{ "url": "https://m.olx.pl", "auditedAt": "2026-07-25T21:35:14.476Z", "mode": "report", "status": "completed", "statusDetail": "Atomic coverage complete. The target intermittently rate-limited automated sessions with CloudFront 403 responses; invalid captures were discarded and each conclusive check uses successful target evidence or a valid applicability judgement.", "page": { "appType": "hybrid", "framework": "React/micro-frontend PWA", "notes": "m.olx.pl canonicalises to www.olx.pl. Public Polish marketplace with SSR content, client hydration, service worker, listings, search, and detail templates." }, "evidenceUsed": [ "screenshot", "dom", "evaluate-probe", "axe-core", "raw-CDP console/network/performance", "PerformanceObserver", "headers", "cookies", "trackers", "secrets", "images", "discoverability", "heap-summary", "robots.txt", "sitemap.xml", "Modern Web Guidance 0.0.172" ], "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", "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" ], "artifacts": [ { "type": "other", "path": "evidence/axe-home.json", "caption": "axe home evidence capture", "findingIds": [ "F11", "F12", "F13", "F22" ] }, { "type": "other", "path": "evidence/comprehensive-probe.json", "caption": "comprehensive probe evidence capture", "findingIds": [ "F01", "F03", "F05", "F13", "F14", "F21" ] }, { "type": "other", "path": "evidence/console-perf.json", "caption": "console perf evidence capture", "findingIds": [ "F06", "F07", "F08", "F09", "F10", "F15", "F17", "F24", "F25" ] }, { "type": "other", "path": "evidence/cookies.json", "caption": "cookies evidence capture", "findingIds": [ "F18" ] }, { "type": "dom", "path": "evidence/detail-dom.json", "caption": "detail dom evidence capture", "findingIds": [] }, { "type": "screenshot", "path": "evidence/detail-mobile.png", "caption": "detail mobile evidence capture", "findingIds": [] }, { "type": "screenshot", "path": "evidence/discoverability-home-crawler.png", "caption": "discoverability home crawler evidence capture", "findingIds": [] }, { "type": "screenshot", "path": "evidence/discoverability-home-rendered.png", "caption": "discoverability home rendered evidence capture", "findingIds": [] }, { "type": "discoverability", "path": "evidence/discoverability-home.json", "caption": "discoverability home evidence capture", "findingIds": [] }, { "type": "other", "path": "evidence/headers.json", "caption": "headers evidence capture", "findingIds": [ "F17", "F18", "F20" ] }, { "type": "heap", "path": "evidence/heap-baseline.heapsnapshot", "caption": "heap baseline evidence capture", "findingIds": [ "F10", "F25" ] }, { "type": "heap", "path": "evidence/heap-post.heapsnapshot", "caption": "heap post evidence capture", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-dark-valid.png", "caption": "home dark valid evidence capture", "findingIds": [ "F01" ] }, { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "home desktop evidence capture", "findingIds": [ "F02", "F04" ] }, { "type": "dom", "path": "evidence/home-dom.json", "caption": "home dom evidence capture", "findingIds": [ "F16", "F22" ] }, { "type": "screenshot", "path": "evidence/home-mobile.png", "caption": "home mobile evidence capture", "findingIds": [ "F02", "F03", "F04", "F19" ] }, { "type": "other", "path": "evidence/images.json", "caption": "images evidence capture", "findingIds": [ "F07", "F09", "F11", "F16", "F23" ] }, { "type": "dom", "path": "evidence/listing-dom.json", "caption": "listing dom evidence capture", "findingIds": [] }, { "type": "screenshot", "path": "evidence/listing-mobile.png", "caption": "listing mobile evidence capture", "findingIds": [] }, { "type": "other", "path": "evidence/preferences-probe.json", "caption": "preferences probe evidence capture", "findingIds": [] }, { "type": "other", "path": "evidence/robots.txt", "caption": "robots evidence capture", "findingIds": [] }, { "type": "dom", "path": "evidence/search-dom.json", "caption": "search dom evidence capture", "findingIds": [] }, { "type": "screenshot", "path": "evidence/search-mobile.png", "caption": "search mobile evidence capture", "findingIds": [] }, { "type": "other", "path": "evidence/secrets.json", "caption": "secrets evidence capture", "findingIds": [] }, { "type": "other", "path": "evidence/sitemap.xml", "caption": "sitemap evidence capture", "findingIds": [] }, { "type": "other", "path": "evidence/trackers.json", "caption": "trackers evidence capture", "findingIds": [ "F19", "F24" ] } ], "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": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The valid dark-mode screenshot remains a light surface, and the CSS probe found zero prefers-color-scheme rules.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-dark-valid.png", "evidence/comprehensive-probe.json" ], "findingIds": [ "F01" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "preferences-probe.json confirms reduced motion removes all active animations and comprehensive-probe.json found four reduced-motion plus eight contrast/forced-colors rules. Outcome for respects-reduced-motion: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/preferences-probe.json" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "preferences-probe.json confirms reduced motion removes all active animations and comprehensive-probe.json found four reduced-motion plus eight contrast/forced-colors rules. Outcome for respects-contrast: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/preferences-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "comprehensive-probe.json found View Transition, scroll-timeline, anchor-positioning, and scroll-snap CSS signals on the live page. Outcome for view-transitions: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/comprehensive-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "comprehensive-probe.json found View Transition, scroll-timeline, anchor-positioning, and scroll-snap CSS signals on the live page. Outcome for scroll-driven-animations: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/comprehensive-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "comprehensive-probe.json found View Transition, scroll-timeline, anchor-positioning, and scroll-snap CSS signals on the live page. Outcome for physical-gestures: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/comprehensive-probe.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "The home/listing screenshots and comprehensive CSS probe show clear search/category orientation plus anchor, scroll-snap, and View Transition support. Outcome for scroll-state-aware-chrome: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/comprehensive-probe.json", "evidence/home-desktop.png" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "The home/listing screenshots and comprehensive CSS probe show clear search/category orientation plus anchor, scroll-snap, and View Transition support. Outcome for anchored-positioning: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/comprehensive-probe.json", "evidence/home-desktop.png" ] }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "The home/listing screenshots and comprehensive CSS probe show clear search/category orientation plus anchor, scroll-snap, and View Transition support. Outcome for directs-attention: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/comprehensive-probe.json", "evidence/home-desktop.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "Mobile and desktop screenshots show a large consent layer over search, categories, and listings before any interaction.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-desktop.png" ], "findingIds": [ "F02" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The live probe found 0 dialog, 0 popover, and 0 details elements while the screenshot shows a modal-like consent layer.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/comprehensive-probe.json" ], "findingIds": [ "F03" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The first desktop viewport contains an app banner, fraud warning, search chrome, and a wide consent panel; mobile content is largely covered.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png" ], "findingIds": [ "F04" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Mobile screenshots show fitted content without visible horizontal clipping; the live probe found container queries and visible 4px focus outline. Outcome for responsive-no-horizontal-scroll: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/comprehensive-probe.json" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Mobile screenshots show fitted content without visible horizontal clipping; the live probe found container queries and visible 4px focus outline. Outcome for component-level-responsiveness: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/comprehensive-probe.json" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The live 390x844 probe found repeated favourite buttons at 22x22 CSS px and multiple links only 18–20px high.", "pathIds": [ "home" ], "artifacts": [ "evidence/comprehensive-probe.json" ], "findingIds": [ "F05" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Home exposes search/categories immediately behind a reversible consent choice; direct search and detail URLs loaded with descriptive titles and content. Outcome for clear-purpose-and-primary-action: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/search-dom.json", "evidence/detail-dom.json" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Home exposes search/categories immediately behind a reversible consent choice; direct search and detail URLs loaded with descriptive titles and content. Outcome for primary-flow-completion: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/search-dom.json", "evidence/detail-dom.json" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Home exposes search/categories immediately behind a reversible consent choice; direct search and detail URLs loaded with descriptive titles and content. Outcome for clear-system-state-and-recovery: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/search-dom.json", "evidence/detail-dom.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "Raw CDP observation measured LCP 1.28s but CLS 0.160, above the 0.10 good threshold, with two long tasks of 123ms and 222ms.", "pathIds": [ "home" ], "artifacts": [ "evidence/console-perf.json" ], "findingIds": [ "F06" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The image probe found 46 of 48 images without width/height; the live layout-shift observer measured CLS 0.160.", "pathIds": [ "home" ], "artifacts": [ "evidence/images.json", "evidence/console-perf.json" ], "findingIds": [ "F07" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The CDP performance observer recorded 123ms and 222ms long tasks; Performance.getMetrics reported 1.02s task time and 0.28s script time in the observed window.", "pathIds": [ "home" ], "artifacts": [ "evidence/console-perf.json" ], "findingIds": [ "F08" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The valid CDP run recorded 215 Resource Timing entries; the image probe found all 48 images without loading=lazy and 25 legacy-format images.", "pathIds": [ "home" ], "artifacts": [ "evidence/console-perf.json", "evidence/images.json" ], "findingIds": [ "F09" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The page loaded 215 resources, retained about 72MB JS heap, and logged several unsatisfied shared-singleton version warnings.", "pathIds": [ "home" ], "artifacts": [ "evidence/console-perf.json", "evidence/heap-baseline.heapsnapshot" ], "findingIds": [ "F10" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "axe reported a critical image-alt violation; the image probe counted 30 images without alt attributes.", "pathIds": [ "home" ], "artifacts": [ "evidence/axe-home.json", "evidence/images.json" ], "findingIds": [ "F11" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "axe measured 2.8:1 contrast for 12px #7f9799 text on #f2f4f5 across OLX network links, below 4.5:1.", "pathIds": [ "home" ], "artifacts": [ "evidence/axe-home.json" ], "findingIds": [ "F12" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The probe found no main or nav landmark and no H1; axe reported invalid H4 heading order and content outside landmarks.", "pathIds": [ "home" ], "artifacts": [ "evidence/comprehensive-probe.json", "evidence/axe-home.json" ], "findingIds": [ "F13" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "axe-home.json plus focus, target-size, structure, image, and mobile screenshot probes provided direct accessibility evidence. Outcome for legible-text: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/axe-home.json", "evidence/comprehensive-probe.json" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "At the mobile condition, favourite controls measured 22x22 CSS px and many category links were only 20px high, despite a valid scalable viewport.", "pathIds": [ "home" ], "artifacts": [ "evidence/comprehensive-probe.json" ], "findingIds": [ "F14" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The CDP console probe captured one CSP-blocked data: video error plus 13 Permissions-Policy and shared-module-version warnings.", "pathIds": [ "home" ], "artifacts": [ "evidence/console-perf.json" ], "findingIds": [ "F15" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "Although charset and viewport are valid, 46 of 48 images omit dimensions and 25 use legacy formats.", "pathIds": [ "home" ], "artifacts": [ "evidence/images.json", "evidence/home-dom.json" ], "findingIds": [ "F16" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "CDP logged unrecognized ambient-light-sensor, battery, document-domain, execution-while-not-rendered, execution-while-out-of-viewport, navigation-override, and web-share features.", "pathIds": [ "home" ], "artifacts": [ "evidence/console-perf.json", "evidence/headers.json" ], "findingIds": [ "F17" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Unique titles/descriptions/canonicals were present; robots and sitemap were reachable; discoverability showed 75% raw-content coverage, non-shell SSR, and JSON-LD. Outcome for title-and-description: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/discoverability-home.json", "evidence/robots.txt", "evidence/sitemap.xml" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Unique titles/descriptions/canonicals were present; robots and sitemap were reachable; discoverability showed 75% raw-content coverage, non-shell SSR, and JSON-LD. Outcome for crawlable-and-mobile-friendly: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/discoverability-home.json", "evidence/robots.txt", "evidence/sitemap.xml" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Unique titles/descriptions/canonicals were present; robots and sitemap were reachable; discoverability showed 75% raw-content coverage, non-shell SSR, and JSON-LD. Outcome for canonical-and-indexing-signals: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/discoverability-home.json", "evidence/robots.txt", "evidence/sitemap.xml" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Unique titles/descriptions/canonicals were present; robots and sitemap were reachable; discoverability showed 75% raw-content coverage, non-shell SSR, and JSON-LD. Outcome for structured-and-shareable-metadata: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/discoverability-home.json", "evidence/robots.txt", "evidence/sitemap.xml" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "headers found script-src allowing unsafe-inline and unsafe-eval; cookies found deviceGUID and OptanonConsent without Secure, with deviceGUID SameSite=None and 400-day expiry.", "pathIds": [ "home" ], "artifacts": [ "evidence/headers.json", "evidence/cookies.json" ], "findingIds": [ "F18" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The tracker capture found 28 third-party origins and five known tracker domains, including DoubleClick, New Relic, and Sentry.", "pathIds": [ "home" ], "artifacts": [ "evidence/trackers.json", "evidence/home-mobile.png" ], "findingIds": [ "F19" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "headers, cookies, trackers, secrets, and runtime permission/auth surface probes supplied direct evidence; no exposed secrets were found. Outcome for in-context-permissions-and-modern-auth: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/secrets.json", "evidence/headers.json" ] }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "HSTS, nosniff, SAMEORIGIN and Referrer-Policy are present, but CSP allows * plus unsafe-inline/unsafe-eval and Permissions-Policy allows camera/geolocation/payment broadly.", "pathIds": [ "home" ], "artifacts": [ "evidence/headers.json" ], "findingIds": [ "F20" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "discoverability showed 75% content without JS and a non-shell response; service worker state and runtime behavior were inspected. Outcome for progressive-enhancement: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/discoverability-home.json", "evidence/comprehensive-probe.json" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "discoverability showed 75% content without JS and a non-shell response; service worker state and runtime behavior were inspected. Outcome for resilient-runtime-behaviour: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/discoverability-home.json", "evidence/comprehensive-probe.json" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The live probe found an active service-worker controller and mobile-app meta, but no link rel=manifest.", "pathIds": [ "home" ], "artifacts": [ "evidence/comprehensive-probe.json" ], "findingIds": [ "F21" ] }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "discoverability showed 75% content without JS and a non-shell response; service worker state and runtime behavior were inspected. Outcome for network-and-http-failure-states: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/discoverability-home.json", "evidence/comprehensive-probe.json" ] }, { "principleId": "be-internationalised", "checkId": "lang-dir-and-logical-properties", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "Both the DOM primitive and axe show an empty html lang attribute; axe rates html-has-lang serious.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-dom.json", "evidence/axe-home.json" ], "findingIds": [ "F22" ] }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Rendered Polish currency/content, DOM language attributes, and logical-property CSS signals were inspected. Outcome for locale-aware-data: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/comprehensive-probe.json" ] }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative route and flow recon.", "evidence": "No scheduling, recurring events, or user-visible absolute times occur on the audited marketplace surfaces.", "reason": "No scheduling, recurring events, or user-visible absolute times occur on the audited marketplace surfaces." }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Consent presentation, public search inputs, prices, and task path were reviewed for deception and assistance. Outcome for no-dark-patterns: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/comprehensive-probe.json" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative route and flow recon.", "evidence": "The representative public search flow has no required-field submission or validation error state; no applicable form error was triggered.", "reason": "The representative public search flow has no required-field submission or validation error state; no applicable form error was triggered." }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Consent presentation, public search inputs, prices, and task path were reviewed for deception and assistance. Outcome for trustworthy-input-assistance: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/comprehensive-probe.json" ] }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative route and flow recon.", "evidence": "The audited public browse/search/detail journey does not include checkout, subscription, or an authenticated account-management action.", "reason": "The audited public browse/search/detail journey does not include checkout, subscription, or an authenticated account-management action." }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The image probe found 25 legacy-format images, 48 below-fold images not lazy-loaded, 46 without dimensions, and one oversized asset.", "pathIds": [ "home" ], "artifacts": [ "evidence/images.json" ], "findingIds": [ "F23" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "images, trackers, heap, resource count, and screenshots supplied direct asset/background/media evidence. Outcome for no-wasteful-work: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/images.json", "evidence/trackers.json" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "The tracker probe observed 28 third-party origins; the runtime loaded 215 resources before a user started a search.", "pathIds": [ "home" ], "artifacts": [ "evidence/trackers.json", "evidence/console-perf.json" ], "findingIds": [ "F24" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative route and flow recon.", "evidence": "No declared agent-facing surface or WebMCP capability was present; this emerging capability is optional for this run.", "reason": "No declared agent-facing surface or WebMCP capability was present; this emerging capability is optional for this run." }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative route and flow recon.", "evidence": "No summarisation or language-model task is part of the representative marketplace journeys, so on-device inference is not applicable.", "reason": "No summarisation or language-model task is part of the representative marketplace journeys, so on-device inference is not applicable." }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Baseline/post heap summaries and CDP memory/listener metrics directly measured footprint and repeated-scroll growth. Outcome for no-leak-under-repeated-interaction: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.heapsnapshot", "evidence/heap-post.heapsnapshot" ] }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "status": "issues", "confidence": "high", "method": "Direct visual/CDP/DOM evidence matched to this atomic check.", "evidence": "Heap summary measured 64.1MB self size across 1.18M heap nodes; CDP reported 72.0MB used JS heap and 3,888 event listeners.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.heapsnapshot", "evidence/console-perf.json" ], "findingIds": [ "F25" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "status": "pass", "confidence": "medium", "method": "Direct visual, rendered-DOM, CSS-signal, or CDP probe for the check condition.", "evidence": "Baseline/post heap summaries and CDP memory/listener metrics directly measured footprint and repeated-scroll growth. Outcome for no-detached-dom-or-unbounded-listeners: no divergence was observed in the directly inspected condition.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.heapsnapshot", "evidence/heap-post.heapsnapshot" ] } ], "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F01" ] }, { "principleId": "implement-natural-interactions", "expectation": "default", "status": "pass" }, { "principleId": "provide-guided-navigation", "expectation": "default", "status": "pass" }, { "principleId": "maximize-content-reduce-noise", "expectation": "default", "status": "issues", "findingIds": [ "F02", "F03", "F04" ] }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "issues", "findingIds": [ "F05" ] }, { "principleId": "support-core-task-success", "expectation": "default", "status": "pass" }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F06", "F07", "F08", "F09", "F10" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "issues", "findingIds": [ "F11", "F12", "F13", "F14" ] }, { "principleId": "follow-best-practices", "expectation": "default", "status": "issues", "findingIds": [ "F15", "F16", "F17" ] }, { "principleId": "be-discoverable", "expectation": "default", "status": "pass" }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F18", "F19", "F20" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "issues", "findingIds": [ "F21" ] }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "issues", "findingIds": [ "F22" ] }, { "principleId": "be-trustworthy", "expectation": "default", "status": "pass" }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F23", "F24" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "not-applicable", "reason": "All checks were judged not applicable for the representative public marketplace surfaces." }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "issues", "findingIds": [ "F25" ] } ], "paths": [ { "id": "home", "description": "Marketplace home and primary search/category entry point; representative global shell and consent experience.", "url": "https://m.olx.pl/", "conditions": [ "mobile 390x844", "desktop 1440x1000", "prefers-color-scheme: dark", "prefers-reduced-motion: reduce", "keyboard focus" ], "result": "issues" }, { "id": "listing", "description": "Electronics category listing; representative browse/results template.", "url": "https://m.olx.pl/elektronika/", "conditions": [ "mobile 390x844" ], "result": "issues" }, { "id": "search", "description": "Direct search results for “rower”; representative primary search journey.", "url": "https://m.olx.pl/oferty/q-rower/", "conditions": [ "mobile 390x844" ], "result": "issues" }, { "id": "detail", "description": "Representative product/detail listing reached from the home recommendations.", "url": "https://m.olx.pl/d/oferta/nike-mind-001-slide-light-smoke-grey-r-45-CID87-ID1bAOCk.html", "conditions": [ "mobile 390x844" ], "result": "issues" } ], "findings": [ { "id": "F01", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "respect-user-preferences", "principleCheckId": "respects-color-scheme", "guidanceId": "dark-mode", "severity": "medium", "confidence": "high", "summary": "The interface ignores the user’s dark colour-scheme preference.", "evidence": "The valid dark-mode screenshot remains a light surface, and the CSS probe found zero prefers-color-scheme rules.", "artifacts": [ "evidence/home-dark-valid.png", "evidence/comprehensive-probe.json" ], "suggestedFix": "Add color-scheme: light dark and theme surfaces with prefers-color-scheme or light-dark().", "effort": "small" }, { "id": "F02", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "maximize-content-reduce-noise", "principleCheckId": "no-intrusive-interruptions", "guidanceId": "light-dismiss-a-dialog", "severity": "high", "confidence": "high", "summary": "The consent layer obscures the primary marketplace content on first load.", "evidence": "Mobile and desktop screenshots show a large consent layer over search, categories, and listings before any interaction.", "artifacts": [ "evidence/home-mobile.png", "evidence/home-desktop.png" ], "suggestedFix": "Replace the blocking wall with a compact, content-preserving consent surface while retaining equally easy essential-only choice.", "effort": "medium" }, { "id": "F03", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "maximize-content-reduce-noise", "principleCheckId": "semantic-dismissible-primitives", "guidanceId": "declarative-dialog-popover-control", "severity": "medium", "confidence": "high", "summary": "The consent overlay is custom rather than a semantic dialog.", "evidence": "The live probe found 0 dialog, 0 popover, and 0 details elements while the screenshot shows a modal-like consent layer.", "artifacts": [ "evidence/home-mobile.png", "evidence/comprehensive-probe.json" ], "suggestedFix": "Use a native dialog for modal consent, with correct focus management and platform dismissal semantics.", "effort": "medium" }, { "id": "F04", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "maximize-content-reduce-noise", "principleCheckId": "reduced-chrome", "guidanceId": "defer-rendering-heavy-content", "severity": "medium", "confidence": "high", "summary": "Persistent app, safety, and consent chrome crowds the content.", "evidence": "The first desktop viewport contains an app banner, fraud warning, search chrome, and a wide consent panel; mobile content is largely covered.", "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png" ], "suggestedFix": "Consolidate non-content banners, reserve persistent chrome for essential actions, and let listings dominate the first viewport.", "effort": "medium" }, { "id": "F05", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "adapt-to-the-form-factor", "principleCheckId": "input-modality-aware", "guidanceId": "accessibility", "severity": "high", "confidence": "high", "summary": "Many interactive targets are too small for reliable touch.", "evidence": "The live 390x844 probe found repeated favourite buttons at 22x22 CSS px and multiple links only 18–20px high.", "artifacts": [ "evidence/comprehensive-probe.json" ], "suggestedFix": "Expand hit areas to at least 24x24 CSS px, preferably 44x44 for primary touch controls, without enlarging icons visually.", "effort": "small" }, { "id": "F06", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "severity": "high", "confidence": "high", "summary": "Layout stability misses the good Core Web Vitals range.", "evidence": "Raw CDP observation measured LCP 1.28s but CLS 0.160, above the 0.10 good threshold, with two long tasks of 123ms and 222ms.", "artifacts": [ "evidence/console-perf.json" ], "suggestedFix": "Reserve late content space and break up long tasks; verify field INP and CLS after deployment.", "effort": "medium" }, { "id": "F07", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-fast-and-stable", "principleCheckId": "visual-stability", "guidanceId": "optimize-image-priority", "severity": "high", "confidence": "high", "summary": "Images commonly lack intrinsic dimensions, increasing shift risk.", "evidence": "The image probe found 46 of 48 images without width/height; the live layout-shift observer measured CLS 0.160.", "artifacts": [ "evidence/images.json", "evidence/console-perf.json" ], "suggestedFix": "Set width and height or aspect-ratio on every image/card media slot before content arrives.", "effort": "small" }, { "id": "F08", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-main-thread", "guidanceId": "schedule-tasks-by-priority", "severity": "medium", "confidence": "high", "summary": "Long main-thread tasks delay responsiveness after load.", "evidence": "The CDP performance observer recorded 123ms and 222ms long tasks; Performance.getMetrics reported 1.02s task time and 0.28s script time in the observed window.", "artifacts": [ "evidence/console-perf.json" ], "suggestedFix": "Profile the long-task scripts, split work into sub-50ms tasks, and schedule non-critical work by priority.", "effort": "medium" }, { "id": "F09", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-resource-delivery", "guidanceId": "defer-rendering-heavy-content", "severity": "medium", "confidence": "high", "summary": "The home page performs a broad, eager resource load.", "evidence": "The valid CDP run recorded 215 Resource Timing entries; the image probe found all 48 images without loading=lazy and 25 legacy-format images.", "artifacts": [ "evidence/console-perf.json", "evidence/images.json" ], "suggestedFix": "Lazy-load below-fold media, reduce early connection/resource fan-out, and deliver modern responsive image variants.", "effort": "medium" }, { "id": "F10", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-fast-and-stable", "principleCheckId": "trim-unused-and-duplicate-code", "guidanceId": "identify-heavy-scripts", "severity": "medium", "confidence": "high", "summary": "The initial runtime and dependency surface is unusually large.", "evidence": "The page loaded 215 resources, retained about 72MB JS heap, and logged several unsatisfied shared-singleton version warnings.", "artifacts": [ "evidence/console-perf.json", "evidence/heap-baseline.heapsnapshot" ], "suggestedFix": "Audit bundle federation/version duplication, remove unused chunks, and conditionally load secondary analytics, ads, and account features.", "effort": "large" }, { "id": "F11", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-inclusive", "principleCheckId": "names-roles-labels", "guidanceId": "accessibility", "severity": "high", "confidence": "high", "summary": "Some images have no accessible alternative.", "evidence": "axe reported a critical image-alt violation; the image probe counted 30 images without alt attributes.", "artifacts": [ "evidence/axe-home.json", "evidence/images.json" ], "suggestedFix": "Give meaningful images concise alt text and mark decorative images alt=\"\" or role=\"presentation\".", "effort": "small" }, { "id": "F12", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-inclusive", "principleCheckId": "sufficient-contrast", "guidanceId": "accessibility", "severity": "medium", "confidence": "high", "summary": "Footer link text fails WCAG AA contrast.", "evidence": "axe measured 2.8:1 contrast for 12px #7f9799 text on #f2f4f5 across OLX network links, below 4.5:1.", "artifacts": [ "evidence/axe-home.json" ], "suggestedFix": "Use a darker text token that reaches at least 4.5:1 for normal text.", "effort": "small" }, { "id": "F13", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-inclusive", "principleCheckId": "structure-and-focus", "guidanceId": "html", "severity": "high", "confidence": "high", "summary": "The page lacks a coherent landmark and heading hierarchy.", "evidence": "The probe found no main or nav landmark and no H1; axe reported invalid H4 heading order and content outside landmarks.", "artifacts": [ "evidence/comprehensive-probe.json", "evidence/axe-home.json" ], "suggestedFix": "Add one descriptive H1, wrap primary content in main, use nav landmarks, and keep heading levels sequential.", "effort": "medium" }, { "id": "F14", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-inclusive", "principleCheckId": "zoom-reflow-targets-and-media", "guidanceId": "fluid-scaling", "severity": "medium", "confidence": "high", "summary": "Small controls weaken zoomed and touch use.", "evidence": "At the mobile condition, favourite controls measured 22x22 CSS px and many category links were only 20px high, despite a valid scalable viewport.", "artifacts": [ "evidence/comprehensive-probe.json" ], "suggestedFix": "Increase interactive hit areas and retest at 200% zoom and narrow reflow.", "effort": "small" }, { "id": "F15", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "follow-best-practices", "principleCheckId": "no-console-errors", "guidanceId": "html", "severity": "low", "confidence": "high", "summary": "The page emits a CSP media error and numerous platform warnings.", "evidence": "The CDP console probe captured one CSP-blocked data: video error plus 13 Permissions-Policy and shared-module-version warnings.", "artifacts": [ "evidence/console-perf.json" ], "suggestedFix": "Remove the blocked probe/media load, update obsolete Permissions-Policy directives, and align shared module versions.", "effort": "small" }, { "id": "F16", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "follow-best-practices", "principleCheckId": "sound-document-and-assets", "guidanceId": "html", "severity": "medium", "confidence": "high", "summary": "Image asset markup is incomplete and inefficient.", "evidence": "Although charset and viewport are valid, 46 of 48 images omit dimensions and 25 use legacy formats.", "artifacts": [ "evidence/images.json", "evidence/home-dom.json" ], "suggestedFix": "Emit intrinsic image dimensions and responsive modern sources from the rendering layer.", "effort": "medium" }, { "id": "F17", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "follow-best-practices", "principleCheckId": "browser-platform-hygiene", "guidanceId": "security", "severity": "low", "confidence": "high", "summary": "Permissions-Policy contains directives this Chrome build rejects.", "evidence": "CDP logged unrecognized ambient-light-sensor, battery, document-domain, execution-while-not-rendered, execution-while-out-of-viewport, navigation-override, and web-share features.", "artifacts": [ "evidence/console-perf.json", "evidence/headers.json" ], "suggestedFix": "Generate Permissions-Policy from currently supported directives and remove stale entries.", "effort": "small" }, { "id": "F18", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-private-and-secure", "principleCheckId": "secure-transport-and-headers", "guidanceId": "security", "severity": "high", "confidence": "high", "summary": "The CSP is permissive and two first-party cookies lack Secure.", "evidence": "headers found script-src allowing unsafe-inline and unsafe-eval; cookies found deviceGUID and OptanonConsent without Secure, with deviceGUID SameSite=None and 400-day expiry.", "artifacts": [ "evidence/headers.json", "evidence/cookies.json" ], "suggestedFix": "Adopt nonce/hash-based CSP without unsafe-eval and mark all HTTPS cookies Secure with the narrowest SameSite policy.", "effort": "medium" }, { "id": "F19", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-private-and-secure", "principleCheckId": "data-minimisation-and-third-parties", "guidanceId": "privacy", "severity": "high", "confidence": "high", "summary": "The first-load third-party and tracking footprint is extensive.", "evidence": "The tracker capture found 28 third-party origins and five known tracker domains, including DoubleClick, New Relic, and Sentry.", "artifacts": [ "evidence/trackers.json", "evidence/home-mobile.png" ], "suggestedFix": "Gate non-essential vendors behind consent, remove low-value trackers, and batch/minimise analytics payloads.", "effort": "large" }, { "id": "F20", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-private-and-secure", "principleCheckId": "defensive-browser-policies", "guidanceId": "security", "severity": "medium", "confidence": "high", "summary": "Browser defenses exist but are weakened by broad policy.", "evidence": "HSTS, nosniff, SAMEORIGIN and Referrer-Policy are present, but CSP allows * plus unsafe-inline/unsafe-eval and Permissions-Policy allows camera/geolocation/payment broadly.", "artifacts": [ "evidence/headers.json" ], "suggestedFix": "Narrow CSP sources and Permissions-Policy capabilities to the origins and features actually required.", "effort": "medium" }, { "id": "F21", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-resilient", "principleCheckId": "offline-and-installable", "guidanceId": "performance", "severity": "low", "confidence": "high", "summary": "The app-like marketplace is controlled by a service worker but exposes no manifest link.", "evidence": "The live probe found an active service-worker controller and mobile-app meta, but no link rel=manifest.", "artifacts": [ "evidence/comprehensive-probe.json" ], "suggestedFix": "Publish a complete web app manifest and verify an intentional offline fallback for browse/detail routes.", "effort": "medium" }, { "id": "F22", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-internationalised", "principleCheckId": "lang-dir-and-logical-properties", "guidanceId": "translator", "severity": "high", "confidence": "high", "summary": "The Polish document does not declare its language.", "evidence": "Both the DOM primitive and axe show an empty html lang attribute; axe rates html-has-lang serious.", "artifacts": [ "evidence/home-dom.json", "evidence/axe-home.json" ], "suggestedFix": "Set server-side and set dir explicitly when supporting bidirectional locales.", "effort": "trivial" }, { "id": "F23", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-sustainable", "principleCheckId": "optimised-assets", "guidanceId": "deliver-optimized-decorative-images", "severity": "medium", "confidence": "high", "summary": "Below-fold image delivery is not resource-efficient.", "evidence": "The image probe found 25 legacy-format images, 48 below-fold images not lazy-loaded, 46 without dimensions, and one oversized asset.", "artifacts": [ "evidence/images.json" ], "suggestedFix": "Serve AVIF/WebP responsive variants and lazy-load below-fold images with fixed intrinsic geometry.", "effort": "medium" }, { "id": "F24", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-sustainable", "principleCheckId": "third-party-and-media-budget", "guidanceId": "deprioritize-background-fetches", "severity": "high", "confidence": "high", "summary": "Third-party scripts are disproportionate to the first-load task.", "evidence": "The tracker probe observed 28 third-party origins; the runtime loaded 215 resources before a user started a search.", "artifacts": [ "evidence/trackers.json", "evidence/console-perf.json" ], "suggestedFix": "Set a third-party request/byte budget and defer ads, surveys, analytics, and monitoring until needed and consented.", "effort": "large" }, { "id": "F25", "pathId": "home", "url": "https://www.olx.pl/", "principleId": "be-memory-efficient", "principleCheckId": "bounded-footprint", "guidanceId": "defer-rendering-heavy-content", "severity": "medium", "confidence": "high", "summary": "The home page has a heavy baseline memory footprint.", "evidence": "Heap summary measured 64.1MB self size across 1.18M heap nodes; CDP reported 72.0MB used JS heap and 3,888 event listeners.", "artifacts": [ "evidence/heap-baseline.heapsnapshot", "evidence/console-perf.json" ], "suggestedFix": "Reduce eagerly mounted modules/listeners and lazy-initialize secondary widgets; track heap and listener budgets in CI.", "effort": "large" } ], "taskList": [ { "id": "T01", "title": "The consent layer obscures the primary marketplace content on first load.", "priority": 1, "findingIds": [ "F02" ], "guidanceId": "light-dismiss-a-dialog", "status": "open" }, { "id": "T02", "title": "Many interactive targets are too small for reliable touch.", "priority": 2, "findingIds": [ "F05" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T03", "title": "Layout stability misses the good Core Web Vitals range.", "priority": 3, "findingIds": [ "F06" ], "guidanceId": "performance", "status": "open" }, { "id": "T04", "title": "Images commonly lack intrinsic dimensions, increasing shift risk.", "priority": 4, "findingIds": [ "F07" ], "guidanceId": "optimize-image-priority", "status": "open" }, { "id": "T05", "title": "Some images have no accessible alternative.", "priority": 5, "findingIds": [ "F11" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T06", "title": "The page lacks a coherent landmark and heading hierarchy.", "priority": 6, "findingIds": [ "F13" ], "guidanceId": "html", "status": "open" }, { "id": "T07", "title": "The CSP is permissive and two first-party cookies lack Secure.", "priority": 7, "findingIds": [ "F18" ], "guidanceId": "security", "status": "open" }, { "id": "T08", "title": "The first-load third-party and tracking footprint is extensive.", "priority": 8, "findingIds": [ "F19" ], "guidanceId": "privacy", "status": "open" }, { "id": "T09", "title": "The Polish document does not declare its language.", "priority": 9, "findingIds": [ "F22" ], "guidanceId": "translator", "status": "open" }, { "id": "T10", "title": "Third-party scripts are disproportionate to the first-load task.", "priority": 10, "findingIds": [ "F24" ], "guidanceId": "deprioritize-background-fetches", "status": "open" }, { "id": "T11", "title": "The interface ignores the user’s dark colour-scheme preference.", "priority": 11, "findingIds": [ "F01" ], "guidanceId": "dark-mode", "status": "open" }, { "id": "T12", "title": "The consent overlay is custom rather than a semantic dialog.", "priority": 12, "findingIds": [ "F03" ], "guidanceId": "declarative-dialog-popover-control", "status": "open" }, { "id": "T13", "title": "Persistent app, safety, and consent chrome crowds the content.", "priority": 13, "findingIds": [ "F04" ], "guidanceId": "defer-rendering-heavy-content", "status": "open" }, { "id": "T14", "title": "Long main-thread tasks delay responsiveness after load.", "priority": 14, "findingIds": [ "F08" ], "guidanceId": "schedule-tasks-by-priority", "status": "open" }, { "id": "T15", "title": "The home page performs a broad, eager resource load.", "priority": 15, "findingIds": [ "F09" ], "guidanceId": "defer-rendering-heavy-content", "status": "open" }, { "id": "T16", "title": "The initial runtime and dependency surface is unusually large.", "priority": 16, "findingIds": [ "F10" ], "guidanceId": "identify-heavy-scripts", "status": "open" }, { "id": "T17", "title": "Footer link text fails WCAG AA contrast.", "priority": 17, "findingIds": [ "F12" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T18", "title": "Small controls weaken zoomed and touch use.", "priority": 18, "findingIds": [ "F14" ], "guidanceId": "fluid-scaling", "status": "open" }, { "id": "T19", "title": "Image asset markup is incomplete and inefficient.", "priority": 19, "findingIds": [ "F16" ], "guidanceId": "html", "status": "open" }, { "id": "T20", "title": "Browser defenses exist but are weakened by broad policy.", "priority": 20, "findingIds": [ "F20" ], "guidanceId": "security", "status": "open" }, { "id": "T21", "title": "Below-fold image delivery is not resource-efficient.", "priority": 21, "findingIds": [ "F23" ], "guidanceId": "deliver-optimized-decorative-images", "status": "open" }, { "id": "T22", "title": "The home page has a heavy baseline memory footprint.", "priority": 22, "findingIds": [ "F25" ], "guidanceId": "defer-rendering-heavy-content", "status": "open" }, { "id": "T23", "title": "The page emits a CSP media error and numerous platform warnings.", "priority": 23, "findingIds": [ "F15" ], "guidanceId": "html", "status": "open" }, { "id": "T24", "title": "Permissions-Policy contains directives this Chrome build rejects.", "priority": 24, "findingIds": [ "F17" ], "guidanceId": "security", "status": "open" }, { "id": "T25", "title": "The app-like marketplace is controlled by a service worker but exposes no manifest link.", "priority": 25, "findingIds": [ "F21" ], "guidanceId": "performance", "status": "open" } ], "budget": { "pathCount": 4, "auditPasses": 1 }, "agent": "pi", "runId": "2026-07-25T21-35-14-476Z" }