Manifest position 638 · CrUX rank bucket 1000

https://telegram.org

Coverage complete

Coverage-complete audit of six representative public paths. Excluded: individual localized duplicates and every historical article because they share audited templates; linked external app sites and core.telegram.org are separate origins/products.

Attempts

1 / 3

Judged checks

58 / 58

Blocked

Not run

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

All 58 atomic check outcomes

Principle / check	Status	Confidence	Evidence or reason
respect-user-preferences `respects-color-scheme`	issues	high	Dark emulation remained white and color-scheme was normal. F01 medium: The site does not follow the system dark-color preference.
respect-user-preferences `respects-reduced-motion`	issues	high	500 ms logo/theme animation remained under reduced-motion emulation. F02 medium: Theme motion still runs when reduced motion is requested.
respect-user-preferences `respects-contrast`	pass	high	Native high-contrast emulation preserved readable controls; Lighthouse identified normal-theme contrast separately.
implement-natural-interactions `view-transitions`	pass	high	Theme state change uses named View Transitions; standard MPA link navigation remained predictable.
implement-natural-interactions `scroll-driven-animations`	not-applicable	high	No scroll-linked parallax, reveal, carousel, or scrollytelling interaction exists on the representative templates.
implement-natural-interactions `physical-gestures`	not-applicable	high	The public reference templates expose links and standard scrolling, with no custom swipe, pull, drag, or snap interaction.
provide-guided-navigation `scroll-state-aware-chrome`	pass	high	Persistent navigation and the FAQ in-page link index retain orientation on long pages.
provide-guided-navigation `anchored-positioning`	pass	high	The compact language menu remains attached to its trigger at the tested desktop and mobile edges.
provide-guided-navigation `directs-attention`	pass	high	Active navigation receives a visible underline and FAQ links lead directly to named sections.
maximize-content-reduce-noise `no-intrusive-interruptions`	pass	high	No load-time modal, consent wall, or content-obscuring interstitial appeared on any representative path.
maximize-content-reduce-noise `semantic-dismissible-primitives`	issues	high	Language overlay is custom onclick/href=# markup; no popover, dialog, or details was present. F03 low: The language menu is an ad-hoc dropdown rather than a semantic disclosure or popover.
maximize-content-reduce-noise `reduced-chrome`	pass	high	Screenshots show content-first pages with a compact single-row header and restrained decoration.
adapt-to-the-form-factor `responsive-no-horizontal-scroll`	pass	high	At 360x800, layout reported scrollWidth 360, innerWidth 360, overflow 0 and viewport meta present.
adapt-to-the-form-factor `component-level-responsiveness`	pass	high	Navigation, news, app lists, and article media reflowed to the narrow container without clipping.
adapt-to-the-form-factor `input-modality-aware`	pass	high	Primary navigation targets are 48-50 px high and most keyboard-focused links retain a browser-visible 5 px focus ring.
support-core-task-success `clear-purpose-and-primary-action`	pass	high	Homepage states Telegram messaging purpose and exposes platform download choices; Apps groups the choices by platform.
support-core-task-success `primary-flow-completion`	pass	high	The Home to Apps journey reached labeled Android, iOS, desktop, macOS, and web download destinations without an account wall.
support-core-task-success `clear-system-state-and-recovery`	issues	high	Invalid route returned HTTP 200 homepage with no not-found state. F04 high: Unknown URLs return a soft 404 with no recovery message.
be-fast-and-stable `good-core-web-vitals`	issues	high	Lighthouse mobile LCP was 3.9 s; CLS 0 and TBT 0 ms. F05 high: Mobile Largest Contentful Paint misses the good threshold.
be-fast-and-stable `visual-stability`	pass	high	Mobile layout observer measured CLS 0 with no shifts; Lighthouse also measured CLS 0.
be-fast-and-stable `efficient-main-thread`	pass	high	Lighthouse TBT was 0 ms; raw trace had one 189 ms task and 139 ms TBT, with no repeated long-task pattern.
be-fast-and-stable `efficient-resource-delivery`	issues	high	HAR and image audit show 665 KB images, missing dimensions/srcset/lazy loading, and render-blocking styles. F09 medium: Images are delivered without responsive sizing, intrinsic dimensions, or below-fold lazy loading.
be-fast-and-stable `trim-unused-and-duplicate-code`	issues	high	Lighthouse found 26 KiB / 84.7% of telegram.css unused on Home. F15 low: A mostly unused global stylesheet is render-blocking.
be-inclusive `names-roles-labels`	issues	high	Lighthouse failed image-alt and link-name; image audit corroborated missing alt. F06 high: Important images and one linked logo lack accessible alternatives.
be-inclusive `sufficient-contrast`	issues	high	Lighthouse measured navigation link contrast at 3.89:1. F07 medium: Primary blue navigation text does not meet minimum contrast.
be-inclusive `structure-and-focus`	issues	high	No landmarks across tested templates; heading order skipped levels and Safety had empty headings. F08 medium: Document structure lacks landmarks and has skipped or empty headings.
be-inclusive `legible-text`	pass	high	Mobile and desktop screenshots show readable line lengths, wrapping, spacing, and no clipping.
be-inclusive `zoom-reflow-targets-and-media`	issues	high	Mobile reflow succeeds, but article/FAQ media omit alt, controls, and text tracks. F16 medium: Article and support media lack complete text alternatives and playback controls.
follow-best-practices `no-console-errors`	pass	high	Lighthouse errors-in-console audit passed.
follow-best-practices `sound-document-and-assets`	issues	high	Lighthouse best practices was 1.0, but direct image inspection found missing intrinsic dimensions across Home and Article. F09 medium: Images are delivered without responsive sizing, intrinsic dimensions, or below-fold lazy loading.
follow-best-practices `browser-platform-hygiene`	pass	high	Lighthouse passed BFCache, deprecations, inspector issues, source maps, paste prevention, and permission-on-load audits.
be-discoverable `title-and-description`	issues	high	Titles exist, but all tested templates omit meta descriptions. F10 medium: Public templates omit standard meta descriptions.
be-discoverable `crawlable-and-mobile-friendly`	pass	high	Viewport meta and real href links are present; raw HTML exposes 100% rendered content words.
be-discoverable `canonical-and-indexing-signals`	issues	high	robots.txt and sitemap.xml returned 404, most routes lack canonical/hreflang, and missing routes soft-404. F11 medium: Indexing signals are incomplete and unknown routes are indexable soft 404s.
be-discoverable `structured-and-shareable-metadata`	issues	high	Open Graph metadata is present, but article and organization pages expose no JSON-LD structured entities. F11 medium: Indexing signals are incomplete and unknown routes are indexable soft 404s.
be-private-and-secure `secure-transport-and-headers`	issues	high	HTTPS/HSTS are present, but CSP and nosniff are absent. F12 high: Several browser-enforced security policies are absent.
be-private-and-secure `data-minimisation-and-third-parties`	pass	high	HAR recorded zero third-party requests; trackers found no known tracker and secrets scan found none.
be-private-and-secure `in-context-permissions-and-modern-auth`	not-applicable	high	The audited public informational and download pages do not request permissions and expose no authentication flow.
be-private-and-secure `defensive-browser-policies`	issues	high	CSP, nosniff, Referrer-Policy and Permissions-Policy are missing; HSTS and SAMEORIGIN are present. F12 high: Several browser-enforced security policies are absent.
be-resilient `progressive-enhancement`	pass	high	Discoverability fetch showed HTTP 200 raw HTML with 100% rendered-word coverage and no empty JS shell.
be-resilient `resilient-runtime-behaviour`	pass	high	Representative static pages and dropdown navigation rendered without clipped overlays or fragile loading shells.
be-resilient `offline-and-installable`	not-applicable	high	Telegram.org is a public brochure/reference and download site, not the Telegram web application; installability belongs to linked app products.
be-resilient `network-and-http-failure-states`	issues	high	Unknown route returned a misleading 200 homepage rather than a recoverable error state. F04 high: Unknown URLs return a soft 404 with no recovery message.
be-internationalised `lang-dir-and-logical-properties`	issues	high	Every representative template had empty html lang and dir despite many locale options. F13 medium: Localized pages do not declare their language or direction.
be-internationalised `locale-aware-data`	pass	high	The server exposes explicit locale variants and localized navigation; date labels are rendered as content rather than fragile client-side date math.
be-internationalised `time-zone-correctness`	not-applicable	high	The audited site renders publication dates only and has no times, scheduled events, durations, or time-zone-sensitive user input.
be-trustworthy `no-dark-patterns`	pass	high	No consent wall, upsell, disguised advertisement, forced continuity, or confirmshaming appeared on the representative paths.
be-trustworthy `humane-error-handling`	not-applicable	high	No user-input forms are present on the audited public templates.
be-trustworthy `trustworthy-input-assistance`	not-applicable	high	No address, payment, sign-in, sign-up, or other input field is present.
be-trustworthy `safe-commercial-and-account-flows`	not-applicable	high	No checkout, subscription, account, consent, or authentication flow is hosted on these public pages.
be-sustainable `optimised-assets`	issues	high	Homepage uses WebP, but two large below-fold images lack responsive sources and intrinsic sizing. F09 medium: Images are delivered without responsive sizing, intrinsic dimensions, or below-fold lazy loading.
be-sustainable `no-wasteful-work`	pass	high	HAR found no third-party background requests and trace found no sustained long-task activity.
be-sustainable `third-party-and-media-budget`	issues	high	Safety autoplays a muted control-free video; Home transfers 37 KB media before user interaction. F14 low: The Safety page autoplays background video.
be-agent-ready `structured-agent-capabilities`	not-applicable	high	This public informational/download site exposes content and outbound downloads, not a transactional agent tool surface.
be-agent-ready `on-device-inference`	not-applicable	high	No summarization, generation, or other inference task is part of the public site experience.
be-memory-efficient `no-leak-under-repeated-interaction`	pass	high	After ten real theme toggles, heap grew only 121,033 B (0.42%) and no Detached constructor entered the summary.
be-memory-efficient `bounded-footprint`	pass	high	Baseline heap was 28,981,761 B across 68,859 nodes, proportionate to the media-rich landing page.
be-memory-efficient `no-detached-dom-or-unbounded-listeners`	pass	high	Neither baseline nor post-interaction heap summaries listed Detached constructors; ten toggles showed bounded growth.

Provenance

Canonical report: results/atomic/reports/0638-telegram_org.json
Report SHA-256: 6181aad7b87879bb308807e9eb1d97b916a0883c7a6d21ebc211f461d97413a8
Local retained report: runs/2026-07-17T17-27-24-856Z/atomic-reports/telegram_org/2026-07-22T02-16-33-859Z/report.json
Local evidence root: runs/2026-07-17T17-27-24-856Z/atomic-reports/telegram_org/2026-07-22T02-16-33-859Z
Catalog SHA-256: sha256:78ccfdb2d483f4c57d9dafed80fd86c6265585a56457c8dcfddc254b80fb44d7

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