{ "url": "https://www.bing.com", "auditedAt": "2026-07-21T02:00:52.738Z", "mode": "report", "status": "completed", "statusDetail": "Coverage complete. Representative web, image, news, mobile, preference, security, performance, no-JS, error and memory conditions were judged.", "page": { "appType": "hybrid", "framework": "Microsoft server-rendered/JavaScript-enhanced search surfaces", "notes": "Public search homepage with distinct web, image and news result templates. Search-result DOM capture intermittently exposed a bot-challenge shell, but visual result capture succeeded." }, "evidenceUsed": [ "screenshot", "dom", "evaluate-probe", "layout-metrics", "trace", "har", "lighthouse", "discoverability", "headers", "cookies", "trackers", "secrets", "images", "heap-summary", "robots.txt", "modern-web-guidance" ], "guidanceConsulted": [ "accessibility", "dark-mode", "same-document-transitions", "scrollytelling", "shrinking-header-on-scroll", "position-aware-tooltips", "light-dismiss-a-dialog", "declarative-dialog-popover-control", "size-aware-styling", "forms", "performance", "optimize-image-priority", "break-up-long-tasks", "improve-text-layout-and-legibility", "html", "security", "privacy", "passkeys", "stabilize-reactive-state", "translator", "support-global-calendar-systems", "validate-input-after-interaction", "deliver-optimized-decorative-images", "efficient-background-processing", "webmcp", "agentic-forms", "language-model", "manage-recurring-intervals" ], "artifacts": [ { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "Homepage at 1440x1000", "condition": "desktop", "findingIds": [ "F-01", "F-05", "F-06", "F-09", "F-27" ] }, { "type": "screenshot", "path": "evidence/home-mobile.png", "caption": "Homepage at 360x800 showing horizontal clipping", "condition": "viewport: 360x800", "findingIds": [ "F-11", "F-12" ] }, { "type": "screenshot", "path": "evidence/home-dark.png", "caption": "Homepage under dark preference", "condition": "prefers-color-scheme: dark", "findingIds": [ "F-01" ] }, { "type": "screenshot", "path": "evidence/home-forced-colors.png", "caption": "Homepage under forced colors and increased contrast", "condition": "forced-colors: active, prefers-contrast: more", "findingIds": [] }, { "type": "layout", "path": "evidence/home-mobile-layout.json", "caption": "Homepage narrow-viewport layout metrics", "condition": "viewport: 360x800", "findingIds": [ "F-11", "F-12", "F-20", "F-22" ] }, { "type": "layout", "path": "evidence/search-mobile-layout.json", "caption": "Search-result narrow-viewport metrics", "condition": "viewport: 360x800", "findingIds": [] }, { "type": "screenshot", "path": "evidence/search-results.png", "caption": "Representative web search results", "condition": "desktop", "findingIds": [ "F-03", "F-08" ] }, { "type": "screenshot", "path": "evidence/images-results.png", "caption": "Representative image search results", "condition": "desktop", "findingIds": [ "F-03", "F-04", "F-08", "F-09" ] }, { "type": "screenshot", "path": "evidence/news-results.png", "caption": "Representative news search results", "condition": "desktop", "findingIds": [ "F-04", "F-05", "F-06", "F-08" ] }, { "type": "screenshot", "path": "evidence/error-404.png", "caption": "Deliberately invalid route response", "condition": "desktop", "findingIds": [ "F-14", "F-30" ] }, { "type": "dom", "path": "evidence/home-dom.json", "caption": "Homepage DOM and computed styles", "condition": "default", "findingIds": [ "F-01", "F-07", "F-12" ] }, { "type": "dom", "path": "evidence/search-dom.json", "caption": "Search results DOM and computed styles", "condition": "default", "findingIds": [] }, { "type": "other", "path": "evidence/home-quality-probe.json", "caption": "Metadata, semantics, focus and target probe", "condition": "keyboard focus", "findingIds": [ "F-07", "F-10", "F-13", "F-18", "F-19", "F-20", "F-21", "F-24", "F-25" ] }, { "type": "other", "path": "evidence/preferences-motion.json", "caption": "Reduced-motion animation and modern CSS probe", "condition": "prefers-reduced-motion: reduce", "findingIds": [ "F-02", "F-03", "F-04" ] }, { "type": "trace", "path": "evidence/home-trace", "caption": "DevTools performance trace", "condition": "load", "findingIds": [] }, { "type": "trace-summary", "path": "evidence/home-trace-summary.json", "caption": "Compact performance trace summary", "condition": "load", "findingIds": [ "F-15" ] }, { "type": "har", "path": "evidence/home-network", "caption": "Network HAR", "condition": "load", "findingIds": [] }, { "type": "har-summary", "path": "evidence/home-network-summary.json", "caption": "Compact network summary", "condition": "load", "findingIds": [ "F-16", "F-17", "F-27", "F-31", "F-32" ] }, { "type": "lighthouse", "path": "evidence/lighthouse-home.json", "caption": "Lighthouse JSON", "condition": "mobile throttling", "findingIds": [] }, { "type": "other", "path": "evidence/lighthouse-summary.json", "caption": "Compact Lighthouse summary", "condition": "mobile throttling", "findingIds": [ "F-10", "F-15", "F-16", "F-17", "F-18", "F-19", "F-20", "F-21", "F-23", "F-24", "F-33" ] }, { "type": "other", "path": "evidence/headers.json", "caption": "Security response header audit", "condition": "load", "findingIds": [ "F-26", "F-28" ] }, { "type": "other", "path": "evidence/cookies.json", "caption": "Cookie audit", "condition": "load", "findingIds": [ "F-26" ] }, { "type": "other", "path": "evidence/trackers.json", "caption": "Third-party origin/tracker audit", "condition": "load", "findingIds": [ "F-27", "F-32" ] }, { "type": "other", "path": "evidence/secrets.json", "caption": "Client secret scan; generic match not treated as a secret without corroboration", "condition": "load", "findingIds": [] }, { "type": "other", "path": "evidence/images-audit.json", "caption": "Image delivery/accessibility audit", "condition": "load", "findingIds": [ "F-18", "F-22", "F-31" ] }, { "type": "discoverability", "path": "evidence/discoverability", "caption": "Raw HTML vs rendered discoverability result", "condition": "JavaScript/no-JavaScript", "findingIds": [ "F-29", "F-33" ] }, { "type": "screenshot", "path": "evidence/discoverability-rendered.png", "caption": "Browser-rendered discoverability view", "condition": "JavaScript enabled", "findingIds": [ "F-09", "F-29" ] }, { "type": "screenshot", "path": "evidence/discoverability-crawler.png", "caption": "Crawler discoverability view", "condition": "JavaScript disabled", "findingIds": [ "F-29" ] }, { "type": "heap", "path": "evidence/heap-baseline", "caption": "Baseline heap summary", "condition": "baseline", "findingIds": [ "F-34", "F-36" ] }, { "type": "heap", "path": "evidence/heap-post-valid", "caption": "Heap summary after ten query edit cycles", "condition": "post interaction", "findingIds": [ "F-34", "F-35", "F-36" ] }, { "type": "other", "path": "evidence/robots.json", "caption": "robots.txt capture", "condition": "crawler policy", "findingIds": [ "F-24" ] } ], "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": "visual/emulated-media", "evidence": "The dark-preference capture keeps the same white search and consent surfaces as the default capture; computed color-scheme is normal and the CSS probe found no prefers-color-scheme theming rule.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-dark.png", "evidence/home-dom.json" ], "findingIds": [ "F-01" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "status": "issues", "confidence": "high", "method": "visual/emulated-media", "evidence": "Under prefers-reduced-motion: reduce, getAnimations() still reported a running slide-up animation with a 2000 ms duration, and no reduced-motion rule was found.", "pathIds": [ "home" ], "artifacts": [ "evidence/preferences-motion.json" ], "findingIds": [ "F-02" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "status": "pass", "confidence": "medium", "method": "visual/emulated-media", "evidence": "respects-contrast: Desktop, dark-preference and forced-colors captures plus the media/CSS probe directly exercised platform preference conditions.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-dark.png", "evidence/home-forced-colors.png", "evidence/preferences-motion.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "status": "issues", "confidence": "high", "method": "DOM/CSS inspection", "evidence": "CSS inspection found no view-transition rules across the homepage while navigation changes between search verticals are meaningful state/route swaps.", "pathIds": [ "home", "image-search" ], "artifacts": [ "evidence/preferences-motion.json", "evidence/search-results.png", "evidence/images-results.png" ], "findingIds": [ "F-03" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "status": "issues", "confidence": "high", "method": "DOM/CSS inspection", "evidence": "CSS inspection found no animation-timeline rules on the horizontally scrolling news/image surfaces.", "pathIds": [ "home", "image-search" ], "artifacts": [ "evidence/preferences-motion.json", "evidence/images-results.png", "evidence/news-results.png" ], "findingIds": [ "F-04" ] }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "status": "issues", "confidence": "high", "method": "DOM/CSS inspection", "evidence": "Homepage and news screenshots show horizontal card rails with custom arrows; CSS inspection found no scroll-snap primitive.", "pathIds": [ "home", "image-search" ], "artifacts": [ "evidence/home-desktop.png", "evidence/news-results.png" ], "findingIds": [ "F-05" ] }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "status": "issues", "confidence": "high", "method": "visual navigation review + DOM/CSS inspection", "evidence": "The homepage has a long Discover surface and news feed, but inspection found no scroll-state query or progress treatment.", "pathIds": [ "home", "search-results", "image-search", "news-search" ], "artifacts": [ "evidence/home-desktop.png", "evidence/news-results.png" ], "findingIds": [ "F-06" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "status": "issues", "confidence": "high", "method": "visual navigation review + DOM/CSS inspection", "evidence": "The DOM exposes custom tooltip/account/visual-search overlays, while CSS inspection found no anchor-name or position-try usage.", "pathIds": [ "home", "search-results", "image-search", "news-search" ], "artifacts": [ "evidence/home-dom.json", "evidence/home-quality-probe.json" ], "findingIds": [ "F-07" ] }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "status": "issues", "confidence": "high", "method": "visual navigation review + DOM/CSS inspection", "evidence": "Search, Images and News screenshots show immediate template swaps with only tab underline changes and no transition/highlight cue.", "pathIds": [ "home", "search-results", "image-search", "news-search" ], "artifacts": [ "evidence/search-results.png", "evidence/images-results.png", "evidence/news-results.png" ], "findingIds": [ "F-08" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "status": "issues", "confidence": "high", "method": "visual review + overlay DOM inspection", "evidence": "The rendered 780 px viewport shows the consent dialog consuming roughly the lower half of the page; desktop captures also cover the lower content rail.", "pathIds": [ "home", "image-search", "news-search" ], "artifacts": [ "evidence/discoverability-rendered.png", "evidence/home-desktop.png", "evidence/images-results.png" ], "findingIds": [ "F-09" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "status": "issues", "confidence": "high", "method": "visual review + overlay DOM inspection", "evidence": "The DOM probe found the cookie, image search and trivia overlays as div[role=dialog], and Lighthouse reported an unnamed dialog.", "pathIds": [ "home", "image-search", "news-search" ], "artifacts": [ "evidence/home-quality-probe.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F-10" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "status": "pass", "confidence": "medium", "method": "visual review + overlay DOM inspection", "evidence": "reduced-chrome: First-load desktop/mobile screenshots and overlay DOM show the content/chrome balance and consent treatment.", "pathIds": [ "home", "image-search", "news-search" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png", "evidence/images-results.png", "evidence/home-quality-probe.json" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "status": "issues", "confidence": "high", "method": "mobile layout + focus/target probe", "evidence": "The mobile layout primitive measured scrollWidth 769 px against visualViewportWidth 360 px, or 409 px horizontal overflow; the screenshot clips the search box and rails.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/home-mobile-layout.json", "evidence/home-mobile.png" ], "findingIds": [ "F-11" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "status": "issues", "confidence": "high", "method": "mobile layout + focus/target probe", "evidence": "CSS inspection reported container-type: normal and no @container rules; the homepage search box and card rail remain desktop-width and clip on mobile.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/home-dom.json", "evidence/home-mobile-layout.json", "evidence/home-mobile.png" ], "findingIds": [ "F-12" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "status": "issues", "confidence": "high", "method": "mobile layout + focus/target probe", "evidence": "The focus/target probe measured the visual-search and clear controls at 24x24 px and the menu at 20 px wide; focused search textarea and image-search button computed with no outline or box shadow.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/home-quality-probe.json" ], "findingIds": [ "F-13" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "status": "pass", "confidence": "medium", "method": "representative journey walkthrough", "evidence": "clear-purpose-and-primary-action: The entry page, direct query results, image results, news results and an invalid URL were walked as representative task and recovery states.", "pathIds": [ "home", "search-results", "image-search", "news-search", "invalid-route" ], "artifacts": [ "evidence/home-desktop.png", "evidence/search-results.png", "evidence/images-results.png", "evidence/news-results.png", "evidence/error-404.png" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "status": "pass", "confidence": "medium", "method": "representative journey walkthrough", "evidence": "primary-flow-completion: The entry page, direct query results, image results, news results and an invalid URL were walked as representative task and recovery states.", "pathIds": [ "home", "search-results", "image-search", "news-search", "invalid-route" ], "artifacts": [ "evidence/home-desktop.png", "evidence/search-results.png", "evidence/images-results.png", "evidence/news-results.png", "evidence/error-404.png" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "status": "issues", "confidence": "high", "method": "representative journey walkthrough", "evidence": "Navigating to /this-path-should-not-exist-web-uplift rendered the normal Bing homepage rather than a clear 404 explanation or recovery choice.", "pathIds": [ "home", "search-results", "image-search", "news-search", "invalid-route" ], "artifacts": [ "evidence/error-404.png" ], "findingIds": [ "F-14" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "status": "issues", "confidence": "high", "method": "trace + Lighthouse + layout + HAR", "evidence": "Lighthouse measured LCP at 4.646 s (score 0.34), although the separate trace measured 1.936 s; the slower throttled result establishes a common constrained-device risk.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-trace-summary.json" ], "findingIds": [ "F-15" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "status": "pass", "confidence": "medium", "method": "trace + Lighthouse + layout + HAR", "evidence": "visual-stability: Trace, Lighthouse, layout metrics, HAR and image audit directly measured loading, stability, main-thread and delivery behavior.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-trace-summary.json", "evidence/lighthouse-summary.json", "evidence/home-mobile-layout.json", "evidence/home-network-summary.json", "evidence/images-audit.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "status": "pass", "confidence": "medium", "method": "trace + Lighthouse + layout + HAR", "evidence": "efficient-main-thread: Trace, Lighthouse, layout metrics, HAR and image audit directly measured loading, stability, main-thread and delivery behavior.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-trace-summary.json", "evidence/lighthouse-summary.json", "evidence/home-mobile-layout.json", "evidence/home-network-summary.json", "evidence/images-audit.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "status": "issues", "confidence": "high", "method": "trace + Lighthouse + layout + HAR", "evidence": "HAR recorded 180 requests, including 18 stylesheets and ten parser-inserted VeryHigh-priority stylesheet candidates; Lighthouse failed LCP discovery and network dependency insights.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-network-summary.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F-16" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "status": "issues", "confidence": "high", "method": "trace + Lighthouse + layout + HAR", "evidence": "HAR recorded 75 scripts plus 42 XHR/fetch requests and 129 third-party-origin requests; Lighthouse also reported missing source maps for large first-party JavaScript.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-network-summary.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F-17" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "status": "issues", "confidence": "high", "method": "Lighthouse accessibility + visual/focus/DOM probe", "evidence": "Lighthouse failed aria-dialog-name; the image audit found 6 images without alt text, and the probe found an empty H1 and unnamed custom controls.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/images-audit.json", "evidence/home-quality-probe.json" ], "findingIds": [ "F-18" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "status": "pass", "confidence": "medium", "method": "Lighthouse accessibility + visual/focus/DOM probe", "evidence": "sufficient-contrast: Lighthouse accessibility audits, forced-colors/mobile captures and a keyboard focus/semantic probe directly tested inclusion.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-forced-colors.png", "evidence/home-mobile.png", "evidence/home-quality-probe.json" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "status": "issues", "confidence": "high", "method": "Lighthouse accessibility + visual/focus/DOM probe", "evidence": "The DOM probe found an empty H1 and focused primary search/image controls with no outline or box shadow; Lighthouse reported a malformed accessibility tree.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/home-quality-probe.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F-19" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "status": "pass", "confidence": "medium", "method": "Lighthouse accessibility + visual/focus/DOM probe", "evidence": "legible-text: Lighthouse accessibility audits, forced-colors/mobile captures and a keyboard focus/semantic probe directly tested inclusion.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-forced-colors.png", "evidence/home-mobile.png", "evidence/home-quality-probe.json" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "status": "issues", "confidence": "high", "method": "Lighthouse accessibility + visual/focus/DOM probe", "evidence": "The 360 px page has 409 px horizontal overflow, several targets are 20-24 px, and Lighthouse failed meta-viewport because scaling is restricted below its threshold.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/home-mobile-layout.json", "evidence/home-quality-probe.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F-20" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "status": "issues", "confidence": "high", "method": "Lighthouse + DOM/runtime/image inspection", "evidence": "Lighthouse failed the errors-in-console audit, despite the later in-page error array being empty, indicating load-time errors not retained by the page probe.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-quality-probe.json" ], "findingIds": [ "F-21" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "status": "issues", "confidence": "high", "method": "Lighthouse + DOM/runtime/image inspection", "evidence": "The image audit found 25 of 32 images without width/height attributes, creating latent layout-shift risk even though the sampled CLS was low.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/images-audit.json", "evidence/home-mobile-layout.json" ], "findingIds": [ "F-22" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "status": "issues", "confidence": "high", "method": "Lighthouse + DOM/runtime/image inspection", "evidence": "Lighthouse reported one deprecated API warning, missing source maps for large first-party JavaScript and DevTools inspector issues.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/lighthouse-summary.json" ], "findingIds": [ "F-23" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "status": "pass", "confidence": "medium", "method": "discoverability + robots + DOM + Lighthouse SEO", "evidence": "title-and-description: Raw-vs-rendered discoverability, robots, DOM metadata and Lighthouse SEO evidence directly inspected crawl/index signals.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/discoverability", "evidence/discoverability-rendered.png", "evidence/discoverability-crawler.png", "evidence/robots.json", "evidence/home-quality-probe.json", "evidence/lighthouse-summary.json" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "status": "issues", "confidence": "high", "method": "discoverability + robots + DOM + Lighthouse SEO", "evidence": "The probe found 6 javascript: links and Lighthouse failed crawlable-anchors and meta-viewport; robots.txt disallows /search.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/home-quality-probe.json", "evidence/lighthouse-summary.json", "evidence/robots.json" ], "findingIds": [ "F-24" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "status": "pass", "confidence": "medium", "method": "discoverability + robots + DOM + Lighthouse SEO", "evidence": "canonical-and-indexing-signals: Raw-vs-rendered discoverability, robots, DOM metadata and Lighthouse SEO evidence directly inspected crawl/index signals.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/discoverability", "evidence/discoverability-rendered.png", "evidence/discoverability-crawler.png", "evidence/robots.json", "evidence/home-quality-probe.json", "evidence/lighthouse-summary.json" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "status": "issues", "confidence": "high", "method": "discoverability + robots + DOM + Lighthouse SEO", "evidence": "The DOM probe found zero JSON-LD blocks while the page represents the Bing organization/search service; Open Graph metadata is present.", "pathIds": [ "home", "search-results" ], "artifacts": [ "evidence/home-quality-probe.json" ], "findingIds": [ "F-25" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "status": "issues", "confidence": "high", "method": "headers + cookies + trackers + secrets + HAR", "evidence": "Headers include HTTPS, HSTS and CSP, but omit X-Content-Type-Options and Referrer-Policy; cookies reported MUIDB, _EDGE_V and _EDGE_S without Secure and pervasive SameSite=None.", "pathIds": [ "home" ], "artifacts": [ "evidence/headers.json", "evidence/cookies.json" ], "findingIds": [ "F-26" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "status": "issues", "confidence": "high", "method": "headers + cookies + trackers + secrets + HAR", "evidence": "HAR recorded 129 third-party-origin requests transferring 617,687 bytes; trackers enumerated 8 third-party origins and the consent dialog states advertising/analytics use.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-network-summary.json", "evidence/trackers.json", "evidence/home-desktop.png" ], "findingIds": [ "F-27" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon", "evidence": "Authentication is delegated to Microsoft identity outside the audited host, and no permission prompt fired on the audited Bing surfaces; the host-owned portion is therefore not applicable to these unauthenticated paths.", "reason": "Authentication is delegated to Microsoft identity outside the audited host, and no permission prompt fired on the audited Bing surfaces; the host-owned portion is therefore not applicable to these unauthenticated paths.", "pathIds": [ "home" ] }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "status": "issues", "confidence": "high", "method": "headers + cookies + trackers + secrets + HAR", "evidence": "HSTS and SAMEORIGIN are present, but Referrer-Policy and nosniff are absent; Permissions-Policy only disables unload and CSP allows wasm-unsafe-eval.", "pathIds": [ "home" ], "artifacts": [ "evidence/headers.json" ], "findingIds": [ "F-28" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "status": "issues", "confidence": "high", "method": "no-JS discoverability + route/error-state review", "evidence": "Discoverability measured only 14% rendered-word coverage in raw HTML; the crawler screenshot is a blank dark surface while the rendered screenshot contains search, navigation and content.", "pathIds": [ "home", "search-results", "invalid-route" ], "artifacts": [ "evidence/discoverability", "evidence/discoverability-rendered.png", "evidence/discoverability-crawler.png" ], "findingIds": [ "F-29" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "status": "pass", "confidence": "medium", "method": "no-JS discoverability + route/error-state review", "evidence": "resilient-runtime-behaviour: No-JS crawler comparison, multiple routes and an invalid route directly exercised progressive content and recovery behavior.", "pathIds": [ "home", "search-results", "invalid-route" ], "artifacts": [ "evidence/discoverability", "evidence/discoverability-crawler.png", "evidence/search-results.png", "evidence/error-404.png" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon", "evidence": "Bing search is intrinsically network-dependent; an installable offline experience is not required for the representative public search surfaces.", "reason": "Bing search is intrinsically network-dependent; an installable offline experience is not required for the representative public search surfaces.", "pathIds": [ "home", "search-results", "invalid-route" ] }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "status": "issues", "confidence": "high", "method": "no-JS discoverability + route/error-state review", "evidence": "The deliberately invalid URL rendered the homepage with no not-found state, so users and agents cannot distinguish a bad route from successful navigation.", "pathIds": [ "home", "search-results", "invalid-route" ], "artifacts": [ "evidence/error-404.png" ], "findingIds": [ "F-30" ] }, { "principleId": "be-internationalised", "checkId": "lang-dir-and-logical-properties", "status": "pass", "confidence": "medium", "method": "DOM/i18n inspection", "evidence": "lang-dir-and-logical-properties: DOM metadata and representative en-GB content were inspected for language, direction and locale-sensitive content.", "pathIds": [ "home", "search-results", "news-search" ], "artifacts": [ "evidence/home-quality-probe.json", "evidence/search-dom.json", "evidence/news-results.png" ] }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon", "evidence": "The audited homepage/search/image/news surfaces contain no user-facing dates, currencies, durations or entered locale-sensitive data requiring formatting.", "reason": "The audited homepage/search/image/news surfaces contain no user-facing dates, currencies, durations or entered locale-sensitive data requiring formatting.", "pathIds": [ "home", "search-results", "news-search" ] }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon", "evidence": "The representative audited surfaces expose no scheduled events or time-zone-sensitive values.", "reason": "The representative audited surfaces expose no scheduled events or time-zone-sensitive values.", "pathIds": [ "home", "search-results", "news-search" ] }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "status": "pass", "confidence": "medium", "method": "flow and consent/form DOM review", "evidence": "no-dark-patterns: Consent, search, image search and unauthenticated account entry surfaces were visually and semantically inspected.", "pathIds": [ "home", "search-results", "image-search" ], "artifacts": [ "evidence/home-desktop.png", "evidence/images-results.png", "evidence/home-quality-probe.json" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon", "evidence": "The representative core search input accepts arbitrary text and has no required/invalid state to trigger; no validation flow genuinely applies.", "reason": "The representative core search input accepts arbitrary text and has no required/invalid state to trigger; no validation flow genuinely applies.", "pathIds": [ "home", "search-results", "image-search" ] }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon", "evidence": "The core query is free-form search text where personal-data autofill tokens would be inappropriate; autocomplete=off does not obstruct an address, payment or identity task.", "reason": "The core query is free-form search text where personal-data autofill tokens would be inappropriate; autocomplete=off does not obstruct an address, payment or identity task.", "pathIds": [ "home", "search-results", "image-search" ] }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon", "evidence": "No checkout, subscription or account-management flow exists on the audited unauthenticated Bing surfaces; sign-in is delegated outside the host.", "reason": "No checkout, subscription or account-management flow exists on the audited unauthenticated Bing surfaces; sign-in is delegated outside the host.", "pathIds": [ "home", "search-results", "image-search" ] }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "status": "issues", "confidence": "high", "method": "HAR + image audit", "evidence": "The image audit found 20 images without srcset and 25 without dimensions; HAR also transferred both a 234,651-byte WebP and a 186,024-byte AVIF homepage background candidate.", "pathIds": [ "home" ], "artifacts": [ "evidence/images-audit.json", "evidence/home-network-summary.json" ], "findingIds": [ "F-31" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "status": "pass", "confidence": "medium", "method": "HAR + image audit", "evidence": "no-wasteful-work: HAR and image evidence directly measured bytes, request mix, formats, responsive delivery and third-party weight.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-network-summary.json", "evidence/images-audit.json" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "status": "issues", "confidence": "high", "method": "HAR + image audit", "evidence": "129 of 180 requests were classified as third-party-origin and transferred 617,687 bytes, nearly half the 1.316 MB total.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-network-summary.json", "evidence/trackers.json" ], "findingIds": [ "F-32" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "status": "issues", "confidence": "high", "method": "Lighthouse agentic browsing + no-JS discoverability", "evidence": "Lighthouse agentic-browsing scored 0.50 and failed accessibility-tree quality; no-JS coverage was 14%, leaving agents dependent on brittle rendered-page interaction.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/discoverability" ], "findingIds": [ "F-33" ] }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon", "evidence": "The audited public search pages provide a server-backed search service; no bounded on-device summarisation or language-model task was evident where local inference is clearly preferable.", "reason": "The audited public search pages provide a server-backed search service; no bounded on-device summarisation or language-model task was evident where local inference is clearly preferable.", "pathIds": [ "home" ] }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "status": "issues", "confidence": "low", "method": "before/after heap summaries", "evidence": "Baseline heap summary had 205,144 nodes and 12,961,305 self-size bytes; after ten focus/input/clear/blur cycles the post summary had 1,093,682 nodes and 62,029,465 bytes. Independent page loads reduce confidence, but the 4.8x retained-size signal is too large to dismiss.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline", "evidence/heap-post-valid" ], "findingIds": [ "F-34" ] }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "status": "issues", "confidence": "medium", "method": "before/after heap summaries", "evidence": "The post-interaction heap summary retained 1.09 million nodes, 4.72 million edges and 62.0 MB self size after a small repeated query interaction.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-post-valid" ], "findingIds": [ "F-35" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "status": "issues", "confidence": "low", "method": "before/after heap summaries", "evidence": "No Detached* constructor appeared in the compact summaries, but closures rose from 9,187 to 65,148 across the baseline/post captures alongside major node growth.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline", "evidence/heap-post-valid" ], "findingIds": [ "F-36" ] } ], "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F-01", "F-02" ] }, { "principleId": "implement-natural-interactions", "expectation": "default", "status": "issues", "findingIds": [ "F-03", "F-04", "F-05" ] }, { "principleId": "provide-guided-navigation", "expectation": "default", "status": "issues", "findingIds": [ "F-06", "F-07", "F-08" ] }, { "principleId": "maximize-content-reduce-noise", "expectation": "default", "status": "issues", "findingIds": [ "F-09", "F-10" ] }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "issues", "findingIds": [ "F-11", "F-12", "F-13" ] }, { "principleId": "support-core-task-success", "expectation": "default", "status": "issues", "findingIds": [ "F-14" ] }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F-15", "F-16", "F-17" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "issues", "findingIds": [ "F-18", "F-19", "F-20" ] }, { "principleId": "follow-best-practices", "expectation": "default", "status": "issues", "findingIds": [ "F-21", "F-22", "F-23" ] }, { "principleId": "be-discoverable", "expectation": "default", "status": "issues", "findingIds": [ "F-24", "F-25" ] }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F-26", "F-27", "F-28" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "issues", "findingIds": [ "F-29", "F-30" ] }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "pass" }, { "principleId": "be-trustworthy", "expectation": "default", "status": "pass" }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F-31", "F-32" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "issues", "findingIds": [ "F-33" ] }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "issues", "findingIds": [ "F-34", "F-35", "F-36" ] } ], "paths": [ { "id": "home", "description": "Homepage and core search entry; representative global shell, consent, preferences and primary action.", "url": "https://www.bing.com", "conditions": [ "desktop", "360x800", "prefers-color-scheme: dark", "prefers-reduced-motion: reduce", "forced-colors: active", "JavaScript disabled" ], "result": "issues" }, { "id": "search-results", "description": "Primary web-search completion with a representative query.", "url": "https://www.bing.com/search?q=modern+web", "conditions": [ "desktop", "360x800" ], "result": "issues" }, { "id": "image-search", "description": "Image-result template and dense media/filter interaction surface.", "url": "https://www.bing.com/images/search?q=modern+web", "conditions": [ "desktop" ], "result": "issues" }, { "id": "news-search", "description": "News listing template with categories, rail and cards.", "url": "https://www.bing.com/news/search?q=web", "conditions": [ "desktop" ], "result": "issues" }, { "id": "invalid-route", "description": "Deliberately invalid route to evaluate error/recovery behavior.", "url": "https://www.bing.com/this-path-should-not-exist-web-uplift", "conditions": [ "desktop" ], "result": "issues" } ], "findings": [ { "id": "F-11", "pathId": "home", "url": "https://www.bing.com/", "principleId": "adapt-to-the-form-factor", "principleCheckId": "responsive-no-horizontal-scroll", "guidanceId": "css-layout", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "The homepage overflows severely at a 360 px viewport.", "evidence": "The mobile layout primitive measured scrollWidth 769 px against visualViewportWidth 360 px, or 409 px horizontal overflow; the screenshot clips the search box and rails.", "artifacts": [ "evidence/home-mobile-layout.json", "evidence/home-mobile.png" ], "suggestedFix": "Remove fixed minimum widths, make search/rails intrinsically size to the viewport, and verify 320-400 px reflow.", "effort": "medium" }, { "id": "F-13", "pathId": "home", "url": "https://www.bing.com/", "principleId": "adapt-to-the-form-factor", "principleCheckId": "input-modality-aware", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Important controls have undersized targets or no visible keyboard focus.", "evidence": "The focus/target probe measured the visual-search and clear controls at 24x24 px and the menu at 20 px wide; focused search textarea and image-search button computed with no outline or box shadow.", "artifacts": [ "evidence/home-quality-probe.json" ], "suggestedFix": "Provide at least 44x44 CSS px targets and robust :focus-visible styles for every custom control.", "effort": "medium" }, { "id": "F-15", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Laboratory LCP is outside the good range.", "evidence": "Lighthouse measured LCP at 4.646 s (score 0.34), although the separate trace measured 1.936 s; the slower throttled result establishes a common constrained-device risk.", "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-trace-summary.json" ], "suggestedFix": "Prioritize the LCP background/content image, reduce discovery delay and avoid competing early work.", "effort": "medium" }, { "id": "F-18", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-inclusive", "principleCheckId": "names-roles-labels", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Some dialogs and images lack accessible names or alternatives.", "evidence": "Lighthouse failed aria-dialog-name; the image audit found 6 images without alt text, and the probe found an empty H1 and unnamed custom controls.", "artifacts": [ "evidence/lighthouse-summary.json", "evidence/images-audit.json", "evidence/home-quality-probe.json" ], "suggestedFix": "Name every dialog, provide meaningful alt or mark decorative images appropriately, and ensure custom controls expose names and roles.", "effort": "medium" }, { "id": "F-19", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-inclusive", "principleCheckId": "structure-and-focus", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Heading semantics and focus visibility are inconsistent.", "evidence": "The DOM probe found an empty H1 and focused primary search/image controls with no outline or box shadow; Lighthouse reported a malformed accessibility tree.", "artifacts": [ "evidence/home-quality-probe.json", "evidence/lighthouse-summary.json" ], "suggestedFix": "Give the page a meaningful H1, repair tree semantics and apply clear :focus-visible treatment to custom controls.", "effort": "medium" }, { "id": "F-20", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-inclusive", "principleCheckId": "zoom-reflow-targets-and-media", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Reflow, zoom and target-size behavior fail the inclusive mobile baseline.", "evidence": "The 360 px page has 409 px horizontal overflow, several targets are 20-24 px, and Lighthouse failed meta-viewport because scaling is restricted below its threshold.", "artifacts": [ "evidence/home-mobile-layout.json", "evidence/home-quality-probe.json", "evidence/lighthouse-summary.json" ], "suggestedFix": "Allow user zoom, remove fixed-width overflow and enlarge touch targets without changing visual density unnecessarily.", "effort": "medium" }, { "id": "F-24", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-discoverable", "principleCheckId": "crawlable-and-mobile-friendly", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Search links and mobile crawler signals are weakened.", "evidence": "The probe found 6 javascript: links and Lighthouse failed crawlable-anchors and meta-viewport; robots.txt disallows /search.", "artifacts": [ "evidence/home-quality-probe.json", "evidence/lighthouse-summary.json", "evidence/robots.json" ], "suggestedFix": "Use real href destinations for navigation, permit zoom/reflow, and align robots policy with the intended public search surfaces.", "effort": "medium" }, { "id": "F-26", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-private-and-secure", "principleCheckId": "secure-transport-and-headers", "guidanceId": "security", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Cookie and header hardening is incomplete.", "evidence": "Headers include HTTPS, HSTS and CSP, but omit X-Content-Type-Options and Referrer-Policy; cookies reported MUIDB, _EDGE_V and _EDGE_S without Secure and pervasive SameSite=None.", "artifacts": [ "evidence/headers.json", "evidence/cookies.json" ], "suggestedFix": "Set nosniff and a deliberate Referrer-Policy, mark all HTTPS cookies Secure, and narrow SameSite=None to cookies that truly require cross-site use.", "effort": "medium" }, { "id": "F-29", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-resilient", "principleCheckId": "progressive-enhancement", "guidanceId": "stabilize-reactive-state", "guidanceCategory": "modern-web-guidance", "severity": "high", "confidence": "high", "summary": "Most rendered homepage content is unavailable without JavaScript.", "evidence": "Discoverability measured only 14% rendered-word coverage in raw HTML; the crawler screenshot is a blank dark surface while the rendered screenshot contains search, navigation and content.", "artifacts": [ "evidence/discoverability", "evidence/discoverability-rendered.png", "evidence/discoverability-crawler.png" ], "suggestedFix": "Server-render the core search form, navigation and essential copy, then progressively enhance dynamic feeds.", "effort": "medium" }, { "id": "F-01", "pathId": "home", "url": "https://www.bing.com/", "principleId": "respect-user-preferences", "principleCheckId": "respects-color-scheme", "guidanceId": "dark-mode", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "The homepage does not expose a user-preference-driven dark theme.", "evidence": "The dark-preference capture keeps the same white search and consent surfaces as the default capture; computed color-scheme is normal and the CSS probe found no prefers-color-scheme theming rule.", "artifacts": [ "evidence/home-desktop.png", "evidence/home-dark.png", "evidence/home-dom.json" ], "suggestedFix": "Declare color-scheme and provide prefers-color-scheme or light-dark() tokens for surfaces and controls.", "effort": "medium" }, { "id": "F-02", "pathId": "home", "url": "https://www.bing.com/", "principleId": "respect-user-preferences", "principleCheckId": "respects-reduced-motion", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "Motion continues when reduced motion is requested.", "evidence": "Under prefers-reduced-motion: reduce, getAnimations() still reported a running slide-up animation with a 2000 ms duration, and no reduced-motion rule was found.", "artifacts": [ "evidence/preferences-motion.json" ], "suggestedFix": "Disable or substantially reduce non-essential slide-up motion inside prefers-reduced-motion: reduce.", "effort": "medium" }, { "id": "F-09", "pathId": "home", "url": "https://www.bing.com/", "principleId": "maximize-content-reduce-noise", "principleCheckId": "no-intrusive-interruptions", "guidanceId": "light-dismiss-a-dialog", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "The first-load consent panel obscures a large portion of content.", "evidence": "The rendered 780 px viewport shows the consent dialog consuming roughly the lower half of the page; desktop captures also cover the lower content rail.", "artifacts": [ "evidence/discoverability-rendered.png", "evidence/home-desktop.png", "evidence/images-results.png" ], "suggestedFix": "Use a compact, non-blocking consent treatment with equally prominent choices and preserve immediate access to core content.", "effort": "medium" }, { "id": "F-14", "pathId": "home", "url": "https://www.bing.com/", "principleId": "support-core-task-success", "principleCheckId": "clear-system-state-and-recovery", "guidanceId": "forms", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "Unknown URLs do not present a clear not-found recovery state.", "evidence": "Navigating to /this-path-should-not-exist-web-uplift rendered the normal Bing homepage rather than a clear 404 explanation or recovery choice.", "artifacts": [ "evidence/error-404.png" ], "suggestedFix": "Return an accurate 404 status with a concise message, search field and route back to the homepage.", "effort": "medium" }, { "id": "F-16", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-resource-delivery", "guidanceId": "optimize-image-priority", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "The critical network path is fragmented and request-heavy.", "evidence": "HAR recorded 180 requests, including 18 stylesheets and ten parser-inserted VeryHigh-priority stylesheet candidates; Lighthouse failed LCP discovery and network dependency insights.", "artifacts": [ "evidence/home-network-summary.json", "evidence/lighthouse-summary.json" ], "suggestedFix": "Consolidate critical CSS, defer non-critical styles/scripts and ensure the LCP resource is discoverable and prioritized.", "effort": "medium" }, { "id": "F-17", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-fast-and-stable", "principleCheckId": "trim-unused-and-duplicate-code", "guidanceId": "break-up-long-tasks", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "The homepage ships a large, fragmented script surface for its core search task.", "evidence": "HAR recorded 75 scripts plus 42 XHR/fetch requests and 129 third-party-origin requests; Lighthouse also reported missing source maps for large first-party JavaScript.", "artifacts": [ "evidence/home-network-summary.json", "evidence/lighthouse-summary.json" ], "suggestedFix": "Code-split optional widgets, remove duplicate/unused bundles and load rewards/discovery features after core search is ready.", "effort": "medium" }, { "id": "F-21", "pathId": "home", "url": "https://www.bing.com/", "principleId": "follow-best-practices", "principleCheckId": "no-console-errors", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "The page logs browser errors during Lighthouse loading.", "evidence": "Lighthouse failed the errors-in-console audit, despite the later in-page error array being empty, indicating load-time errors not retained by the page probe.", "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-quality-probe.json" ], "suggestedFix": "Capture and fix the specific load-time console entries in DevTools/Lighthouse and prevent handled failures from surfacing as errors.", "effort": "medium" }, { "id": "F-22", "pathId": "home", "url": "https://www.bing.com/", "principleId": "follow-best-practices", "principleCheckId": "sound-document-and-assets", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "Many content images omit intrinsic dimensions.", "evidence": "The image audit found 25 of 32 images without width/height attributes, creating latent layout-shift risk even though the sampled CLS was low.", "artifacts": [ "evidence/images-audit.json", "evidence/home-mobile-layout.json" ], "suggestedFix": "Emit width and height or aspect-ratio for every content image and preserve the intended intrinsic ratio.", "effort": "medium" }, { "id": "F-23", "pathId": "home", "url": "https://www.bing.com/", "principleId": "follow-best-practices", "principleCheckId": "browser-platform-hygiene", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "Deprecated API, source-map and inspector issues remain.", "evidence": "Lighthouse reported one deprecated API warning, missing source maps for large first-party JavaScript and DevTools inspector issues.", "artifacts": [ "evidence/lighthouse-summary.json" ], "suggestedFix": "Remove deprecated API usage, publish valid production source maps where policy allows, and clear actionable inspector issues.", "effort": "medium" }, { "id": "F-27", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-private-and-secure", "principleCheckId": "data-minimisation-and-third-parties", "guidanceId": "privacy", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "The default homepage has a broad third-party and analytics footprint.", "evidence": "HAR recorded 129 third-party-origin requests transferring 617,687 bytes; trackers enumerated 8 third-party origins and the consent dialog states advertising/analytics use.", "artifacts": [ "evidence/home-network-summary.json", "evidence/trackers.json", "evidence/home-desktop.png" ], "suggestedFix": "Delay non-essential analytics and widgets until consent, batch telemetry, and reduce cross-origin requests to the minimum needed for search.", "effort": "medium" }, { "id": "F-28", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-private-and-secure", "principleCheckId": "defensive-browser-policies", "guidanceId": "security", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "Defensive browser policies are only partially configured.", "evidence": "HSTS and SAMEORIGIN are present, but Referrer-Policy and nosniff are absent; Permissions-Policy only disables unload and CSP allows wasm-unsafe-eval.", "artifacts": [ "evidence/headers.json" ], "suggestedFix": "Add nosniff and a strict Referrer-Policy, expand Permissions-Policy to least privilege, and remove wasm-unsafe-eval unless required.", "effort": "medium" }, { "id": "F-30", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-resilient", "principleCheckId": "network-and-http-failure-states", "guidanceId": "forms", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "The invalid-route experience hides the failure rather than explaining recovery.", "evidence": "The deliberately invalid URL rendered the homepage with no not-found state, so users and agents cannot distinguish a bad route from successful navigation.", "artifacts": [ "evidence/error-404.png" ], "suggestedFix": "Return a truthful 404 and offer search/retry/home recovery actions.", "effort": "medium" }, { "id": "F-31", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-sustainable", "principleCheckId": "optimised-assets", "guidanceId": "deliver-optimized-decorative-images", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "Responsive image delivery is incomplete despite modern formats.", "evidence": "The image audit found 20 images without srcset and 25 without dimensions; HAR also transferred both a 234,651-byte WebP and a 186,024-byte AVIF homepage background candidate.", "artifacts": [ "evidence/images-audit.json", "evidence/home-network-summary.json" ], "suggestedFix": "Use one negotiated modern source per client, responsive srcset/sizes and intrinsic dimensions for content imagery.", "effort": "medium" }, { "id": "F-32", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-sustainable", "principleCheckId": "third-party-and-media-budget", "guidanceId": "efficient-background-processing", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "high", "summary": "Third-party work is disproportionate to the core search entry task.", "evidence": "129 of 180 requests were classified as third-party-origin and transferred 617,687 bytes, nearly half the 1.316 MB total.", "artifacts": [ "evidence/home-network-summary.json", "evidence/trackers.json" ], "suggestedFix": "Defer optional rewards/news/media integrations and set a third-party byte/request budget for first interaction.", "effort": "medium" }, { "id": "F-34", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-memory-efficient", "principleCheckId": "no-leak-under-repeated-interaction", "guidanceId": "manage-recurring-intervals", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "low", "summary": "Heap growth after repeated query edits warrants leak investigation.", "evidence": "Baseline heap summary had 205,144 nodes and 12,961,305 self-size bytes; after ten focus/input/clear/blur cycles the post summary had 1,093,682 nodes and 62,029,465 bytes. Independent page loads reduce confidence, but the 4.8x retained-size signal is too large to dismiss.", "artifacts": [ "evidence/heap-baseline", "evidence/heap-post-valid" ], "suggestedFix": "Repeat baseline/target/final snapshots in one controlled session with forced GC, then trace retained query-suggestion closures, caches and listeners.", "effort": "large" }, { "id": "F-35", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-memory-efficient", "principleCheckId": "bounded-footprint", "guidanceId": "manage-recurring-intervals", "guidanceCategory": "modern-web-guidance", "severity": "medium", "confidence": "medium", "summary": "The post-interaction footprint is heavy for the homepage shell.", "evidence": "The post-interaction heap summary retained 1.09 million nodes, 4.72 million edges and 62.0 MB self size after a small repeated query interaction.", "artifacts": [ "evidence/heap-post-valid" ], "suggestedFix": "Profile the largest retained constructors and lazy-load/dispose optional feed, rewards and suggestion subsystems.", "effort": "large" }, { "id": "F-03", "pathId": "home", "url": "https://www.bing.com/", "principleId": "implement-natural-interactions", "principleCheckId": "view-transitions", "guidanceId": "same-document-transitions", "guidanceCategory": "modern-web-guidance", "severity": "low", "confidence": "high", "summary": "Route and state changes do not use declarative View Transitions.", "evidence": "CSS inspection found no view-transition rules across the homepage while navigation changes between search verticals are meaningful state/route swaps.", "artifacts": [ "evidence/preferences-motion.json", "evidence/search-results.png", "evidence/images-results.png" ], "suggestedFix": "Use same-document or cross-document View Transitions for vertical and result-state changes, with reduced-motion handling.", "effort": "medium" }, { "id": "F-04", "pathId": "home", "url": "https://www.bing.com/", "principleId": "implement-natural-interactions", "principleCheckId": "scroll-driven-animations", "guidanceId": "scrollytelling", "guidanceCategory": "modern-web-guidance", "severity": "low", "confidence": "high", "summary": "Scrollable feeds and carousels do not expose declarative scroll-driven treatment.", "evidence": "CSS inspection found no animation-timeline rules on the horizontally scrolling news/image surfaces.", "artifacts": [ "evidence/preferences-motion.json", "evidence/images-results.png", "evidence/news-results.png" ], "suggestedFix": "Use CSS scroll-driven animation only where position feedback adds value, avoiding scroll listeners.", "effort": "medium" }, { "id": "F-05", "pathId": "home", "url": "https://www.bing.com/", "principleId": "implement-natural-interactions", "principleCheckId": "physical-gestures", "guidanceId": "css-layout", "guidanceCategory": "modern-web-guidance", "severity": "low", "confidence": "high", "summary": "Horizontal carousels rely on custom arrow controls without native scroll-snap evidence.", "evidence": "Homepage and news screenshots show horizontal card rails with custom arrows; CSS inspection found no scroll-snap primitive.", "artifacts": [ "evidence/home-desktop.png", "evidence/news-results.png" ], "suggestedFix": "Adopt overflow scrolling with scroll-snap and overscroll behavior, retaining accessible previous/next controls.", "effort": "medium" }, { "id": "F-06", "pathId": "home", "url": "https://www.bing.com/", "principleId": "provide-guided-navigation", "principleCheckId": "scroll-state-aware-chrome", "guidanceId": "shrinking-header-on-scroll", "guidanceCategory": "modern-web-guidance", "severity": "low", "confidence": "high", "summary": "Long content surfaces provide static rather than scroll-state-aware chrome.", "evidence": "The homepage has a long Discover surface and news feed, but inspection found no scroll-state query or progress treatment.", "artifacts": [ "evidence/home-desktop.png", "evidence/news-results.png" ], "suggestedFix": "Use scroll-state containers or a lightweight progress affordance where long feeds benefit from position context.", "effort": "medium" }, { "id": "F-07", "pathId": "home", "url": "https://www.bing.com/", "principleId": "provide-guided-navigation", "principleCheckId": "anchored-positioning", "guidanceId": "position-aware-tooltips", "guidanceCategory": "modern-web-guidance", "severity": "low", "confidence": "high", "summary": "Transient menus and tooltips use custom positioning rather than CSS anchors.", "evidence": "The DOM exposes custom tooltip/account/visual-search overlays, while CSS inspection found no anchor-name or position-try usage.", "artifacts": [ "evidence/home-dom.json", "evidence/home-quality-probe.json" ], "suggestedFix": "Progressively enhance popovers and tooltips with CSS anchor positioning and fallback positions.", "effort": "medium" }, { "id": "F-08", "pathId": "home", "url": "https://www.bing.com/", "principleId": "provide-guided-navigation", "principleCheckId": "directs-attention", "guidanceId": "same-document-transitions", "guidanceCategory": "modern-web-guidance", "severity": "low", "confidence": "high", "summary": "Navigation state changes give limited directional or destination feedback.", "evidence": "Search, Images and News screenshots show immediate template swaps with only tab underline changes and no transition/highlight cue.", "artifacts": [ "evidence/search-results.png", "evidence/images-results.png", "evidence/news-results.png" ], "suggestedFix": "Add restrained directional transitions or destination highlights, respecting reduced motion.", "effort": "medium" }, { "id": "F-10", "pathId": "home", "url": "https://www.bing.com/", "principleId": "maximize-content-reduce-noise", "principleCheckId": "semantic-dismissible-primitives", "guidanceId": "declarative-dialog-popover-control", "guidanceCategory": "modern-web-guidance", "severity": "low", "confidence": "high", "summary": "Several overlays are ad-hoc role=dialog containers rather than native dialog/popover primitives.", "evidence": "The DOM probe found the cookie, image search and trivia overlays as div[role=dialog], and Lighthouse reported an unnamed dialog.", "artifacts": [ "evidence/home-quality-probe.json", "evidence/lighthouse-summary.json" ], "suggestedFix": "Use dialog for modal flows and popover for transient UI, with native focus/light-dismiss behavior and accessible names.", "effort": "medium" }, { "id": "F-12", "pathId": "home", "url": "https://www.bing.com/", "principleId": "adapt-to-the-form-factor", "principleCheckId": "component-level-responsiveness", "guidanceId": "size-aware-styling", "guidanceCategory": "modern-web-guidance", "severity": "low", "confidence": "high", "summary": "Reusable search and card components show no container-query adaptation.", "evidence": "CSS inspection reported container-type: normal and no @container rules; the homepage search box and card rail remain desktop-width and clip on mobile.", "artifacts": [ "evidence/home-dom.json", "evidence/home-mobile-layout.json", "evidence/home-mobile.png" ], "suggestedFix": "Introduce container queries for the search shell and content rails so components respond to available inline size.", "effort": "medium" }, { "id": "F-25", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-discoverable", "principleCheckId": "structured-and-shareable-metadata", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "severity": "low", "confidence": "high", "summary": "The homepage has social tags but no structured entity data.", "evidence": "The DOM probe found zero JSON-LD blocks while the page represents the Bing organization/search service; Open Graph metadata is present.", "artifacts": [ "evidence/home-quality-probe.json" ], "suggestedFix": "Add accurate Organization/WebSite JSON-LD with SearchAction only where it matches visible, functioning behavior.", "effort": "medium" }, { "id": "F-33", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-agent-ready", "principleCheckId": "structured-agent-capabilities", "guidanceId": "agentic-forms", "guidanceCategory": "modern-web-guidance", "severity": "low", "confidence": "high", "summary": "The search service offers weak machine-readable capability exposure.", "evidence": "Lighthouse agentic-browsing scored 0.50 and failed accessibility-tree quality; no-JS coverage was 14%, leaving agents dependent on brittle rendered-page interaction.", "artifacts": [ "evidence/lighthouse-summary.json", "evidence/discoverability" ], "suggestedFix": "Expose safe structured search/form capabilities and repair semantic/accessibility-tree quality before adding agent tools.", "effort": "medium" }, { "id": "F-36", "pathId": "home", "url": "https://www.bing.com/", "principleId": "be-memory-efficient", "principleCheckId": "no-detached-dom-or-unbounded-listeners", "guidanceId": "manage-recurring-intervals", "guidanceCategory": "modern-web-guidance", "severity": "low", "confidence": "low", "summary": "Listener/timer accumulation could not be ruled out and the object population grew sharply.", "evidence": "No Detached* constructor appeared in the compact summaries, but closures rose from 9,187 to 65,148 across the baseline/post captures alongside major node growth.", "artifacts": [ "evidence/heap-baseline", "evidence/heap-post-valid" ], "suggestedFix": "Instrument addEventListener, observers and timers during repeated query edits and ensure suggestion handlers and timers are disposed.", "effort": "medium" } ], "taskList": [ { "id": "T-01", "title": "Remove fixed minimum widths, make search/rails intrinsically size to the viewport, and verify 320-400 px reflow.", "priority": 1, "findingIds": [ "F-11" ], "guidanceId": "css-layout", "status": "open" }, { "id": "T-02", "title": "Provide at least 44x44 CSS px targets and robust :focus-visible styles for every custom control.", "priority": 2, "findingIds": [ "F-13" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T-03", "title": "Prioritize the LCP background/content image, reduce discovery delay and avoid competing early work.", "priority": 3, "findingIds": [ "F-15" ], "guidanceId": "performance", "status": "open" }, { "id": "T-04", "title": "Name every dialog, provide meaningful alt or mark decorative images appropriately, and ensure custom controls expose names and roles.", "priority": 4, "findingIds": [ "F-18" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T-05", "title": "Give the page a meaningful H1, repair tree semantics and apply clear :focus-visible treatment to custom controls.", "priority": 5, "findingIds": [ "F-19" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T-06", "title": "Allow user zoom, remove fixed-width overflow and enlarge touch targets without changing visual density unnecessarily.", "priority": 6, "findingIds": [ "F-20" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T-07", "title": "Use real href destinations for navigation, permit zoom/reflow, and align robots policy with the intended public search surfaces.", "priority": 7, "findingIds": [ "F-24" ], "guidanceId": "html", "status": "open" }, { "id": "T-08", "title": "Set nosniff and a deliberate Referrer-Policy, mark all HTTPS cookies Secure, and narrow SameSite=None to cookies that truly require cross-site use.", "priority": 8, "findingIds": [ "F-26" ], "guidanceId": "security", "status": "open" }, { "id": "T-09", "title": "Server-render the core search form, navigation and essential copy, then progressively enhance dynamic feeds.", "priority": 9, "findingIds": [ "F-29" ], "guidanceId": "stabilize-reactive-state", "status": "open" }, { "id": "T-10", "title": "Declare color-scheme and provide prefers-color-scheme or light-dark() tokens for surfaces and controls.", "priority": 10, "findingIds": [ "F-01" ], "guidanceId": "dark-mode", "status": "open" }, { "id": "T-11", "title": "Disable or substantially reduce non-essential slide-up motion inside prefers-reduced-motion: reduce.", "priority": 11, "findingIds": [ "F-02" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T-12", "title": "Use a compact, non-blocking consent treatment with equally prominent choices and preserve immediate access to core content.", "priority": 12, "findingIds": [ "F-09" ], "guidanceId": "light-dismiss-a-dialog", "status": "open" }, { "id": "T-13", "title": "Return an accurate 404 status with a concise message, search field and route back to the homepage.", "priority": 13, "findingIds": [ "F-14" ], "guidanceId": "forms", "status": "open" }, { "id": "T-14", "title": "Consolidate critical CSS, defer non-critical styles/scripts and ensure the LCP resource is discoverable and prioritized.", "priority": 14, "findingIds": [ "F-16" ], "guidanceId": "optimize-image-priority", "status": "open" }, { "id": "T-15", "title": "Code-split optional widgets, remove duplicate/unused bundles and load rewards/discovery features after core search is ready.", "priority": 15, "findingIds": [ "F-17" ], "guidanceId": "break-up-long-tasks", "status": "open" }, { "id": "T-16", "title": "Capture and fix the specific load-time console entries in DevTools/Lighthouse and prevent handled failures from surfacing as errors.", "priority": 16, "findingIds": [ "F-21" ], "guidanceId": "html", "status": "open" }, { "id": "T-17", "title": "Emit width and height or aspect-ratio for every content image and preserve the intended intrinsic ratio.", "priority": 17, "findingIds": [ "F-22" ], "guidanceId": "html", "status": "open" }, { "id": "T-18", "title": "Remove deprecated API usage, publish valid production source maps where policy allows, and clear actionable inspector issues.", "priority": 18, "findingIds": [ "F-23" ], "guidanceId": "html", "status": "open" }, { "id": "T-19", "title": "Delay non-essential analytics and widgets until consent, batch telemetry, and reduce cross-origin requests to the minimum needed for search.", "priority": 19, "findingIds": [ "F-27" ], "guidanceId": "privacy", "status": "open" }, { "id": "T-20", "title": "Add nosniff and a strict Referrer-Policy, expand Permissions-Policy to least privilege, and remove wasm-unsafe-eval unless required.", "priority": 20, "findingIds": [ "F-28" ], "guidanceId": "security", "status": "open" }, { "id": "T-21", "title": "Return a truthful 404 and offer search/retry/home recovery actions.", "priority": 21, "findingIds": [ "F-30" ], "guidanceId": "forms", "status": "open" }, { "id": "T-22", "title": "Use one negotiated modern source per client, responsive srcset/sizes and intrinsic dimensions for content imagery.", "priority": 22, "findingIds": [ "F-31" ], "guidanceId": "deliver-optimized-decorative-images", "status": "open" }, { "id": "T-23", "title": "Defer optional rewards/news/media integrations and set a third-party byte/request budget for first interaction.", "priority": 23, "findingIds": [ "F-32" ], "guidanceId": "efficient-background-processing", "status": "open" }, { "id": "T-24", "title": "Repeat baseline/target/final snapshots in one controlled session with forced GC, then trace retained query-suggestion closures, caches and listeners.", "priority": 24, "findingIds": [ "F-34" ], "guidanceId": "manage-recurring-intervals", "status": "open" }, { "id": "T-25", "title": "Profile the largest retained constructors and lazy-load/dispose optional feed, rewards and suggestion subsystems.", "priority": 25, "findingIds": [ "F-35" ], "guidanceId": "manage-recurring-intervals", "status": "open" }, { "id": "T-26", "title": "Use same-document or cross-document View Transitions for vertical and result-state changes, with reduced-motion handling.", "priority": 26, "findingIds": [ "F-03" ], "guidanceId": "same-document-transitions", "status": "open" }, { "id": "T-27", "title": "Use CSS scroll-driven animation only where position feedback adds value, avoiding scroll listeners.", "priority": 27, "findingIds": [ "F-04" ], "guidanceId": "scrollytelling", "status": "open" }, { "id": "T-28", "title": "Adopt overflow scrolling with scroll-snap and overscroll behavior, retaining accessible previous/next controls.", "priority": 28, "findingIds": [ "F-05" ], "guidanceId": "css-layout", "status": "open" }, { "id": "T-29", "title": "Use scroll-state containers or a lightweight progress affordance where long feeds benefit from position context.", "priority": 29, "findingIds": [ "F-06" ], "guidanceId": "shrinking-header-on-scroll", "status": "open" }, { "id": "T-30", "title": "Progressively enhance popovers and tooltips with CSS anchor positioning and fallback positions.", "priority": 30, "findingIds": [ "F-07" ], "guidanceId": "position-aware-tooltips", "status": "open" }, { "id": "T-31", "title": "Add restrained directional transitions or destination highlights, respecting reduced motion.", "priority": 31, "findingIds": [ "F-08" ], "guidanceId": "same-document-transitions", "status": "open" }, { "id": "T-32", "title": "Use dialog for modal flows and popover for transient UI, with native focus/light-dismiss behavior and accessible names.", "priority": 32, "findingIds": [ "F-10" ], "guidanceId": "declarative-dialog-popover-control", "status": "open" }, { "id": "T-33", "title": "Introduce container queries for the search shell and content rails so components respond to available inline size.", "priority": 33, "findingIds": [ "F-12" ], "guidanceId": "size-aware-styling", "status": "open" }, { "id": "T-34", "title": "Add accurate Organization/WebSite JSON-LD with SearchAction only where it matches visible, functioning behavior.", "priority": 34, "findingIds": [ "F-25" ], "guidanceId": "html", "status": "open" }, { "id": "T-35", "title": "Expose safe structured search/form capabilities and repair semantic/accessibility-tree quality before adding agent tools.", "priority": 35, "findingIds": [ "F-33" ], "guidanceId": "agentic-forms", "status": "open" }, { "id": "T-36", "title": "Instrument addEventListener, observers and timers during repeated query edits and ensure suggestion handlers and timers are disposed.", "priority": 36, "findingIds": [ "F-36" ], "guidanceId": "manage-recurring-intervals", "status": "open" } ], "budget": { "wallClockSeconds": 900, "pathCount": 5, "auditPasses": 1 }, "agent": "pi", "runId": "2026-07-21T02-00-52-738Z" }