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Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

97

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
www.amnh.org/bundles/amnhbase/fonts/amnhserif/AMNHSerif-Variable.woff214400.0 s112.6 KiB
www.amnh.org/bundles/amnhbase/fonts/amnhsans/AMNHSans-Variable.woff214400.0 s106.9 KiB
www.amnh.org/assets/ibexa/build/amnh.js?v=13484dfacf14400.0 s91.5 KiB
/signals/config/344984802502887?v=2.9.303&r=stable&domain...1200.0 s44.8 KiB
www.amnh.org/assets/ibexa/build/amnh-jquery.js?v=13484dfacf14400.0 s31.0 KiB
js.adsrvr.org/up_loader.1.1.0.js0.0 ms12.3 KiB
www.amnh.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?14400.0 s13.0 KiB
pixel.byspotify.com/ping.min.js3600.0 s10.3 KiB
www.amnh.org/assets/ibexa/build/amnh.css?v=13484dfacf604800.0 s74.9 KiB
snap.licdn.com/li.lms-analytics/insight.min.js86400.0 s18.7 KiB
consentag.eu/public/3.1.1/consenTag.js3600.0 s6.9 KiB
try.abtasty.com/69faf49f49c795c18b4527e4a6e0fd15.js30.0 s3.2 KiB
www.amnh.org/bundles/amnhbase/js/global/lazysizes_with_bg.min.js?v=13484dfacf14400.0 s4.3 KiB
www.amnh.org/bundles/amnhbase/images/logos/amnh-logo-white.svg?202314400.0 s3.6 KiB
www.amnh.org/bundles/amnhbase/js/modules/event-cta-carousel.js?v=13484dfacf14400.0 s1.7 KiB
js.adsrvr.org/universal_pixel.js0.0 ms935 B
www.amnh.org/assets/ibexa/build/runtime.js?v=13484dfacf14400.0 s1.3 KiB
www.amnh.org/bundles/amnhbase/js/animation/home/home-hero.js?v=13484dfacf14400.0 s1.1 KiB
/collect?v=2&fmt=js&pid=2647066&time=1776814410189&url=ht...0.0 ms694 B
www.amnh.org/bundles/amnhbase/js/animation/event-cta.js?v=13484dfacf14400.0 s951 B
www.amnh.org/bundles/amnhbase/images/icons/instagram_white.svg14400.0 s950 B
www.amnh.org/bundles/amnhbase/images/icons/youtube_white.svg14400.0 s866 B
www.amnh.org/bundles/amnhbase/js/animation/home/home-membership.js?v=13484dfacf14400.0 s790 B
www.amnh.org/bundles/amnhbase/images/icons/search_lime.svg14400.0 s789 B
www.amnh.org/bundles/amnhbase/images/icons/carat-left_blue.svg14400.0 s743 B
www.amnh.org/bundles/amnhbase/images/icons/search_white.svg14400.0 s652 B
www.amnh.org/bundles/amnhbase/images/icons/checkmark_white.svg14400.0 s643 B
/idsync/ex/receive/check?partner_id=2305&partner_device_i...0.0 ms427 B
www.amnh.org/bundles/amnhbase/images/icons/search_blue.svg14400.0 s606 B
www.amnh.org/bundles/amnhbase/images/icons/search_black.svg14400.0 s593 B
/syncMe?partnerDomain=simpli.fi&idType=cookie&partnerUser...0.0 ms386 B
ps.eyeota.net/match?bid=irm51m1&uid=12498E12077C494E8D40128DDC03CC7F0.0 ms354 B
www.amnh.org/bundles/amnhbase/images/icons/arrow-right_black.svg14400.0 s512 B
www.amnh.org/bundles/amnhbase/images/icons/carat-left_black.svg14400.0 s468 B
www.amnh.org/bundles/amnhbase/images/icons/arrow-left_black.svg14400.0 s458 B
/profiles_engine/ProfilesEngineServlet?at=20&dpi=21243074...0.0 ms218 B
collector-2328.tvsquared.com/tv2track.js0.0 ms190 B
simplifi.partners.tremorhub.com/sync?UISF=71B6E1381C3746468B2F4570919B8C410.0 ms175 B
/tr/?id=344984802502887&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms19 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:11.046 source:map[column:30607 line:2 type:source-location url:https://www.amnh.org/assets/ibexa/build/amnh-jquery.js?v=13484dfacf urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:18.102 source:map[type:text value:[unattributed]]] map[reflowTime:0.292 source:map[column:3131 line:1 type:source-location url:https://www.amnh.org/bundles/amnhbase/js/global/lazysizes_with_bg.min.js?v=13484dfacf urlProvider:network]] map[reflowTime:1.785 source:map[column:184662 line:1 type:source-location url:https://www.amnh.org/assets/ibexa/build/amnh.js?v=13484dfacf urlProvider:network]] map[reflowTime:0.134 source:map[column:184748 line:1 type:source-location url:https://www.amnh.org/assets/ibexa/build/amnh.js?v=13484dfacf urlProvider:network]] map[reflowTime:0.711 source:map[column:266324 line:1 type:source-location url:https://www.amnh.org/assets/ibexa/build/amnh.js?v=13484dfacf urlProvider:network]] map[reflowTime:4.59 source:map[column:171330 line:1 type:source-location url:https://www.amnh.org/assets/ibexa/build/amnh.js?v=13484dfacf urlProvider:network]] map[reflowTime:4.447 source:map[column:51218 line:1 type:source-location url:https://www.amnh.org/assets/ibexa/build/amnh-jquery.js?v=13484dfacf urlProvider:network]] map[reflowTime:1.237 source:map[column:51811 line:1 type:source-location url:https://www.amnh.org/assets/ibexa/build/amnh-jquery.js?v=13484dfacf urlProvider:network]] map[reflowTime:0.171 source:map[column:51894 line:1 type:source-location url:https://www.amnh.org/assets/ibexa/build/amnh-jquery.js?v=13484dfacf urlProvider:network]] map[reflowTime:0.601 source:map[column:51240 line:1 type:source-location url:https://www.amnh.org/assets/ibexa/build/amnh-jquery.js?v=13484dfacf urlProvider:network]]]

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates
value: No additional origins are good candidates for preconnecting

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
www.amnh.org/bundles/amnhbase/js/global/lazysizes_with_bg.min.js?v=13484dfacf4.3 KiB
www.amnh.org/assets/ibexa/build/amnh-jquery.js?v=13484dfacf31.0 KiB80 ms
www.amnh.org/bundles/amnhbase/js/animation/home/home-membership.js?v=13484dfacf790 B
www.amnh.org/bundles/amnhbase/js/animation/home/home-hero.js?v=13484dfacf1.1 KiB
www.amnh.org/bundles/amnhbase/js/modules/event-cta-carousel.js?v=13484dfacf1.7 KiB
www.amnh.org/bundles/amnhbase/js/animation/event-cta.js?v=13484dfacf951 B
try.abtasty.com/69faf49f49c795c18b4527e4a6e0fd15.js3.2 KiB250 ms
www.amnh.org/assets/ibexa/build/amnh.css?v=13484dfacf74.9 KiB160 ms
www.amnh.org/assets/ibexa/build/runtime.js?v=13484dfacf1.3 KiB

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Museum visitors are surrounded by video projections as they stand inside the In… div.home-hero-variant__headlines > div.home-hero-variant-headline > div.home-hero-variant-headline__image > img.lazypreload
/var/ezflow_site/storage/images/media/amnh/home-page-bann...25.5 KiB15.5 KiB
Butterfly perches on a feeder while a child views it through a magnifying glass. div.home-hero-variant__headlines > div.home-hero-variant-headline > div.home-hero-variant-headline__image > img.lazypreload
/var/ezflow_site/storage/images/media/amnh/homepage-banne...19.8 KiB9.8 KiB
Apex stegosaurus fossil mount on display inside the Museum's Gilder Center. div.home-hero-variant__headlines > div.home-hero-variant-headline > div.home-hero-variant-headline__image > img.lazypreload
/var/ezflow_site/storage/images/media/amnh/home-page-bann...17.7 KiB7.8 KiB
Two adults and a child stand at the railing in front of a life-sized Triceratop… div.home-hero-variant__headlines > div.home-hero-variant-headline > div.home-hero-variant-headline__image > img.lazypreload
/var/ezflow_site/storage/images/media/amnh/home-page-bann...15.8 KiB5.8 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 255 ms
URLTime Spent
amnh.org/255 ms
www.amnh.org/0.0 ms

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 100 ms 69.0 KiB
URLTransfer SizeEst Savings
www.amnh.org/assets/ibexa/build/amnh.css?v=13484dfacf74.5 KiB69.0 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 590.7 KiB
URLTransfer SizeEst Savings
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMA.js105.2 KiB81.6 KiB
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMA.js105.2 KiB81.6 KiB
www.googletagmanager.com/gtag/js?id=G-J0SCEJCMH8&cx=c&gtm=4e64h1177.5 KiB65.3 KiB
www.googletagmanager.com/gtag/destination?id=DC-9432320&cx=c&gtm=4e64h1130.8 KiB62.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-NXGG9T172.2 KiB60.9 KiB
www.googletagmanager.com/gtag/destination?id=AW-810443679&cx=c&gtm=4e64h1144.5 KiB57.7 KiB
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMA.js105.2 KiB55.1 KiB
www.amnh.org/assets/ibexa/build/amnh.js?v=13484dfacf91.1 KiB49.1 KiB
try.abtasty.com/69faf49f49c795c18b4527e4a6e0fd15/main.4707d0d4020fb2b8faa4.js66.0 KiB43.3 KiB
connect.facebook.net/en_US/fbevents.js96.5 KiB33.8 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
Two adults and a child stand at the railing in front of a life-sized Triceratop… div.home-hero-variant__headlines > div.home-hero-variant-headline > div.home-hero-variant-headline__image > img.lazypreload
/var/ezflow_site/storage/images/media/amnh/home-page-bann...
Seated visitors view an overhead projection of space. div.home-hero-variant__headlines > div.home-hero-variant-headline > div.home-hero-variant-headline__image > img.lazypreload
/var/ezflow_site/storage/images/media/amnh/home-page-bann...
Apex stegosaurus fossil mount on display inside the Museum's Gilder Center. div.home-hero-variant__headlines > div.home-hero-variant-headline > div.home-hero-variant-headline__image > img.lazypreload
/var/ezflow_site/storage/images/media/amnh/home-page-bann...
Museum visitors are surrounded by video projections as they stand inside the In… div.home-hero-variant__headlines > div.home-hero-variant-headline > div.home-hero-variant-headline__image > img.lazypreload
/var/ezflow_site/storage/images/media/amnh/home-page-bann...
Butterfly perches on a feeder while a child views it through a magnifying glass. div.home-hero-variant__headlines > div.home-hero-variant-headline > div.home-hero-variant-headline__image > img.lazypreload
/var/ezflow_site/storage/images/media/amnh/homepage-banne...
Seated visitors view Passport to the Universe adapted for the giant screen insi… div.home-hero-variant__headlines > div.home-hero-variant-headline > div.home-hero-variant-headline__image > img.lazypreload
/var/ezflow_site/storage/images/media/amnh/home-page-bann...
Complete fossil skeleton of Tyrannosaurus rex stands on its hind legs with skul… div.amnh-footer-image > div.amnh-footer-image__trex > picture > img.img-fluid
data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
Google Play Logo div.amnh-footer__downloads > a.download-item > picture > img.lazyload
data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
Satellite hovers over the interior of the Hayden Planetarium where seated Museu… div.zone-stack > div.home-membership > div.home-membership__image > img.lazyload
Apple Store Logo div.amnh-footer__social > div.amnh-footer__downloads > a.download-item > img.lazyload
American Museum Of Natural History Logo div.amnh-footer__content > div.amnh-footer__info > div.amnh-footer__logo > img.lazyload

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Max Potential First Input Delay 70 ms
●Layout shift culprits
●Optimize DOM size
●Font display
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Avoids enormous network payloads Total size was 2,291 KiB
●User Timing marks and measures 12 user timings
●JavaScript execution time 0.6 s
●Minimizes main-thread work 1.1 s
●Avoid long main-thread tasks 3 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 170 ms
●Server Backend Latencies 160 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 120 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
○LCP request discovery
○Avoid non-composited animations
82

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

ARIA

Focusable descendents within an `[aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how `aria-hidden` affects focusable elements.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
FESTIVAL Saturday, May 2, 2026 Mead Film Festival: Saturday div.amnh-event-cta-carousel__slider > div.slick-list > div.slick-track > a.amnh-event-cta
FESTIVAL Sunday, May 3, 2026 Mead Film Festival: Sunday div.amnh-event-cta-carousel__slider > div.slick-list > div.slick-track > a.amnh-event-cta
EVENT Sunday, May 3, 2026  Free Writing Workshop with Tanya Barfield div.amnh-event-cta-carousel__slider > div.slick-list > div.slick-track > a.amnh-event-cta
MEMBER PROGRAM Saturday, May 9, and Sunday May 10, 2026 Member Morning Hours div.amnh-event-cta-carousel__slider > div.slick-list > div.slick-track > a.amnh-event-cta
MEMBER PROGRAM Saturday, May 9, and Sunday May 10, 2026 Member Storytime div.amnh-event-cta-carousel__slider > div.slick-list > div.slick-track > a.amnh-event-cta
EVENT Sunday, May 17, 2026 OrigamiUSA: May Special Folding Fun Session div.amnh-event-cta-carousel__slider > div.slick-list > div.slick-track > a.amnh-event-cta
BENEFIT EVENT Tuesday, May 19, 2026 Catalyst Dinner: A Benefit for the American… div.amnh-event-cta-carousel__slider > div.slick-list > div.slick-track > a.amnh-event-cta
PLANETARIUM PROGRAM Thursday, May 28, 2026 Astronomy Live: When A Star is Born div.amnh-event-cta-carousel__slider > div.slick-list > div.slick-track > a.amnh-event-cta

Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
American Museum of Natural History main content. body > div.amnh-page-wrapper > div#pageWrapper

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.amnh-event-cta-carousel__wrapper > div.amnh-event-cta-carousel__content > div.amnh-event-cta-carousel__navigation > button.amnh-event-cta-carousel__arrow div.amnh-event-cta-carousel__wrapper > div.amnh-event-cta-carousel__content > div.amnh-event-cta-carousel__navigation > button.amnh-event-cta-carousel__arrow

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
head > meta head > meta

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Image elements have `[alt]` attributes
●ARIA attributes are used as specified for the element's role
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
●Skip links are focusable.
●Document has a main landmark.
●Deprecated ARIA roles were not used
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○Elements with visible text labels have matching accessible names.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
77

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
SharedStorage
www.amnh.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
www.amnh.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge
www.amnh.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
AttributionReporting
snap.licdn.com/li.lms-analytics/insight.min.js

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.amnh.org/manifest.webmanifest
Failed to load resource: the server responded with a status of 403 ()
www.amnh.org/manifest.webmanifest
Failed to load resource: the server responded with a status of 403 ()
bcp.crwdcntrl.net/map/c=7625/tp=SIMP/tpid=410AA1FEDB544700BC5BA1D2CE44C460
Failed to load resource: the server responded with a status of 404 ()
idsync.rlcdn.com/419566.gif?partner_uid=4CF08FCF32644EFB8881F8B3D8CC4B25
Failed to load resource: the server responded with a status of 451 ()
www.amnh.org/
Manifest fetch from https://www.amnh.org/manifest.webmanifest failed, code 403
www.amnh.org/
Manifest fetch from https://www.amnh.org/manifest.webmanifest failed, code 403
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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