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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

25

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
/filer_public/04/60/046048bd-5c96-462e-a77f-703f81264e9f/...86400.0 s10.0 MiB
a.pub.network/smithsonianmag-com/prebid.js1800.0 s198.0 KiB
a.pub.network/smithsonianmag-com/pubfig.engine.mobile.js1800.0 s151.6 KiB
html-load.cc/script/d3d3LnNtaXRoc29uaWFubWFnLmNvbQ.js300.0 s129.7 KiB
/hVRgdIzr6IEhzR17vYBT4fCVj70=/fit-in/1300x269/filters:no_...86400.0 s274.0 KiB
/scripts/dee4d2d8df6d5ee1e0dd360dd1101e3a6e90b2c86655ba04...3600.0 s136.5 KiB
cdn.tinypass.com/api/tinypass.min.js14400.0 s132.7 KiB
storage.cloud.kargo.com/ad/network/tag/v3/_rZze57sknyo0IKCwhYtZzBgy.js1800.0 s101.6 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
c.amazon-adsystem.com/aax2/apstag.js3600.0 s91.0 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js3600.0 s73.1 KiB
/Nk9x2-Za5Vbd4n7ibuHQfxpOUKg=/fit-in/320x266/filters:no_u...86400.0 s118.8 KiB
cdn.cookielaw.org/scripttemplates/202407.2.0/otBannerSdk.js86400.0 s109.9 KiB
cdn.p-n.io/pushly-sdk.min.js?domain_key=hn5lNDNFJqLiqyK5HrYDmcyK8qRE6OSqKsZr300.0 s45.2 KiB
/mZGLg6N01CK8OVEyHYat4b9p5QY=/600x600/https://tf-cmsv2-sm...86400.0 s107.4 KiB
/FdJ78iZHGHz83diAB618C_F3kNA=/600x600/https://tf-cmsv2-sm...86400.0 s101.1 KiB
/2KlR3wPVIDvVDDCJpJyhiyZZ7zU=/600x600/https://tf-cmsv2-sm...86400.0 s99.4 KiB
/signals/config/452270575524133?v=2.9.303&r=stable&domain...1200.0 s44.5 KiB
/ztB9HaV92cZY5_wxGAX2fnFKnkI=/600x600/https://tf-cmsv2-sm...86400.0 s90.5 KiB
ads.pubmatic.com/AdServer/js/pwt/156512/6397/pwt.js122662.0 s97.2 KiB
cdn.cxense.com/cx.js3600.0 s38.1 KiB
cdn.cxense.com/cx.js3600.0 s38.1 KiB
btloader.com/tag?o=5714937848528896&upapi=true300.0 s30.7 KiB
cdn.id5-sync.com/api/1.0/id5-api.js3600.0 s34.5 KiB
a.pub.network/smithsonianmag-com/pubfig.min.js1800.0 s26.3 KiB
secure.cdn.fastclick.net/js/pubcid/latest/pubcid.min.js900.0 s21.7 KiB
b-code.liadm.com/a-07gi.min.js86400.0 s46.9 KiB
/pagead/managed/js/adsense/m202604200101/show_ads_impl_fy...1209600.0 s177.5 KiB
/EwJCRw5KD15ZEY6XTzrdlmemJmw=/450x300/filters:no_upscale(...86400.0 s42.1 KiB
/signals/config/784323455034815?v=2.9.303&r=stable&domain...1200.0 s16.1 KiB
/signals/config/538226103776412?v=2.9.303&r=stable&domain...1200.0 s16.0 KiB
scripts.clarity.ms/0.8.59/clarity.js86400.0 s26.2 KiB
/jload?advId=1102&anId=931662&campId=14083&chanId=_eTCBuU...604800.0 s92.3 KiB
/1FkuQmDrcZ8TuOIFdny3IXxzv_w=/500x0/filters:no_upscale()/...86400.0 s23.0 KiB
/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/...14400.0 s11.9 KiB
cdn.cookielaw.org/logos/static/ot_company_logo.png86400.0 s19.2 KiB
p.ad.gt/api/v1/p/47414400.0 s10.4 KiB
freestar.solutions.cdn.optable.co/public-assets/freestar-sdk.js86400.0 s16.6 KiB
/jsconfig/jload/931662?cbName=__IntegralAS__4352&advId=11...0.0 ms6.0 KiB
/H8d1B8__uIefY5e89fnhyV3b8us=/314x210/filters:no_upscale(...86400.0 s14.6 KiB
kit.fontawesome.com/c31205bd70.js60.0 s5.6 KiB
config.aps.amazon-adsystem.com/configs/0ab198dd-b265-462a-ae36-74e163ad61593600.0 s6.8 KiB
cdn.cxense.com/cx.cce.js3600.0 s6.8 KiB
tags.crwdcntrl.net/lt/c/16576/sync.min.js86400.0 s13.1 KiB
eus.rubiconproject.com/usync.js70011.0 s11.5 KiB
/Ey7c-D5EHsp-69e7bsvXT-pSR2I=/150x150/filters:focal(2856x...86400.0 s10.8 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...86400.0 s10.7 KiB
a.pub.network/core/prebid-universal-creative.js86400.0 s10.1 KiB
/scripttemplates/otSDKStub.js?did=e9be9ebf-eaa9-42f6-aa54...86400.0 s9.1 KiB
a.ad.gt/api/v1/u/matches/474?_it=freestar7200.0 s4.5 KiB
/mSzJapexr7mMtXVoZ9RsM43Yljg=/256x256/https://tf-cmsv2-sm...86400.0 s8.3 KiB
/00608tACb9oPLLLS0mP3UuBjYFQ=/150x150/filters:focal(1200x...86400.0 s8.1 KiB
a.pub.network/core/puc/banner.js3600.0 s3.8 KiB
tag.bounceexchange.com/5432/i.js60.0 s2.9 KiB
/B5gmEY5Y1GLEV-5l-Ry43qMMNEM=/150x150/filters:focal(2250x...86400.0 s6.4 KiB
assets.bounceexchange.com/cache/5432/website-24d7a6f79ab7249631d4788c4a490dd3.js120.0 s2.6 KiB
/cDG-lVQt4AePTX-fRGUv7UvSGcE=/100x100/filters:focal(1500x...86400.0 s6.3 KiB
/EbCf0Y4YoRWJLgrJmqZMjRyGEhE=/100x100/filters:focal(2806x...86400.0 s5.5 KiB
/pvo1g64eV2Xvr7R0vBRIuewhzu4=/150x150/filters:focal(1000x...86400.0 s5.4 KiB
experience.piano.io/xbuilder/experience/load?aid=lqcP1jI8pu1800.0 s2.4 KiB
/HYXKC5Rk57Auz-NoPhOau4lU1zU=/150x150/filters:focal(4082x...86400.0 s5.1 KiB
/pbSbeE3FxhYc17VIqO6JwOV1cHU=/150x150/filters:focal(1916x...86400.0 s4.7 KiB
/hadron.js?url=https%3A%2F%2Fwww.smithsonianmag.com%2F&re...432000.0 s12.4 KiB
/dd4ba86f-c813-4a11-a5bf-ba1300da69f0/launchpad-liveramp.js0.0 ms1.7 KiB
cdn-ima.33across.com/ima.js259200.0 s6.9 KiB
/YAQzkOEnorIYwIrBQjyfWdk8Ln8=/100x100/filters:focal(960x6...86400.0 s2.8 KiB
/state/js?website_id=5432&device_id=1742525189332993098&v...0.0 ms1.0 KiB
id5-sync.com/c/882/0/8/1.gif?gdpr=0&gdpr_consent=&us_privacy=0.0 ms1.0 KiB
/c/441/441/9/1.gif?puid=u_48b07113-0cee-4679-821f-47d72bf...0.0 ms1.0 KiB
/c/441/441/9/1.gif?puid=u_e166c944-edad-41dc-aece-2404701...0.0 ms1.0 KiB
/c/441/441/9/1.gif?puid=u_0abd628d-2fc0-4fbc-a2d3-a9eb839...0.0 ms1.0 KiB
/c/441/441/9/1.gif?puid=u_4401d585-2a57-4a7d-ac82-cb1e99e...0.0 ms1.0 KiB
/c/441/441/9/1.gif?puid=u_a5dbb891-4996-459b-8868-30689ec...0.0 ms1.0 KiB
cdn.cookielaw.org/logos/static/powered_by_logo.svg86400.0 s2.5 KiB
/dcsdkophrbdzpxrpxzapkqhng_1y8w/dcs.gif?dcsredirect=1&dcs...0.0 ms982 B
a.pub.network/core/imgs/freestar_close_button.svg3600.0 s1.1 KiB
tpc.googlesyndication.com/pagead/js/r20260420/r20110914/abg_lite_fy2021.js1209600.0 s8.7 KiB
config.aps.amazon-adsystem.com/configs/e5a6f2d1-7642-4cc5-a917-96dbe8c3ed8f3600.0 s871 B
sli.smithsonianmag.com/baker?dtstmp=17767992914970.0 ms544 B
sli.smithsonianmag.com/baker?dtstmp=17767992975210.0 ms542 B
a.pub.network/core/imgs/1.png?x=2026-04-21T19%3A21%3A25.1083600.0 s642 B
sync.cootlogix.com/api/cookie?partnerId=rubiconut&userId=MO90F7RF-27-AZXS0.0 ms496 B
/Repo/rep.gif?ver=3.3.0&typ=pgv&rnd=mo90f2r85beqsey2&sid=...0.0 ms413 B
/usersync/liveintent/?cb=%2F%2Fi.liadm.com%2Fs%2F35004%3F...0.0 ms405 B
/usersync/sharethrough?cb=https%3A%2F%2Fmatch.sharethroug...0.0 ms405 B
/track/cmb/generic?ttd_pid=sharethrough&ttd_tpi=1&gdpr=0&...0.0 ms255 B
/track/cmb/generic?ttd_pid=8gkxb6n&ttd_tpi=1&ttd_puid=AU1...0.0 ms254 B
/track/cmb/generic?ttd_pid=tapad&ttd_tpi=1&ttd_puid=d9afe...0.0 ms254 B
match.adsrvr.org/track/cmb/generic?ttd_pid=liveintent&ttd_tpi=1&gdpr=00.0 ms254 B
/track/cmb/generic?ttd_pid=tapad&ttd_tpi=1&ttd_puid=fa40c...0.0 ms254 B
/track/cmb/generic?ttd_pid=yieldmo&ttd_tpi=1&ttd_puid=wcr...0.0 ms254 B
/track/cmb/generic?ttd_pid=tapad&ttd_tpi=1&ttd_puid=5ec42...0.0 ms254 B
/track/cmb/generic?ttd_pid=yieldmo&ttd_tpi=1&ttd_puid=wcr...0.0 ms254 B
/track/cmb/generic?ttd_pid=sirnsvg&ttd_tpi=1&gdpr=0&gdpr_...0.0 ms253 B
/track/cmb/generic?ttd_pid=3wvez9v&ttd_tpi=1&ttd_puid=68b...0.0 ms253 B
ids4.ad.gt/api/v1/ip_match?id=AU1D-0100-001776799292-P5VAYICB-LPUA0.0 ms245 B
/ul_cb/ux?&publisher_dmp_id=15&r=https%3A%2F%2Fids.ad.gt%...0.0 ms198 B
/insync?us_privacy=&vxii_pdid=a75ae0e4-97f9-5ad4-6086-083...0.0 ms139 B
cdn.indexww.com/ht/htw-pixel.gif?086400.0 s246 B
/AdServer/ImgSync?p=160318&gdpr=&gdpr_consent=&pu=https%3...0.0 ms40 B
/tr/?id=452270575524133&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms19 B
/p.css?s=1&k=fvn3yjf&ht=tk&f=139.140.175.176.17997.17998....604800.0 s172 B
/tr/?id=784323455034815&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms16 B
/tr/?id=538226103776412&ev=PageView&dl=https%3A%2F%2Fwww....0.0 ms16 B
c.amazon-adsystem.com/aax2/apstag.js3600.0 s0 B
/pagead/managed/js/activeview/current/ufs_web_display.js3600.0 s0 B
/pagead/managed/js/activeview/current/ufs_web_display.js3600.0 s0 B
eus.rubiconproject.com/usync.js70011.0 s0 B
eus.rubiconproject.com/usync.js70011.0 s0 B
eus.rubiconproject.com/usync.js70011.0 s0 B
cdn.indexww.com/ht/htw-pixel.gif?086400.0 s0 B
cdn.indexww.com/ht/htw-pixel.gif?086400.0 s0 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.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
/af/fdedcb/00000000000000007735d96e/31/l?primer=f592e0a4b...45 ms
/af/dd5f5e/00000000000000007735d944/31/l?primer=f592e0a4b...40 ms
/af/38ea3a/00000000000000007758cf7d/31/l?primer=f592e0a4b...35 ms
/af/f9b025/00000000000000007735d96d/31/l?primer=f592e0a4b...25 ms
ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-sharp-regular-400-15.woff225 ms
ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-brands-400-0.woff220 ms
ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-brands-400-2.woff220 ms
/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oLlVnmh...20 ms
/s/roboto/v51/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DP...20 ms
/af/d7ff92/00000000000000007735e609/31/l?primer=f592e0a4b...15 ms
ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-sharp-solid-900-0.woff215 ms
ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-regular-400-11.woff215 ms
ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-sharp-solid-900-17.woff215 ms
/af/5be242/00000000000000007735e603/31/l?primer=f592e0a4b...10 ms

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:23.541 source:map[column:73398 line:2 type:source-location url:https://scripts.clarity.ms/0.8.59/clarity.js 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:131.931 source:map[type:text value:[unattributed]]] map[reflowTime:1.258 source:map[column:18 line:358 type:source-location url:https://www.smithsonianmag.com/static/ads/freestar.bundle.4bc26fb98137.js urlProvider:network]] map[reflowTime:6.776 source:map[column:64 line:2314 type:source-location url:https://www.smithsonianmag.com/ urlProvider:network]] map[reflowTime:2.12 source:map[column:241855 line:18 type:source-location url:https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js urlProvider:network]] map[reflowTime:7.029 source:map[column:412827 line:0 type:source-location url:https://a.pub.network/smithsonianmag-com/pubfig.engine.mobile.js urlProvider:network]] map[reflowTime:5.015 source:map[column:400730 line:0 type:source-location url:https://cdn.tinypass.com/api/tinypass.min.js urlProvider:network]] map[reflowTime:23.541 source:map[column:31518 line:1 type:source-location url:https://scripts.clarity.ms/0.8.59/clarity.js urlProvider:network]] map[reflowTime:0.109 source:map[column:45016 line:5 type:source-location url:https://cdn.cxense.com/cx.js urlProvider:network]] map[reflowTime:27.966 source:map[column:329901 line:1 type:source-location url:https://storage.cloud.kargo.com/ad/network/tag/v3/_rZze57sknyo0IKCwhYtZzBgy.js urlProvider:network]] map[reflowTime:3.206 source:map[column:224599 line:1 type:source-location url:https://storage.cloud.kargo.com/ad/network/tag/v3/_rZze57sknyo0IKCwhYtZzBgy.js urlProvider:network]]]

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
A festivalgoer shows a child how to "grunt" for earthworms. div.article-list-item > div.article-list-text > a > img
/filer_public/04/60/046048bd-5c96-462e-a77f-703f81264e9f/...10.0 MiB9.9 MiB
  image div > div.full-width-with-graphic > a > img.mobileImage
/Nk9x2-Za5Vbd4n7ibuHQfxpOUKg=/fit-in/320x266/filters:no_u...118.2 KiB104.4 KiB
div#celtra-object-8977 > div#celtra-object-8978 > div#celtra-object-8984 > img div#celtra-object-8977 > div#celtra-object-8978 > div#celtra-object-8984 > img
/api/blobs/e6aaf3051aac1bd0039cf2056e6f03dd011a700ab1db56...88.3 KiB55.4 KiB
Amud 7 was discovered in a cave in Israel in 1992. div.article-list-item > div.article-list-text > a > img
/EwJCRw5KD15ZEY6XTzrdlmemJmw=/450x300/filters:no_upscale(...41.6 KiB19.6 KiB
div#celtra-object-8977 > div#celtra-object-8978 > div#celtra-object-8982 > img div#celtra-object-8977 > div#celtra-object-8978 > div#celtra-object-8982 > img
/api/blobs/ce0c63ed4f8bfd5a4c39009ab89593c5d5af7a541bb31d...42.2 KiB11.7 KiB
A festivalgoer shows a child how to "grunt" for earthworms. div.content-list-image > a > picture > img
/Ey7c-D5EHsp-69e7bsvXT-pSR2I=/150x150/filters:focal(2856x...10.4 KiB6.8 KiB
div#celtra-object-8977 > div#celtra-object-8978 > div#celtra-object-10117 > img div#celtra-object-8977 > div#celtra-object-8978 > div#celtra-object-10117 > img
/api/blobs/d61da206053dd3290be5958e4b6601d2d9227642b8cc2f...8.4 KiB4.3 KiB
Students at Anne Wien Elementary School in Fairbanks pilot test the Fresh Eyes … div.content-list-image > a > picture > img
/00608tACb9oPLLLS0mP3UuBjYFQ=/150x150/filters:focal(1200x...7.8 KiB4.1 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG
nodeLabel: A festivalgoer shows a child how to "grunt" for earthworms.
path: 1,HTML,1,BODY,6,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,IMG
selector: div.article-list-item > div.article-list-text > a > img
snippet: <img src="https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer_public/04/60/…" alt="A festivalgoer shows a child how to &amp;quot;grunt&amp;quot; for earthworms." width="640" height="480">

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
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

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
/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600...882 B851 ms
/css2?family=Open+Sans:ital,wght@0,300;0,400;0,600;0,700;...2.8 KiB176 ms
kit.fontawesome.com/c31205bd70.js5.6 KiB769 ms
use.typekit.net/fvn3yjf.css1.3 KiB771 ms
/p.css?s=1&k=fvn3yjf&ht=tk&f=139.140.175.176.17997.17998....172 B763 ms

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

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

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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: 949 ms
URLTime Spent
smithsonianmag.com/949 ms
www.smithsonianmag.com/0.0 ms

Diagnostics

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 650 ms 220.0 KiB
URLTransfer SizeEst Savings
www.smithsonianmag.com/static/ads/freestar.bundle.4bc26fb98137.js250.0 KiB138.7 KiB
/static/smithsonianmag/smithsonianmag.bundle.d65b5f619e49.js91.3 KiB44.3 KiB
www.smithsonianmag.com/static/smithsonianmag/js/freestar-block.ccab75bb8d68.js21.3 KiB14.3 KiB
launchpad.privacymanager.io/latest/launchpad.bundle.js40.2 KiB12.7 KiB
www.smithsonianmag.com/static/js/webtrends.min.85eb1685dba0.js10.9 KiB6.7 KiB
/static/smithsonianmag/js/freestar-adshield.1d64932a8bde.js5.2 KiB3.2 KiB

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: 220 ms 179.2 KiB
URLTransfer SizeEst Savings
/*! * Font Awesome Pro 7.2.0 by @fontawesome - https://fontawesome.com * License - https://fontaw…99.2 KiB97.9 KiB
www.smithsonianmag.com/static/smithsonianmag/smithsonianmag.2f655b1c8e11.css58.2 KiB53.4 KiB
18.1 KiB17.8 KiB
/*! * Font Awesome Pro 7.2.0 by @fontawesome - https://fontawesome.com * License - https://fontaw…10.1 KiB10.1 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: 1.7 s 1.5 MiB
URLTransfer SizeEst Savings
/pagead/managed/js/adsense/m202604200101/show_ads_impl_fy...177.5 KiB127.1 KiB
/pagead/managed/js/gpt/m202604160201/pubads_impl.js187.7 KiB92.4 KiB
www.smithsonianmag.com/static/ads/freestar.bundle.4bc26fb98137.js250.0 KiB92.3 KiB
html-load.cc/script/d3d3LnNtaXRoc29uaWFubWFnLmNvbQ.js129.0 KiB88.8 KiB
cdn.tinypass.com/api/tinypass.min.js132.1 KiB82.7 KiB
www.googletagservices.com/tag/js/gpt.js108.1 KiB76.6 KiB
www.googletagmanager.com/gtag/destination?id=G-XXXXXXXXXX&cx=c&gtm=4e64h1h1136.7 KiB72.4 KiB
/assets/smart-tag/versioned/main-v2_567848e754a175dbe6219...116.1 KiB63.8 KiB
a.pub.network/smithsonianmag-com/pubfig.engine.mobile.js151.1 KiB62.5 KiB
cdn.cookielaw.org/scripttemplates/202407.2.0/otBannerSdk.js109.7 KiB62.1 KiB
a.pub.network/smithsonianmag-com/prebid.js197.5 KiB60.4 KiB
www.googletagmanager.com/gtm.js?id=GTM-T62VWK2171.1 KiB60.3 KiB
www.googletagmanager.com/gtag/js?id=G-MLMSZSFHWL&cx=c&gtm=4e64h1h1163.9 KiB56.8 KiB
www.googletagmanager.com/gtag/js?id=DC-9202818&cx=c&gtm=4e64h1h1130.0 KiB56.7 KiB
www.googletagmanager.com/gtag/js?id=AW-1046495949&cx=c&gtm=4e64h1h1142.1 KiB51.9 KiB
/static/smithsonianmag/smithsonianmag.bundle.d65b5f619e49.js91.3 KiB51.1 KiB
ads.pubmatic.com/AdServer/js/pwt/156512/6397/pwt.js96.8 KiB46.6 KiB
storage.cloud.kargo.com/ad/network/tag/v3/_rZze57sknyo0IKCwhYtZzBgy.js101.2 KiB41.0 KiB
c.amazon-adsystem.com/aax2/apstag.js90.5 KiB40.2 KiB
/jload?advId=1102&anId=931662&campId=14083&chanId=_eTCBuU...92.1 KiB36.5 KiB
c.amazon-adsystem.com/aax2/apstag.js90.5 KiB35.3 KiB
connect.facebook.net/en_US/fbevents.js96.5 KiB34.1 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js73.1 KiB31.0 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js73.1 KiB31.0 KiB
/pagead/managed/js/activeview/current/ufs_web_display.js73.1 KiB30.3 KiB
/pagead/js/adsbygoogle.js?client=ca-pub-995321313091553854.1 KiB27.2 KiB
static.criteo.net/js/ld/publishertag.js43.2 KiB25.5 KiB
cdn.cxense.com/cx.js37.5 KiB21.8 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
Unattributable5.3 s1.3 s0.0 ms
www.smithsonianmag.com/4.7 s319 ms23 ms
storage.cloud.kargo.com/ad/network/tag/v3/_rZze57sknyo0IKCwhYtZzBgy.js2.9 s1.6 s96 ms
/pagead/managed/js/activeview/current/ufs_web_display.js2.1 s1.9 s105 ms
/scripts/dee4d2d8df6d5ee1e0dd360dd1101e3a6e90b2c86655ba04...2.1 s1.9 s66 ms
a.pub.network/smithsonianmag-com/prebid.js1.7 s1.5 s50 ms
www.smithsonianmag.com/static/smithsonianmag/js/freestar-block.ccab75bb8d68.js1.5 s1.4 s15 ms
/pagead/managed/js/gpt/m202604160201/pubads_impl.js1.4 s1.2 s64 ms
scripts.clarity.ms/0.8.59/clarity.js1.2 s1.0 s10 ms
/pagead/managed/js/adsense/m202604200101/show_ads_impl_fy...979 ms890 ms49 ms
www.googletagmanager.com/gtm.js?id=GTM-T62VWK2850 ms733 ms59 ms
cdn.p-n.io/pushly-sdk.min.js?domain_key=hn5lNDNFJqLiqyK5HrYDmcyK8qRE6OSqKsZr850 ms732 ms25 ms
www.googletagmanager.com/gtag/js?id=G-MLMSZSFHWL&cx=c&gtm=4e64h1h1760 ms670 ms48 ms
c.amazon-adsystem.com/aax2/apstag.js676 ms485 ms146 ms
/ads/12737c15/web.js?&accountId=13be8f66&clickUrl=https%3...631 ms387 ms149 ms
a.omappapi.com/app/js/1.1dbc4ebc.min.js569 ms543 ms0.8 ms
cdn.tinypass.com/api/tinypass.min.js534 ms369 ms43 ms
a.pub.network/smithsonianmag-com/pubfig.engine.mobile.js495 ms348 ms51 ms
www.smithsonianmag.com/cdn-cgi/challenge-platform/scripts/jsd/main.js431 ms396 ms4.1 ms
html-load.cc/script/d3d3LnNtaXRoc29uaWFubWFnLmNvbQ.js398 ms307 ms52 ms
/jsconfig/jload/931662?cbName=__IntegralAS__4352&advId=11...391 ms379 ms1.5 ms
www.smithsonianmag.com/static/ads/freestar.bundle.4bc26fb98137.js362 ms151 ms197 ms
cdn.cookielaw.org/scripttemplates/202407.2.0/otBannerSdk.js361 ms257 ms43 ms
/jload?advId=1102&anId=931662&campId=14083&chanId=_eTCBuU...346 ms239 ms31 ms
/cache/5432/campaigns/1970769-76b3db30e2f4a96785394b57741...321 ms299 ms7.4 ms
/pagead/js/adsbygoogle.js?client=ca-pub-9953213130915538317 ms297 ms16 ms
cdn.cxense.com/cx.js316 ms225 ms21 ms
ads.pubmatic.com/AdServer/js/pwt/156512/6397/pwt.js313 ms278 ms32 ms
/assets/smart-tag/versioned/main-v2_567848e754a175dbe6219...307 ms222 ms64 ms
static.adsafeprotected.com/sca.17.6.4.js300 ms282 ms9.0 ms
www.googletagmanager.com/gtag/destination?id=G-XXXXXXXXXX&cx=c&gtm=4e64h1h1283 ms226 ms41 ms
freestar.solutions.cdn.optable.co/public-assets/freestar-sdk.js237 ms182 ms5.5 ms
/static/smithsonianmag/js/freestar-adshield.1d64932a8bde.js210 ms169 ms2.5 ms
/assets/smart-tag/versioned/cjs_min_92abedfd1b9757a428bfc...210 ms166 ms5.7 ms
/assets/smart-tag/versioned/ads-v2_b6cef0b913934dd3669178...195 ms169 ms24 ms
www.googletagmanager.com/gtag/js?id=AW-1046495949&cx=c&gtm=4e64h1h1192 ms154 ms38 ms
b-code.liadm.com/a-07gi.min.js186 ms163 ms14 ms
connect.facebook.net/en_US/fbevents.js179 ms126 ms31 ms
ep2.adtrafficquality.google/sodar/sodar2.js178 ms161 ms7.1 ms
/signals/config/538226103776412?v=2.9.303&r=stable&domain...172 ms142 ms8.0 ms
www.googletagmanager.com/gtag/js?id=DC-9202818&cx=c&gtm=4e64h1h1167 ms134 ms32 ms
btloader.com/tag?o=5714937848528896&upapi=true164 ms142 ms8.8 ms
metrics.rapidedge.io/gamera.js?ltv=1&audience=1&tpcs=1&partner=freestar147 ms126 ms9.3 ms
a.pub.network/smithsonianmag-com/pubfig.min.js140 ms126 ms11 ms
/static/smithsonianmag/smithsonianmag.bundle.d65b5f619e49.js137 ms92 ms35 ms
cdn.parsely.com/keys/smithsonianmag.com/p.js?gtm_ver=3.2114 ms100 ms5.6 ms
cdn.id5-sync.com/api/1.0/id5-api.js107 ms80 ms14 ms
tags.crwdcntrl.net/lt/c/16576/sync.min.js105 ms88 ms6.4 ms
/signals/config/452270575524133?v=2.9.303&r=stable&domain...103 ms81 ms20 ms
securepubads.g.doubleclick.net/tag/js/gpt.js103 ms90 ms12 ms
assets.bounceexchange.com/assets/bounce/iiq-ortb-6151.js90 ms77 ms13 ms
p.ad.gt/api/v1/p/47482 ms48 ms20 ms
a.omappapi.com/app/js/19.0e932044.min.js81 ms68 ms0.6 ms
config.aps.amazon-adsystem.com/configs/0ab198dd-b265-462a-ae36-74e163ad615980 ms67 ms11 ms
a.omappapi.com/app/js/api.min.js77 ms60 ms3.8 ms
/scripttemplates/otSDKStub.js?did=e9be9ebf-eaa9-42f6-aa54...70 ms22 ms2.7 ms
cdn-ima.33across.com/ima.js66 ms58 ms2.1 ms
secure.cdn.fastclick.net/js/pubcid/latest/pubcid.min.js66 ms59 ms7.1 ms
www.smithsonianmag.com/static/smithsonianmag/smithsonianmag.2f655b1c8e11.css66 ms0.0 ms0.0 ms
/api/creatives/b87154a0/compiled/web.js?v=16-5c751a92&sec...65 ms2.3 ms62 ms
/dd4ba86f-c813-4a11-a5bf-ba1300da69f0/launchpad-liveramp.js61 ms57 ms0.8 ms
a.omappapi.com/app/js/4.5e4ec97b.min.js60 ms53 ms4.8 ms
a.omappapi.com/app/js/5.e5885c40.min.js59 ms44 ms1.3 ms
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...59 ms35 ms3.3 ms
launchpad.privacymanager.io/latest/launchpad.bundle.js57 ms34 ms19 ms
a.omappapi.com/app/js/27.24395f55.min.js54 ms52 ms1.1 ms
a.omappapi.com/app/js/9.a3de2dc4.min.js53 ms47 ms6.0 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation25.9 s
Other7.7 s
Style & Layout2.8 s
Script Parsing & Compilation2.1 s
Garbage Collection627 ms
Rendering530 ms
Parse HTML & CSS311 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
The page has an unload handler in the main frame.Actionable

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 7.9 KiB
URLTransfer SizeEst Savings
www.smithsonianmag.com/static/smithsonianmag/smithsonianmag.2f655b1c8e11.css58.4 KiB7.9 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
/filer_public/04/60/046048bd-5c96-462e-a77f-703f81264e9f/...10.0 MiB
/hVRgdIzr6IEhzR17vYBT4fCVj70=/fit-in/1300x269/filters:no_...274.0 KiB
www.smithsonianmag.com/static/ads/freestar.bundle.4bc26fb98137.js250.2 KiB
a.pub.network/smithsonianmag-com/prebid.js198.0 KiB
/pagead/managed/js/gpt/m202604160201/pubads_impl.js187.7 KiB
/pagead/managed/js/adsense/m202604200101/show_ads_impl_fy...177.5 KiB
www.googletagmanager.com/gtm.js?id=GTM-T62VWK2171.4 KiB
www.googletagmanager.com/gtag/js?id=G-MLMSZSFHWL&cx=c&gtm=4e64h1h1164.0 KiB
/af/dd5f5e/00000000000000007735d944/31/l?primer=f592e0a4b...152.8 KiB
a.pub.network/smithsonianmag-com/pubfig.engine.mobile.js151.6 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
Smithsonian Magazine white logo div#magazine_features > div.current-issue > div.left-column > img#magazineLogo
/static/smithsonianmag/img/smithmag-logo-horizontal-white...
WYOT_ThatsWy_Arc_ForLargeScaleUse-01_PNG_Black.png div > div.special-sponsored > a > img
/1FkuQmDrcZ8TuOIFdny3IXxzv_w=/500x0/filters:no_upscale()/...
form#bx-form-1970769-step-1 > div#bx-group-1970769-qSO4VNC > div#bx-element-1970769-vDKXEGK > img form#bx-form-1970769-step-1 > div#bx-group-1970769-qSO4VNC > div#bx-element-1970769-vDKXEGK > img
/assets/uploads/clients/1682/ads/e0dd2acd3574679864cd7696...
Photographed from a small helicopter over Lake Natron, this image was created u… div#photo_daily > div.potd-grid > a > img.thumbnail

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

●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●User Timing marks and measures 51 user timings
●Avoid long main-thread tasks 20 long tasks found
●Avoid non-composited animations 1 animated element found
●Network Requests
●Network Round Trip Times 180 ms
●Server Backend Latencies 430 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 30 ms
●Avoid large layout shifts 3 layout shifts found
○INP breakdown
84

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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Stephanie Castellano div.article-list-item > div.article-list-text > p.author > a

These are opportunities to improve the legibility of your content.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#smithsonianmag_homecategory_leaderboard > div#google_ads_iframe_/15184186,21714840181/2410_smithsonianmag_homecategory_leaderboard_0__container__ > div > img div#smithsonianmag_homecategory_leaderboard > div#google_ads_iframe_/15184186,21714840181/2410_smithsonianmag_homecategory_leaderboard_0__container__ > div > img
div#smithsonianmag_1x1_bouncex > div#google_ads_iframe_/15184186,21714840181/smithsonianmag_1x1_bouncex_0__container__ > div > img div#smithsonianmag_1x1_bouncex > div#google_ads_iframe_/15184186,21714840181/smithsonianmag_1x1_bouncex_0__container__ > div > img

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.kargo-ad-content > div.celtra-ad-inline-host > div.notranslate > iframe div.kargo-ad-content > div.celtra-ad-inline-host > div.notranslate > iframe

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.kargo-ad-v5 > div.kargo-ad-hover > div.kargo-hover-content > a.kargo-hover-link div.kargo-ad-v5 > div.kargo-ad-hover > div.kargo-hover-content > a.kargo-hover-link
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a
div.home-category-stories > div.article-list-item > div.article-list-image > a div.home-category-stories > div.article-list-item > div.article-list-image > a

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.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Neanderthal Kids Grew Up So Fast—at Least Compared With Their Human Peers—Thank… div.special-article-feature > div.article-list-item > div.article-list-text > h3

These are opportunities to improve keyboard navigation in your application.

○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
●Buttons have an accessible name
●Input buttons have discernible text.
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●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.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
○`[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
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○`<input type="image">` elements have `[alt]` text
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○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.
○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.smithsonianmag.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
www.smithsonianmag.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge
www.smithsonianmag.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
Topics
a.pub.network/smithsonianmag-com/prebid.js line 95, col 1157
AttributionReporting
connect.facebook.net/en_US/fbevents.js line 279, col 769
Unload event listeners are deprecated and will be removed.

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
cdn.cookielaw.org/consent/e9be9ebf-eaa9-42f6-aa54-b9584b1315ac/OtAutoBlock.js
Failed to load resource: the server responded with a status of 404 ()

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLMap URL
www.smithsonianmag.com/static/ads/freestar.bundle.4bc26fb98137.jswww.smithsonianmag.com/static/ads/freestar.bundle.js.map
/static/smithsonianmag/smithsonianmag.bundle.d65b5f619e49.jswww.smithsonianmag.com/static/smithsonianmag/smithsonianmag.bundle.js.map
cdn.cxense.com/cx.cce.jscdn.cxense.com/cx.cce.js.map
launchpad.privacymanager.io/latest/launchpad.bundle.jslaunchpad.privacymanager.io/latest/launchpad.bundle.js.map
html-load.cc/script/d3d3LnNtaXRoc29uaWFubWFnLmNvbQ.jshtml-load.cc/loader.min.js.map
●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
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
○Ensure proper origin isolation with COOP
○Mitigate clickjacking with XFO or CSP
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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.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
cookiepedia.co.uk/giving-consent-to-cookiesMore information

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#smithsonianmag_homecategory_leaderboard > div#google_ads_iframe_/15184186,21714840181/2410_smithsonianmag_homecategory_leaderboard_0__container__ > div > img div#smithsonianmag_homecategory_leaderboard > div#google_ads_iframe_/15184186,21714840181/2410_smithsonianmag_homecategory_leaderboard_0__container__ > div > img
div#smithsonianmag_1x1_bouncex > div#google_ads_iframe_/15184186,21714840181/smithsonianmag_1x1_bouncex_0__container__ > div > img div#smithsonianmag_1x1_bouncex > div#google_ads_iframe_/15184186,21714840181/smithsonianmag_1x1_bouncex_0__container__ > div > img

Format your HTML in a way that enables crawlers to better understand your app’s content.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
body.home > div.kargo-ad-v5 > div.kargo-ad-hover > a.kargo-hover-close
div.kargo-ad-v5 > div.kargo-ad-hover > div.kargo-hover-content > a.kargo-hover-close div.kargo-ad-v5 > div.kargo-ad-hover > div.kargo-hover-content > a.kargo-hover-close

To appear in search results, crawlers need access to your app.

○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
●robots.txt is valid
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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