usage, and recon found no scroll-linked visual effect that required a main-thread or declarative implementation.", "artifacts": [ "evidence/platform-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "status": "pass", "confidence": "medium", "method": "Visual and DOM interaction recon", "evidence": "The tested marketplace paths used native scrolling and conventional button/link controls; no custom pointer-driven gesture that fights platform behavior was observed.", "artifacts": [ "evidence/home-dom.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "status": "issues", "confidence": "medium", "method": "CSSOM signal probe and long-page screenshot", "evidence": "CSSOM found no scroll-state or scroll-timeline signal; the long listing keeps static chrome and provides no progress/position feedback.", "artifacts": [ "evidence/platform-probe.json" ], "findingIds": [ "F03" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "status": "not-applicable", "confidence": "high", "method": "Overlay inventory across representative paths", "evidence": "No tooltip or edge-positioned transient menu was required on the representative public paths; the visible country/consent surfaces are modal dialogs, not anchored popovers.", "artifacts": [ "evidence/platform-probe.json" ], "reason": "No applicable anchored tooltip/popover surface was present." }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "status": "pass", "confidence": "high", "method": "Route screenshots, heading and focus probe", "evidence": "Catalog and item paths expose breadcrumbs, clear headings and visible focus cues, preserving orientation from listing to detail.", "artifacts": [ "evidence/item-probe.json" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "status": "issues", "confidence": "high", "method": "First-load desktop and mobile screenshots", "evidence": "A first-visit screenshot shows two simultaneous interruptions before interaction: a centered country modal obscures the page while a full-width consent banner covers the lower viewport; on 360x800 the country modal consumes nearly the whole screen.", "artifacts": [ "evidence/home-desktop.png" ], "findingIds": [ "F04" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "status": "issues", "confidence": "high", "method": "DOM overlay inventory", "evidence": "Overlay inventory found three custom DIV role=dialog surfaces and no native dialog/popover elements; the visible country modal is manually implemented rather than using the platform dialog primitive.", "artifacts": [ "evidence/platform-probe.json" ], "findingIds": [ "F05" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "status": "pass", "confidence": "medium", "method": "Representative screenshots", "evidence": "After accounting for first-visit overlays, the homepage and item template devote the main area to products, imagery, price and primary actions with restrained persistent chrome.", "artifacts": [ "evidence/item-desktop.png" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "status": "pass", "confidence": "high", "method": "Mobile layout probes", "evidence": "At 360x800, homepage and item layout probes both reported scrollWidth=clientWidth=360, horizontalOverflowPx=0, and a viewport meta tag.", "artifacts": [ "evidence/home-mobile-layout.json" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "status": "issues", "confidence": "medium", "method": "CSSOM component responsiveness probe", "evidence": "CSSOM inspection found zero @container rules despite cards, header controls and commerce panels being reused across listing/detail and narrow/wide contexts.", "artifacts": [ "evidence/platform-probe.json" ], "findingIds": [ "F06" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "status": "pass", "confidence": "medium", "method": "Programmatic focus and target geometry probe", "evidence": "Visible keyboard-focused controls had a browser focus outline, navigation controls were generally 36-44px high, and the mobile layouts remained operable.", "artifacts": [ "evidence/platform-probe.json" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "status": "pass", "confidence": "high", "method": "Homepage and item walkthrough", "evidence": "The homepage first content clearly asks users to sell and offers “Commencer à vendre”; item pages expose price, “Acheter”, offer and message actions.", "artifacts": [ "evidence/item-probe.json" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "status": "pass", "confidence": "medium", "method": "Multi-route task walkthrough", "evidence": "The representative browse journey reached catalog, a live item with price and protection details, and the clearly-labelled purchase/signup entry without a dead end; account creation was not completed to avoid side effects.", "artifacts": [ "evidence/item-probe.json" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "status": "pass", "confidence": "high", "method": "404 state screenshot and DOM probe", "evidence": "An invalid route rendered an explicit Page not found state with “Explore Vinted” and “Visit Help Center” recovery actions.", "artifacts": [ "evidence/404-probe.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "status": "issues", "confidence": "high", "method": "Lighthouse plus DevTools trace summary", "evidence": "Mobile Lighthouse measured LCP 7.5s, FCP 6.1s, TBT 1,180ms and performance 0.33; the first-party trace still recorded LCP 2.26s and 435ms TBT under a separate run.", "artifacts": [ "evidence/lighthouse-summary.json" ], "findingIds": [ "F07" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "status": "pass", "confidence": "high", "method": "Layout-shift observers and Lighthouse", "evidence": "Homepage mobile CLS was 0.060 and item mobile CLS 0.053, both below the 0.1 good threshold.", "artifacts": [ "evidence/home-mobile-layout.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "status": "issues", "confidence": "high", "method": "Trace summary and Lighthouse", "evidence": "Trace recorded six long tasks, a 271ms longest task and 434.76ms total blocking time; Lighthouse measured 1,180ms TBT.", "artifacts": [ "evidence/home-trace-summary.json" ], "findingIds": [ "F08" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "status": "issues", "confidence": "high", "method": "HAR summary and navigation timing", "evidence": "HAR recorded 144 requests and 3,169,147 transferred bytes, including 73 scripts (1.30MB) and 29 images (834KB), while loadEventEnd was about 4.88s in the runtime probe.", "artifacts": [ "evidence/home-summary.json" ], "findingIds": [ "F09" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "status": "issues", "confidence": "high", "method": "Lighthouse code-coverage audits", "evidence": "Lighthouse estimated 267KiB unused JavaScript and 95KiB unused CSS; individual chunks were 57-87% unused and a primary CSS file was 93% unused.", "artifacts": [ "evidence/lighthouse-summary.json" ], "findingIds": [ "F10" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "status": "pass", "confidence": "high", "method": "Lighthouse accessibility and image inventory", "evidence": "Lighthouse accessibility scored 0.97 and passed button-name, link-name and form-label audits; product images carried detailed alt text.", "artifacts": [ "evidence/lighthouse-summary.json" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "status": "pass", "confidence": "high", "method": "Lighthouse contrast audit plus forced-colors screenshot", "evidence": "Lighthouse passed its color-contrast audit and the forced-colors capture retained readable controls and copy.", "artifacts": [ "evidence/home-forced-colors.png" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "status": "pass", "confidence": "medium", "method": "Landmark/focus probe plus Lighthouse", "evidence": "The page has header/nav/main/footer landmarks, a skip link, sequential heading audit pass, and visible outlines on focused visible links, inputs and category buttons.", "artifacts": [ "evidence/platform-probe.json" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "status": "pass", "confidence": "high", "method": "Visual screenshots and layout probes", "evidence": "Representative desktop and mobile screenshots show readable text sizing, unclipped product details and clear action labels; no horizontal overflow was measured.", "artifacts": [ "evidence/item-desktop.png" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "status": "pass", "confidence": "high", "method": "Viewport metadata, mobile layout and media inventory", "evidence": "Viewport permits scaling, both 360px probes reflowed without overflow, and no essential audio/video needing captions appeared on audited paths.", "artifacts": [ "evidence/home-mobile-layout.json" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "status": "pass", "confidence": "high", "method": "Lighthouse console audit", "evidence": "Lighthouse reported “No browser errors logged to the console” with an empty details list.", "artifacts": [ "evidence/lighthouse-summary.json" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "status": "issues", "confidence": "high", "method": "DOM/image primitive and Lighthouse", "evidence": "The document has valid doctype/UTF-8 and correct displayed aspect ratios, but all 30 img elements lacked width/height attributes, 25 below-fold images were not lazy, and 22 lacked srcset.", "artifacts": [ "evidence/images.json" ], "findingIds": [ "F11" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "status": "issues", "confidence": "high", "method": "Lighthouse best-practices diagnostics", "evidence": "Lighthouse found four BFCache blockers and three deprecated-API warnings from the challenge script, including deprecated Shared Storage and persistent storage usage.", "artifacts": [ "evidence/lighthouse-summary.json" ], "findingIds": [ "F12" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "status": "pass", "confidence": "high", "method": "DOM metadata probes", "evidence": "Homepage, catalog/item and signup surfaces have descriptive titles; homepage has a substantive meta description.", "artifacts": [ "evidence/home-recon.json" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "status": "pass", "confidence": "high", "method": "Lighthouse SEO plus DOM probe", "evidence": "Lighthouse passed crawlable anchors and descriptive link text; the DOM has real href links, index robots meta and a valid viewport tag.", "artifacts": [ "evidence/home-recon.json" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "status": "pass", "confidence": "high", "method": "HTTP/DOM indexing probe", "evidence": "The homepage returns 200, declares canonical https://www.vinted.fr/, exposes 27 hreflang alternatives, robots and sitemap are reachable, and robots meta is index.", "artifacts": [ "evidence/platform-probe.json" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "status": "pass", "confidence": "high", "method": "Homepage and item metadata probes", "evidence": "Homepage provides WebPage/Organization JSON-LD and complete Open Graph/Twitter metadata; the audited item provides matching Product/Offer JSON-LD with price, currency, availability and image.", "artifacts": [ "evidence/item-probe.json" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "status": "issues", "confidence": "high", "method": "Header and cookie primitives", "evidence": "The page is HTTPS, but the header primitive found no CSP, HSTS or nosniff header; 12 of 16 first-party cookies lacked Secure, including long-lived identifiers/session-adjacent cookies.", "artifacts": [ "evidence/headers.json" ], "findingIds": [ "F13" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "status": "issues", "confidence": "high", "method": "Consent screenshot, tracker and HAR primitives", "evidence": "The consent UI states 800 partners and purposes including precise geolocation/device identification; network recon contacted 12 non-document origins and multiple metrics/log ingress services on first load.", "artifacts": [ "evidence/trackers.json" ], "findingIds": [ "F14" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "status": "issues", "confidence": "medium", "method": "Signup walkthrough and permission/auth probe", "evidence": "No browser permission was granted or prompted on load, but the signup path exposed Google/Apple/Facebook/email methods and no passkey/WebAuthn option or credential registration surface.", "artifacts": [ "evidence/signup-probe.json" ], "findingIds": [ "F15" ] }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "status": "issues", "confidence": "high", "method": "Security header primitive", "evidence": "Headers lacked clickjacking protection, Referrer-Policy and Permissions-Policy as well as CSP/HSTS.", "artifacts": [ "evidence/headers.json" ], "findingIds": [ "F16" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "status": "pass", "confidence": "medium", "method": "Discoverability raw-vs-rendered capture", "evidence": "Raw server HTML returned 200 with title and meta description, was not a JS shell, and contained 53% of rendered content vocabulary; core marketplace copy/links remained present to a no-JS crawler.", "artifacts": [ "evidence/discoverability.json" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "status": "pass", "confidence": "medium", "method": "Mobile screenshots, layout and repeated interaction heap", "evidence": "Country and privacy dialogs remained contained/scrollable at narrow width, mobile paths had no horizontal clipping, and repeated modal interaction did not increase retained heap.", "artifacts": [ "evidence/heap-post.json" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "status": "not-applicable", "confidence": "high", "method": "Manifest/service-worker probe", "evidence": "The audited public marketplace has no manifest or controlling service worker and purchasing depends on live inventory, identity and payment; installability/offline transaction support is not a reasonable requirement for this scoped public-web audit.", "artifacts": [ "evidence/platform-probe.json" ], "reason": "The live inventory/payment marketplace is intrinsically online; offline/installable behavior is out of scope." }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "status": "pass", "confidence": "high", "method": "404 screenshot and DOM probe", "evidence": "A representative missing route produced an actionable error state rather than a blank shell, with links back to marketplace and help.", "artifacts": [ "evidence/404-probe.json" ] }, { "principleId": "be-internationalised", "checkId": "lang-dir-and-logical-properties", "status": "issues", "confidence": "medium", "method": "DOM locale and CSSOM probe", "evidence": "The page correctly declares lang=fr-FR and 27 hreflang variants, but CSSOM found zero logical-property signals and 147 physical left/right declarations, weakening writing-mode resilience.", "artifacts": [ "evidence/platform-probe.json" ], "findingIds": [ "F17" ] }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "status": "pass", "confidence": "high", "method": "Rendered content and locale metadata probe", "evidence": "French price rendering uses decimal commas, nonbreaking spaces and EUR symbols consistently, and locale metadata declares fr-FR across representative listing/item paths.", "artifacts": [ "evidence/item-probe.json" ] }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "status": "not-applicable", "confidence": "high", "method": "Rendered date/time inventory", "evidence": "The public audited paths show relative recency labels and product commerce data, but no scheduled cross-zone event, stored appointment or exact civil time requiring DST/time-zone arithmetic.", "artifacts": [ "evidence/item-probe.json" ], "reason": "No time-zone-sensitive event or scheduling surface exists on the representative public paths." }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "status": "pass", "confidence": "medium", "method": "Consent and item screenshots", "evidence": "The consent banner provides equally visible “Accepter tout” and “Cookies requis uniquement” choices plus management, item prices show both base and buyer-protection-inclusive totals, and purchase commitments are labelled.", "artifacts": [ "evidence/home-desktop.png" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "status": "pass", "confidence": "medium", "method": "Error-state walkthrough and Lighthouse accessibility", "evidence": "The tested 404 error uses neutral language and clear recovery actions; Lighthouse passed labels and accessible names. No premature validation was observed on the exposed search/signup entry.", "artifacts": [ "evidence/404-probe.json" ] }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "status": "pass", "confidence": "medium", "method": "Signup and form inventory", "evidence": "The public signup entry offers established identity providers and an email route; the exposed search fields do not collect address/payment/account data requiring specialized autocomplete tokens.", "artifacts": [ "evidence/signup-probe.json" ] }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "status": "pass", "confidence": "high", "method": "Item task walkthrough", "evidence": "The item page clearly displays item price, buyer-protection-inclusive total, shipping starting price, safety policy and distinct Buy/Offer/Message actions before signup.", "artifacts": [ "evidence/item-probe.json" ] }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "status": "issues", "confidence": "high", "method": "Image inventory and HAR", "evidence": "Although 27 of 30 images were modern formats, 25 below-fold images were eager, 22 lacked responsive srcset, one hero was oversized and three assets used legacy formats.", "artifacts": [ "evidence/images.json" ], "findingIds": [ "F18" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "status": "issues", "confidence": "high", "method": "HAR, Lighthouse and trace", "evidence": "First load transferred 3.17MB over 144 requests with 73 scripts, while Lighthouse identified 267KiB unused JS and the trace recorded 435ms blocking time.", "artifacts": [ "evidence/home-summary.json" ], "findingIds": [ "F19" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "status": "issues", "confidence": "high", "method": "Tracker and HAR summaries", "evidence": "Twelve non-document origins participated in load; third-party-style asset, consent, metrics, logging and bot-defense services contributed to a 144-request, 3.17MB first visit.", "artifacts": [ "evidence/trackers.json" ], "findingIds": [ "F20" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "status": "not-applicable", "confidence": "high", "method": "WebMCP/metadata probe", "evidence": "No declared agent-facing intent or WebMCP surface was found. Although product JSON-LD aids extraction, this emerging capability is not assumed without site intent.", "artifacts": [ "evidence/platform-probe.json" ], "reason": "No declared agent-facing capability or intent was observable; emerging WebMCP exposure is therefore not required." }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "status": "not-applicable", "confidence": "high", "method": "Platform and task inventory", "evidence": "No summarisation or language-model task was present on the representative commerce paths that would justify built-in on-device inference.", "artifacts": [ "evidence/platform-probe.json" ], "reason": "No user task on the audited paths calls for on-device language-model or summarizer inference." }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "status": "pass", "confidence": "medium", "method": "Baseline/post heap-summary comparison", "evidence": "After ten open/close attempts of the locale modal, heap totals were lower than the independent baseline: 822,402 vs 827,084 nodes and 45.29MB vs 45.58MB self size; no retained-growth signal appeared.", "artifacts": [ "evidence/heap-post.json" ] }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "status": "pass", "confidence": "medium", "method": "Runtime metrics and heap summary", "evidence": "The loaded page used about 74.4MB JS heap and 2,713 live DOM elements; heap snapshot self size was about 45.6MB, proportionate to a product-rich marketplace page.", "artifacts": [ "evidence/runtime-metrics.json" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "status": "pass", "confidence": "medium", "method": "Baseline/post heap-summary comparison", "evidence": "The repeated-interaction heap summary did not grow in node count or total self size versus baseline; no accumulating detached-node footprint was signalled by the summaries.", "artifacts": [ "evidence/heap-post.json" ] } ], "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F01" ] }, { "principleId": "implement-natural-interactions", "expectation": "default", "status": "issues", "findingIds": [ "F02" ] }, { "principleId": "provide-guided-navigation", "expectation": "default", "status": "issues", "findingIds": [ "F03" ] }, { "principleId": "maximize-content-reduce-noise", "expectation": "default", "status": "issues", "findingIds": [ "F04", "F05" ] }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "issues", "findingIds": [ "F06" ] }, { "principleId": "support-core-task-success", "expectation": "default", "status": "pass" }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F07", "F08", "F09", "F10" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "pass" }, { "principleId": "follow-best-practices", "expectation": "default", "status": "issues", "findingIds": [ "F11", "F12" ] }, { "principleId": "be-discoverable", "expectation": "default", "status": "pass" }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F13", "F14", "F15", "F16" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "pass" }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "issues", "findingIds": [ "F17" ] }, { "principleId": "be-trustworthy", "expectation": "default", "status": "pass" }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F18", "F19", "F20" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "not-applicable", "reason": "No declared agent-facing capability or intent was observable; emerging WebMCP exposure is therefore not required. No user task on the audited paths calls for on-device language-model or summarizer inference." }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "pass" } ], "paths": [ { "id": "home", "description": "Homepage and first-visit experience: primary sell action, product feed, locale and consent overlays; desktop/mobile, dark, reduced-motion and forced-colors conditions.", "url": "https://www.vinted.fr/", "conditions": [ "1440x900", "360x800", "prefers-color-scheme: dark", "prefers-reduced-motion: reduce", "forced-colors: active" ], "result": "issues" }, { "id": "catalog", "description": "Dress catalog listing archetype: breadcrumb, filtering, long feed and reusable product cards.", "url": "https://www.vinted.fr/catalog/10-dresses", "conditions": [ "1440x900" ], "result": "issues" }, { "id": "item", "description": "Live product-detail/purchase-entry archetype: media, price, protection, seller, Buy/Offer/Message actions and Product JSON-LD.", "url": "https://www.vinted.fr/items/9451117492-crop-top-manga-larga", "conditions": [ "1440x900", "360x800" ], "result": "issues" }, { "id": "signup", "description": "Signup/authentication entry reached from primary commercial actions; provider and email choices inspected without creating an account.", "url": "https://www.vinted.fr/member/signup/select_type", "conditions": [ "1440x900", "360x800" ], "result": "issues" }, { "id": "how-it-works", "description": "Informational content archetype explaining the marketplace model.", "url": "https://www.vinted.fr/how_it_works", "conditions": [ "1440x900" ], "result": "issues" }, { "id": "not-found", "description": "Representative HTTP/navigation recovery state.", "url": "https://www.vinted.fr/this-route-does-not-exist-web-uplift", "conditions": [ "1440x900" ], "result": "pass" } ], "artifacts": [ { "type": "other", "path": "evidence/404-probe.json", "caption": "404 probe json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/404.png", "caption": "404 png", "findingIds": [] }, { "type": "other", "path": "evidence/buttons.json", "caption": "buttons json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/catalog-desktop.png", "caption": "catalog desktop png", "findingIds": [] }, { "type": "other", "path": "evidence/cookies.json", "caption": "cookies json", "findingIds": [] }, { "type": "other", "path": "evidence/coverage-manifest.json", "caption": "coverage manifest json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/discoverability-crawler.png", "caption": "discoverability crawler png", "findingIds": [] }, { "type": "screenshot", "path": "evidence/discoverability-rendered.png", "caption": "discoverability rendered png", "findingIds": [] }, { "type": "discoverability", "path": "evidence/discoverability.json", "caption": "discoverability json", "findingIds": [] }, { "type": "other", "path": "evidence/guidance-consulted.md", "caption": "guidance consulted md", "findingIds": [] }, { "type": "other", "path": "evidence/headers.json", "caption": "headers json", "findingIds": [ "F13", "F16" ] }, { "type": "heap", "path": "evidence/heap-baseline.json", "caption": "heap baseline json", "findingIds": [] }, { "type": "heap", "path": "evidence/heap-post.json", "caption": "heap post json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-clean.png", "caption": "home clean png", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-dark.png", "caption": "home dark png", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "home desktop png", "findingIds": [ "F04" ] }, { "type": "dom", "path": "evidence/home-dom.json", "caption": "home dom json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-forced-colors.png", "caption": "home forced colors png", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-mobile-clean.png", "caption": "home mobile clean png", "findingIds": [] }, { "type": "layout", "path": "evidence/home-mobile-layout.json", "caption": "home mobile layout json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-mobile.png", "caption": "home mobile png", "findingIds": [] }, { "type": "other", "path": "evidence/home-recon.json", "caption": "home recon json", "findingIds": [] }, { "type": "har-summary", "path": "evidence/home-summary.json", "caption": "home summary json", "findingIds": [ "F09", "F19" ] }, { "type": "trace-summary", "path": "evidence/home-trace-summary.json", "caption": "home trace summary json", "findingIds": [ "F08" ] }, { "type": "trace", "path": "evidence/home-trace.json", "caption": "home trace json", "findingIds": [] }, { "type": "har", "path": "evidence/home.har", "caption": "home har", "findingIds": [] }, { "type": "screenshot", "path": "evidence/how-it-works.png", "caption": "how it works png", "findingIds": [] }, { "type": "other", "path": "evidence/images.json", "caption": "images json", "findingIds": [ "F11", "F18" ] }, { "type": "screenshot", "path": "evidence/item-desktop.png", "caption": "item desktop png", "findingIds": [] }, { "type": "layout", "path": "evidence/item-mobile-layout.json", "caption": "item mobile layout json", "findingIds": [] }, { "type": "other", "path": "evidence/item-probe.json", "caption": "item probe json", "findingIds": [] }, { "type": "lighthouse", "path": "evidence/lighthouse-summary.json", "caption": "lighthouse summary json", "findingIds": [ "F07", "F10", "F12" ] }, { "type": "lighthouse", "path": "evidence/lighthouse.json", "caption": "lighthouse json", "findingIds": [] }, { "type": "other", "path": "evidence/overlay-clean-probe.json", "caption": "overlay clean probe json", "findingIds": [] }, { "type": "other", "path": "evidence/permissions-auth-probe.json", "caption": "permissions auth probe json", "findingIds": [] }, { "type": "other", "path": "evidence/platform-probe.json", "caption": "platform probe json", "findingIds": [ "F02", "F03", "F05", "F06", "F17" ] }, { "type": "other", "path": "evidence/preferences-probe.json", "caption": "preferences probe json", "findingIds": [ "F01" ] }, { "type": "other", "path": "evidence/robots-headers.txt", "caption": "robots headers txt", "findingIds": [] }, { "type": "other", "path": "evidence/robots.txt", "caption": "robots txt", "findingIds": [] }, { "type": "other", "path": "evidence/runtime-metrics.json", "caption": "runtime metrics json", "findingIds": [] }, { "type": "other", "path": "evidence/secrets.json", "caption": "secrets json", "findingIds": [] }, { "type": "other", "path": "evidence/signup-probe.json", "caption": "signup probe json", "findingIds": [ "F15" ] }, { "type": "other", "path": "evidence/signup-validation-probe.json", "caption": "signup validation probe json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/signup-validation.png", "caption": "signup validation png", "findingIds": [] }, { "type": "screenshot", "path": "evidence/signup.png", "caption": "signup png", "findingIds": [] }, { "type": "other", "path": "evidence/sitemap.xml", "caption": "sitemap xml", "findingIds": [] }, { "type": "other", "path": "evidence/trackers.json", "caption": "trackers json", "findingIds": [ "F14", "F20" ] } ], "findings": [ { "id": "F01", "severity": "medium", "confidence": "high", "principleId": "respect-user-preferences", "principleCheckId": "respects-color-scheme", "guidanceId": "dark-mode", "summary": "Under emulated prefers-color-scheme: dark, the body remained rgb(237,242,242), the root color-scheme was normal, and the dark screenshot retained light surfaces..", "evidence": "Under emulated prefers-color-scheme: dark, the body remained rgb(237,242,242), the root color-scheme was normal, and the dark screenshot retained light surfaces.", "artifacts": [ "evidence/preferences-probe.json" ], "suggestedFix": "Add system-driven dark tokens with color-scheme and prefers-color-scheme/light-dark(), including overlays.", "effort": "medium", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F02", "severity": "low", "confidence": "medium", "principleId": "implement-natural-interactions", "principleCheckId": "view-transitions", "guidanceId": "cross-document-transitions", "summary": "Rendered CSS inspection found zero view-transition declarations across the multi-route marketplace.", "evidence": "Rendered CSS inspection found zero view-transition declarations across the multi-route marketplace; route changes use full page swaps without continuity.", "artifacts": [ "evidence/platform-probe.json" ], "suggestedFix": "Add progressive cross-document or same-document View Transitions to listing/detail navigation, respecting reduced motion.", "effort": "small", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F03", "severity": "low", "confidence": "medium", "principleId": "provide-guided-navigation", "principleCheckId": "scroll-state-aware-chrome", "guidanceId": "scroll-progress-indicator", "summary": "CSSOM found no scroll-state or scroll-timeline signal.", "evidence": "CSSOM found no scroll-state or scroll-timeline signal; the long listing keeps static chrome and provides no progress/position feedback.", "artifacts": [ "evidence/platform-probe.json" ], "suggestedFix": "Add lightweight declarative scroll-state/progress feedback where long listings benefit.", "effort": "small", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F04", "severity": "high", "confidence": "high", "principleId": "maximize-content-reduce-noise", "principleCheckId": "no-intrusive-interruptions", "guidanceId": "light-dismiss-a-dialog", "summary": "A first-visit screenshot shows two simultaneous interruptions before interaction: a centered country modal obscures the page while a full-width consent banner covers the lower viewport.", "evidence": "A first-visit screenshot shows two simultaneous interruptions before interaction: a centered country modal obscures the page while a full-width consent banner covers the lower viewport; on 360x800 the country modal consumes nearly the whole screen.", "artifacts": [ "evidence/home-desktop.png" ], "suggestedFix": "Do not stack country and consent interruptions; infer locale first, defer optional selection, and keep a single compact, dismissible consent choice.", "effort": "large", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F05", "severity": "medium", "confidence": "high", "principleId": "maximize-content-reduce-noise", "principleCheckId": "semantic-dismissible-primitives", "guidanceId": "declarative-dialog-popover-control", "summary": "Overlay inventory found three custom DIV role=dialog surfaces and no native dialog/popover elements.", "evidence": "Overlay inventory found three custom DIV role=dialog surfaces and no native dialog/popover elements; the visible country modal is manually implemented rather than using the platform dialog primitive.", "artifacts": [ "evidence/platform-probe.json" ], "suggestedFix": "Replace custom role=dialog shells with native dialog/popover semantics and platform dismissal/focus behavior.", "effort": "medium", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F06", "severity": "low", "confidence": "medium", "principleId": "adapt-to-the-form-factor", "principleCheckId": "component-level-responsiveness", "guidanceId": "size-aware-styling", "summary": "CSSOM inspection found zero @container rules despite cards, header controls and commerce panels being reused across listing/detail and narrow/wide contexts..", "evidence": "CSSOM inspection found zero @container rules despite cards, header controls and commerce panels being reused across listing/detail and narrow/wide contexts.", "artifacts": [ "evidence/platform-probe.json" ], "suggestedFix": "Adopt container queries for reused cards, header controls and commerce panels instead of viewport-only adaptation.", "effort": "small", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F07", "severity": "high", "confidence": "high", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "summary": "Mobile Lighthouse measured LCP 7.5s, FCP 6.1s, TBT 1,180ms and performance 0.33.", "evidence": "Mobile Lighthouse measured LCP 7.5s, FCP 6.1s, TBT 1,180ms and performance 0.33; the first-party trace still recorded LCP 2.26s and 435ms TBT under a separate run.", "artifacts": [ "evidence/lighthouse-summary.json" ], "suggestedFix": "Bring mobile LCP below 2.5s and TBT/INP into the good range by reducing startup work and prioritizing the LCP resource.", "effort": "large", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F08", "severity": "high", "confidence": "high", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-main-thread", "guidanceId": "break-up-long-tasks", "summary": "Trace recorded six long tasks, a 271ms longest task and 434.76ms total blocking time.", "evidence": "Trace recorded six long tasks, a 271ms longest task and 434.76ms total blocking time; Lighthouse measured 1,180ms TBT.", "artifacts": [ "evidence/home-trace-summary.json" ], "suggestedFix": "Split and defer startup tasks; isolate consent/bot-defense and nonessential hydration work from the critical interaction window.", "effort": "large", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F09", "severity": "high", "confidence": "high", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-resource-delivery", "guidanceId": "optimize-image-priority", "summary": "HAR recorded 144 requests and 3,169,147 transferred bytes, including 73 scripts (1.30MB) and 29 images (834KB), while loadEventEnd was about 4.88s in the runtime probe..", "evidence": "HAR recorded 144 requests and 3,169,147 transferred bytes, including 73 scripts (1.30MB) and 29 images (834KB), while loadEventEnd was about 4.88s in the runtime probe.", "artifacts": [ "evidence/home-summary.json" ], "suggestedFix": "Reduce the 144-request/3.17MB critical path, preload only the true LCP asset, lazy-load below-fold inventory and apply durable caching.", "effort": "large", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F10", "severity": "medium", "confidence": "high", "principleId": "be-fast-and-stable", "principleCheckId": "trim-unused-and-duplicate-code", "guidanceId": "identify-heavy-scripts", "summary": "Lighthouse estimated 267KiB unused JavaScript and 95KiB unused CSS.", "evidence": "Lighthouse estimated 267KiB unused JavaScript and 95KiB unused CSS; individual chunks were 57-87% unused and a primary CSS file was 93% unused.", "artifacts": [ "evidence/lighthouse-summary.json" ], "suggestedFix": "Route-split and conditionally load marketplace/consent code to remove the measured 267KiB JS and 95KiB CSS waste.", "effort": "medium", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F11", "severity": "medium", "confidence": "high", "principleId": "follow-best-practices", "principleCheckId": "sound-document-and-assets", "guidanceId": "html", "summary": "The document has valid doctype/UTF-8 and correct displayed aspect ratios, but all 30 img elements lacked width/height attributes, 25 below-fold images were not lazy, and 22 lacked srcset..", "evidence": "The document has valid doctype/UTF-8 and correct displayed aspect ratios, but all 30 img elements lacked width/height attributes, 25 below-fold images were not lazy, and 22 lacked srcset.", "artifacts": [ "evidence/images.json" ], "suggestedFix": "Emit intrinsic width/height or aspect-ratio for images, lazy-load below-fold inventory, and provide responsive sources.", "effort": "medium", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F12", "severity": "medium", "confidence": "high", "principleId": "follow-best-practices", "principleCheckId": "browser-platform-hygiene", "guidanceId": "html", "summary": "Lighthouse found four BFCache blockers and three deprecated-API warnings from the challenge script, including deprecated Shared Storage and persistent storage usage..", "evidence": "Lighthouse found four BFCache blockers and three deprecated-API warnings from the challenge script, including deprecated Shared Storage and persistent storage usage.", "artifacts": [ "evidence/lighthouse-summary.json" ], "suggestedFix": "Remove deprecated API calls from the challenge integration and eliminate actionable BFCache blockers where possible.", "effort": "medium", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F13", "severity": "high", "confidence": "high", "principleId": "be-private-and-secure", "principleCheckId": "secure-transport-and-headers", "guidanceId": "security", "summary": "The page is HTTPS, but the header primitive found no CSP, HSTS or nosniff header.", "evidence": "The page is HTTPS, but the header primitive found no CSP, HSTS or nosniff header; 12 of 16 first-party cookies lacked Secure, including long-lived identifiers/session-adjacent cookies.", "artifacts": [ "evidence/headers.json" ], "suggestedFix": "Deploy CSP, HSTS and nosniff; mark all HTTPS cookies Secure and review long-lived identifier/session cookie scope.", "effort": "large", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F14", "severity": "high", "confidence": "high", "principleId": "be-private-and-secure", "principleCheckId": "data-minimisation-and-third-parties", "guidanceId": "privacy", "summary": "The consent UI states 800 partners and purposes including precise geolocation/device identification.", "evidence": "The consent UI states 800 partners and purposes including precise geolocation/device identification; network recon contacted 12 non-document origins and multiple metrics/log ingress services on first load.", "artifacts": [ "evidence/trackers.json" ], "suggestedFix": "Minimise default partner purposes/origins, keep nonessential collection off until consent, and consolidate/batch telemetry.", "effort": "large", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F15", "severity": "medium", "confidence": "medium", "principleId": "be-private-and-secure", "principleCheckId": "in-context-permissions-and-modern-auth", "guidanceId": "passkeys", "summary": "No browser permission was granted or prompted on load, but the signup path exposed Google/Apple/Facebook/email methods and no passkey/WebAuthn option or credential registration surface..", "evidence": "No browser permission was granted or prompted on load, but the signup path exposed Google/Apple/Facebook/email methods and no passkey/WebAuthn option or credential registration surface.", "artifacts": [ "evidence/signup-probe.json" ], "suggestedFix": "Offer passkey/WebAuthn registration and sign-in alongside federated/email paths while keeping permissions contextual.", "effort": "medium", "pathId": "signup", "url": "https://www.vinted.fr/" }, { "id": "F16", "severity": "high", "confidence": "high", "principleId": "be-private-and-secure", "principleCheckId": "defensive-browser-policies", "guidanceId": "security", "summary": "Headers lacked clickjacking protection, Referrer-Policy and Permissions-Policy as well as CSP/HSTS..", "evidence": "Headers lacked clickjacking protection, Referrer-Policy and Permissions-Policy as well as CSP/HSTS.", "artifacts": [ "evidence/headers.json" ], "suggestedFix": "Add frame-ancestors (or X-Frame-Options), Referrer-Policy and a least-privilege Permissions-Policy with CSP/HSTS.", "effort": "large", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F17", "severity": "low", "confidence": "medium", "principleId": "be-internationalised", "principleCheckId": "lang-dir-and-logical-properties", "guidanceId": "translator", "summary": "The page correctly declares lang=fr-FR and 27 hreflang variants, but CSSOM found zero logical-property signals and 147 physical left/right declarations, weakening writing-mode resilience..", "evidence": "The page correctly declares lang=fr-FR and 27 hreflang variants, but CSSOM found zero logical-property signals and 147 physical left/right declarations, weakening writing-mode resilience.", "artifacts": [ "evidence/platform-probe.json" ], "suggestedFix": "Migrate physical left/right spacing/positioning to logical inline/block properties and test RTL expansion.", "effort": "small", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F18", "severity": "medium", "confidence": "high", "principleId": "be-sustainable", "principleCheckId": "optimised-assets", "guidanceId": "deliver-optimized-decorative-images", "summary": "Although 27 of 30 images were modern formats, 25 below-fold images were eager, 22 lacked responsive srcset, one hero was oversized and three assets used legacy formats..", "evidence": "Although 27 of 30 images were modern formats, 25 below-fold images were eager, 22 lacked responsive srcset, one hero was oversized and three assets used legacy formats.", "artifacts": [ "evidence/images.json" ], "suggestedFix": "Lazy-load below-fold product media, use responsive srcset/sizes and modern formats, and size the hero to its rendered slot.", "effort": "medium", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F19", "severity": "medium", "confidence": "high", "principleId": "be-sustainable", "principleCheckId": "no-wasteful-work", "guidanceId": "efficient-background-processing", "summary": "First load transferred 3.17MB over 144 requests with 73 scripts, while Lighthouse identified 267KiB unused JS and the trace recorded 435ms blocking time..", "evidence": "First load transferred 3.17MB over 144 requests with 73 scripts, while Lighthouse identified 267KiB unused JS and the trace recorded 435ms blocking time.", "artifacts": [ "evidence/home-summary.json" ], "suggestedFix": "Defer and batch telemetry/background work and avoid shipping unused route/consent code on first paint.", "effort": "medium", "pathId": "home", "url": "https://www.vinted.fr/" }, { "id": "F20", "severity": "medium", "confidence": "high", "principleId": "be-sustainable", "principleCheckId": "third-party-and-media-budget", "guidanceId": "deprioritize-background-fetches", "summary": "Twelve non-document origins participated in load.", "evidence": "Twelve non-document origins participated in load; third-party-style asset, consent, metrics, logging and bot-defense services contributed to a 144-request, 3.17MB first visit.", "artifacts": [ "evidence/trackers.json" ], "suggestedFix": "Set a third-party/request budget; delay metrics, logs and optional consent integrations until needed or idle.", "effort": "medium", "pathId": "home", "url": "https://www.vinted.fr/" } ], "taskList": [ { "id": "T01", "title": "Fix first-load performance and main-thread cost", "priority": 1, "findingIds": [ "F07", "F08", "F09", "F10", "F19", "F20" ], "guidanceId": "performance", "status": "open" }, { "id": "T02", "title": "Harden headers and cookies", "priority": 2, "findingIds": [ "F13", "F16" ], "guidanceId": "security", "status": "open" }, { "id": "T03", "title": "Reduce consent and partner privacy footprint", "priority": 3, "findingIds": [ "F04", "F14" ], "guidanceId": "privacy", "status": "open" }, { "id": "T04", "title": "Make images intrinsic, responsive and lazy", "priority": 4, "findingIds": [ "F11", "F18" ], "guidanceId": "optimize-image-priority", "status": "open" }, { "id": "T05", "title": "Use native overlay primitives and avoid stacked interruptions", "priority": 5, "findingIds": [ "F04", "F05" ], "guidanceId": "declarative-dialog-popover-control", "status": "open" }, { "id": "T06", "title": "Add system dark mode", "priority": 6, "findingIds": [ "F01" ], "guidanceId": "dark-mode", "status": "open" }, { "id": "T07", "title": "Offer passkey authentication", "priority": 7, "findingIds": [ "F15" ], "guidanceId": "passkeys", "status": "open" }, { "id": "T08", "title": "Restore browser platform hygiene and BFCache", "priority": 8, "findingIds": [ "F12" ], "guidanceId": "html", "status": "open" }, { "id": "T09", "title": "Adopt component queries and logical CSS", "priority": 9, "findingIds": [ "F06", "F17" ], "guidanceId": "size-aware-styling", "status": "open" }, { "id": "T10", "title": "Add progressive navigation continuity", "priority": 10, "findingIds": [ "F02", "F03" ], "guidanceId": "cross-document-transitions", "status": "open" } ], "budget": { "pathCount": 6, "auditPasses": 1 }, "agent": "pi", "runId": "2026-07-21T07-53-17-389Z" }