Skip to content
https://popsci.com

Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
SCORE
0
GRADE
FIX
0
REVIEW
0
PASS
0
INFO
0

Detailed Report

Audit breakdown by category with detailed findings.

12

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.

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.69485] map[node:map[boundingRect:map[bottom:0 height:0 left:0 right:0 top:0 width:0] lhId:page-6-LINK nodeLabel:head > link path:1,HTML,0,HEAD,8,LINK selector:head > link snippet:<link rel="preconnect" href="//fonts.gstatic.com"> type:node] score:0.691981] map[node:map[boundingRect:map[bottom:401 height:64 left:16 right:396 top:337 width:380] lhId:page-4-A nodeLabel:Curiosity rover finds signs of ancient life on Mars path:1,HTML,1,BODY,3,DIV,1,MAIN,0,DIV,0,DIV,1,HEADER,0,DIV,1,DIV,0,DIV,2,H2,0,A selector:div.featured-post > div > h2.hero-featured-title-block > a.hover-link snippet:<a href="https://www.popsci.com/science/curiosity-rover-life-mars/" class="hover-link tracking-homepage-hero"> type:node] score:0.002869 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/barlowcondensed/v13/HTx3L3I-JCGChYJ8VI-L6OO_au7B6xHT2lv0tKk.woff2]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B4873z3bWuYMBYro.woff2]] map[cause:Web font extra:map[type:url value:https://fonts.gstatic.com/s/barlowcondensed/v13/HTxwL3I-JCGChYJ8VI-L6OO_au7B46r2z3bWuYMBYro.woff2]]] type:subitems]]]

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.

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 parrot with green feathers and a missing top beak a.card-post-image-link > div.relative > div.relative > img.archive-post-thumb
www.popsci.com/wp-content/uploads/2026/04/bruce-parrot-lead.png?w=768&h=432482.0 KiB441.5 KiB
Lagunitas Teams Up with Pinter to Bring Iconic Beers to Home Brewers’ Hands div > a > div.relative > img.archive-post-thumb
www.popsci.com/wp-content/uploads/2026/04/PINTER__Home_Brewers.jpg?w=533&h=40435.0 KiB8.6 KiB
REI bags on sale header div > a > div.relative > img.archive-post-thumb
www.popsci.com/wp-content/uploads/2026/04/rei-bag-sale-header.jpg?w=580&h=34835.5 KiB4.4 KiB

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
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
experiments.parsely.com/vip-experiments.js?apiKey=popsci.com&ver=3.23.18.9 KiB799 ms
/_static/??-eJx9zEEKgCAQheELZVMESYvoLFKDjehUOhLdPoMWrYIH/...35.0 KiB302 ms
/wp-content/plugins/sailthru-widget/js/widget.subscribe.m...822 B
/_static/??/wp-content/client-mu-plugins/recurrent/dist/c...52.6 KiB754 ms
/wp-content/plugins/nelio-ab-testing/assets/dist/js/visit...924 B151 ms
/_static/??/wp-content/plugins/sailthru-widget/css/widget...1.4 KiB

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
cdn.privacy-mgmt.com/Notice.8f529.js3600.0 s91.3 KiB
c.amazon-adsystem.com/aax2/apstag.js3600.0 s91.0 KiB
/eyewise-id-module/eyewise-module-consent.js?token=dGVzdH...0.0 ms64.2 KiB
btloader.com/tag?o=5150306120761344&upapi=true300.0 s50.1 KiB
cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js3600.0 s42.0 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
experiments.parsely.com/vip-experiments.js?apiKey=popsci.com&ver=3.23.130.0 s8.9 KiB
/ca935c17-544f-477e-88cb-4288124e4d61/launchpad-liveramp.js0.0 ms8.8 KiB
/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/...14400.0 s11.4 KiB
client-ml.intergient.com/v2/websites/75188/model/script.js3600.0 s6.8 KiB
cdn.privacy-mgmt.com/Notice.30929.css3600.0 s6.7 KiB
tags.crwdcntrl.net/lt/c/17138/sync.min.js86400.0 s13.1 KiB
script-api.ccgateway.net/script/bundle?id=www.popsci.com&parentId=5bb3e208591200.0 s4.7 KiB
tag.wknd.ai/7822/i.js60.0 s3.5 KiB
config.aps.amazon-adsystem.com/configs/bd056b42-51db-43ce-9a8e-3b11319b5d1f3600.0 s3.9 KiB
assets.bounceexchange.com/cache/7822/website-24620e3c8993cf96b4a59d40e8dfe04e.js120.0 s2.1 KiB
cdn.privacy-mgmt.com/polyfills.01516.js3600.0 s2.3 KiB
/pixel/bounce/?pid=m51mh00&t=ajs&uid=user_a92ba101-d2fd-4...0.0 ms1.1 KiB
cdn.intergient.com/pf?country=BR&browser=Chrome&device=mobile&website_id=751880.0 ms1.1 KiB
config.playwire.com/1025364/v2/websites/75188/styles.css86400.0 s2.3 KiB
raw.githubusercontent.com/easylist/easylist/master/docs/1x1.gif300.0 s585 B
/v1.0/parent/5bb3e20859/engagement/trigger/user_sync?src=...0.0 ms155 B
/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/...14400.0 s0 B

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

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: 1.1 s
URLTime Spent
popsci.com/1.1 s
www.popsci.com/0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 730 ms
URLTime Spent
www.popsci.com/830 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
head > link head > link
0.692
Curiosity rover finds signs of ancient life on Mars div.featured-post > div > h2.hero-featured-title-block > a.hover-link
0.003

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.

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: 300 ms 48.9 KiB
URLTransfer SizeEst Savings
/_static/??/wp-content/client-mu-plugins/recurrent/dist/c...52.4 KiB48.9 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: 150 ms 908.3 KiB
URLTransfer SizeEst Savings
cdn.intergient.com/prebid/prebid.05eaa3284c60ad6e334d.js221.8 KiB136.4 KiB
/pagead/managed/js/gpt/m202604160201/pubads_impl.js187.7 KiB130.2 KiB
imasdk.googleapis.com/js/sdkloader/ima3.js146.4 KiB110.2 KiB
cdn.intergient.com/pageos/V.20260416.1/main.121b53b8564b55f13382.js171.4 KiB92.5 KiB
/assets/smart-tag/versioned/main-v2_567848e754a175dbe6219...116.2 KiB86.2 KiB
www.googletagmanager.com/gtag/js?id=G-P9C278278B&cx=c&gtm=4e64h1170.1 KiB65.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-MKVW68D156.2 KiB60.4 KiB
www.googletagmanager.com/gtm.js?id=GTM-56LB8GM&gtm=4e64h1131.6 KiB58.2 KiB
c.amazon-adsystem.com/aax2/apstag.js90.6 KiB49.3 KiB
/eyewise-id-module/eyewise-module-consent.js?token=dGVzdH...63.9 KiB41.6 KiB
/assets/smart-tag/versioned/ads-v2_b6cef0b913934dd3669178...41.7 KiB33.6 KiB
/_static/??-eJx9zEEKgCAQheELZVMESYvoLFKDjehUOhLdPoMWrYIH/...34.8 KiB23.0 KiB
cdn.privacy-mgmt.com/unified/4.40.1/usnat.f12613136193900e32e2.bundle.js41.7 KiB21.2 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
www.popsci.com/1.4 s503 ms10 ms
Unattributable1.4 s359 ms0.0 ms
cdn.intergient.com/pageos/V.20260416.1/main.121b53b8564b55f13382.js984 ms861 ms68 ms
cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js620 ms552 ms18 ms
www.googletagmanager.com/gtm.js?id=GTM-MKVW68D536 ms405 ms119 ms
www.googletagmanager.com/gtag/js?id=G-P9C278278B&cx=c&gtm=4e64h1493 ms426 ms62 ms
cdn.intergient.com/prebid/prebid.05eaa3284c60ad6e334d.js341 ms218 ms94 ms
c.amazon-adsystem.com/aax2/apstag.js273 ms215 ms47 ms
btloader.com/tag?o=5150306120761344&upapi=true&ver=0.1248 ms214 ms25 ms
/pagead/managed/js/gpt/m202604160201/pubads_impl.js242 ms161 ms76 ms
/assets/smart-tag/versioned/main-v2_567848e754a175dbe6219...224 ms155 ms65 ms
cdn.privacy-mgmt.com/unified/4.40.1/usnat.f12613136193900e32e2.bundle.js180 ms130 ms50 ms
/ca935c17-544f-477e-88cb-4288124e4d61/launchpad-liveramp.js138 ms128 ms8.4 ms
imasdk.googleapis.com/js/sdkloader/ima3.js137 ms75 ms61 ms
securepubads.g.doubleclick.net/tag/js/gpt.js133 ms98 ms34 ms
/assets/smart-tag/versioned/ads-v2_b6cef0b913934dd3669178...124 ms100 ms21 ms
www.googletagmanager.com/gtm.js?id=GTM-56LB8GM&gtm=4e64h1112 ms61 ms50 ms
www.popsci.com/wp-content/themes/recurrent-base/js/app.js?ver=177679097398 ms70 ms9.0 ms
cdn.intergient.com/pageos/V.20260416.1/videoCard.cea8a6bd8cad3ad73428.js87 ms86 ms0.6 ms
/eyewise-id-module/eyewise-module-consent.js?token=dGVzdH...85 ms60 ms24 ms
config.aps.amazon-adsystem.com/configs/bd056b42-51db-43ce-9a8e-3b11319b5d1f82 ms68 ms12 ms
/_static/??-eJx9zEEKgCAQheELZVMESYvoLFKDjehUOhLdPoMWrYIH/...81 ms58 ms14 ms
cdn.privacy-mgmt.com/unified/4.40.1/gdpr-tcf.27718c8cb9d29947d2c1.bundle.js71 ms50 ms21 ms
tags.crwdcntrl.net/lt/c/17138/sync.min.js62 ms52 ms5.7 ms
/wp-content/client-mu-plugins/recurrent/dist/js/frontend....61 ms42 ms7.4 ms
launchpad.privacymanager.io/latest/launchpad.bundle.js59 ms27 ms31 ms
/wp-content/client-mu-plugins/recurrent/dist/js/youtube-l...53 ms49 ms2.8 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 Evaluation5.4 s
Other1.2 s
Script Parsing & Compilation999 ms
Style & Layout666 ms
Garbage Collection147 ms
Parse HTML & CSS108 ms
Rendering86 ms

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: 0.0 ms 14.2 KiB
URLTransfer SizeEst Savings
launchpad.privacymanager.io/latest/launchpad.bundle.js45.0 KiB14.2 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
www.popsci.com/wp-content/uploads/2026/04/bruce-parrot-lead.png?w=768&h=432482.8 KiB
cdn.intergient.com/prebid/prebid.05eaa3284c60ad6e334d.js222.1 KiB
/pagead/managed/js/gpt/m202604160201/pubads_impl.js187.7 KiB
cdn.intergient.com/pageos/V.20260416.1/main.121b53b8564b55f13382.js171.7 KiB
www.googletagmanager.com/gtag/js?id=G-P9C278278B&cx=c&gtm=4e64h1170.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-MKVW68D156.5 KiB
imasdk.googleapis.com/js/sdkloader/ima3.js146.9 KiB
www.googletagmanager.com/gtm.js?id=GTM-56LB8GM&gtm=4e64h1131.6 KiB
/assets/smart-tag/versioned/main-v2_567848e754a175dbe6219...116.4 KiB
cdn.privacy-mgmt.com/Notice.8f529.js91.3 KiB

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

●Optimize DOM size
●Font display
●Forced reflow
●LCP breakdown
●LCP request discovery
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●User Timing marks and measures 15 user timings
●Avoid long main-thread tasks 20 long tasks found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 210 ms
●Server Backend Latencies 370 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
○INP breakdown
○Avoid non-composited animations
88

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
SEE MORE div.homepage-hero-3-col-layout > div.latest-news-list > div.latest-news-list-cta-wrapper > a.latest-news-list-cta
SEE IT ul > li.recurrent-homepage-commerce-item > div > a.commerce-item-button
SEE IT ul > li.recurrent-homepage-commerce-item > div > a.commerce-item-button
SEE IT ul > li.recurrent-homepage-commerce-item > div > a.commerce-item-button
SEE IT ul > li.recurrent-homepage-commerce-item > div > a.commerce-item-button
SIGN UP section.recurrent-newsletter-block > div.container > div.newsletter-content > a.newsletter-direct-link
BROWSE ALL COVERS div.page-content > div.entry-content > section.recurrent-cover-art-block > a.cover-art-cta
SIGN UP div.newsletter-signup-form-wrapper > form > div.flex > button.footer-newsletter-cta

These are opportunities to improve the legibility of your content.

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
People keep trespassing near cave filled with bats infected by Ebola’s cousin div.card-post > div.post-content > a.card-post-title-link > h3.card-post-title

These are opportunities to improve keyboard navigation in your application.

Names and labels

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.entry-content > section.recurrent-cover-art-block > div.cover-art-frames-grid > a div.entry-content > section.recurrent-cover-art-block > div.cover-art-frames-grid > a
div.entry-content > section.recurrent-cover-art-block > div.cover-art-frames-grid > a div.entry-content > section.recurrent-cover-art-block > div.cover-art-frames-grid > a
div.entry-content > section.recurrent-cover-art-block > div.cover-art-frames-grid > a div.entry-content > section.recurrent-cover-art-block > div.cover-art-frames-grid > a
div.entry-content > section.recurrent-cover-art-block > div.cover-art-frames-grid > a div.entry-content > section.recurrent-cover-art-block > div.cover-art-frames-grid > a
ul.grid > li.author-expert > div.flex > a.w-2/6 ul.grid > li.author-expert > div.flex > a.w-2/6
ul.grid > li.author-expert > div.flex > a.w-2/6 ul.grid > li.author-expert > div.flex > a.w-2/6
ul.grid > li.author-expert > div.flex > a.w-2/6 ul.grid > li.author-expert > div.flex > a.w-2/6
ul.grid > li.author-expert > div.flex > a.w-2/6 ul.grid > li.author-expert > div.flex > a.w-2/6
ul.grid > li.author-expert > div.flex > a.w-2/6 ul.grid > li.author-expert > div.flex > a.w-2/6
ul.grid > li.author-expert > div.flex > a.w-2/6 ul.grid > li.author-expert > div.flex > a.w-2/6
div.footer-columns-wrapper > div.footer-main-col > div.footer-logo-wrapper > a div.footer-columns-wrapper > div.footer-main-col > div.footer-logo-wrapper > 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.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
TV CHANNEL div.footer-content-col > ul#footer-line-2 > li#menu-item-709040 > a
PRIVACY POLICY div.footer-content-col > ul#footer-line-2 > li#menu-item-709044 > a
TERMS & CONDITIONS div.footer-content-col > ul#footer-line-2 > li#menu-item-709046 > a
AFFILIATE DISCLOSURE div.footer-content-col > ul#footer-line-2 > li#menu-item-709038 > a
SITEMAP div.footer-content-col > ul#footer-line-2 > li#menu-item-709047 > a
DEPOSIT PHOTOS div.footer-content-col > ul#footer-line-2 > li#menu-item-709048 > a

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
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●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
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●Elements use only permitted ARIA attributes
●Document has a `<title>` element
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●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
●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
○`[aria-hidden="true"]` elements do not contain focusable descendents
○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 buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○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.
96

Best Practices

General

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.popsci.com/
Attestation check for Protected Audience on https://rtb.openx.net failed.
api.rlcdn.com/api/identity/envelope?pid=13250
Failed to load resource: the server responded with a status of 451 ()
cdn.intergient.com/pageos/V.20260416.1/runtime.a0196c83a5d19546c235.js
Uncaught (in promise) ChunkLoadError: Loading chunk 474 failed. (error: https://cdn.intergient.com/pageos/V.20260416.1/474.54ec3c969d5dcf548468.js)
●Uses HTTPS
●Avoids deprecated APIs
●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
92

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
www.popsci.com/tag/news/SEE MORE

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

○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 are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

Send Feedback