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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.

76

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
bordeaux.futurecdn.net/bordeaux.js0.0 ms159.1 KiB
cdn.privacy-mgmt.com/Notice.8f529.js3600.0 s91.2 KiB
sdk.mrf.io/statics/marfeel-sdk.js?id=78421800.0 s64.7 KiB
cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js3600.0 s42.0 KiB
freyr.futurecdn.net/freyr.js0.0 ms22.3 KiB
sdk.mrf.io/statics/47bd3e88b6bda15c34ce.js3600.0 s24.4 KiB
champagne.futurecdn.net/champagne.js0.0 ms16.5 KiB
cdn.viafoura.net/entry/index.js600.0 s15.6 KiB
cdn.privacy-mgmt.com/Notice.30929.css3600.0 s6.7 KiB
cdn.mos.cms.futurecdn.net/flexiimages/ivdpgonlnu1765899656.svg0.0 ms3.9 KiB
sdk.mrf.io/statics/compass-multimedia-sdk.js?version=22603600.0 s4.3 KiB
cdn.mos.cms.futurecdn.net/flexiimages/lkl5g4scbi1765899580.svg0.0 ms3.4 KiB
cdn.mos.cms.futurecdn.net/flexiimages/dq9uu49vac1765206893.svg0.0 ms3.1 KiB
uk-script.dotmetrics.net/Scripts/ncs-script.js?v=3620.0 ms2.9 KiB
sb.scorecardresearch.com/internal-cs/default/beacon.js86400.0 s6.7 KiB
cdn.mos.cms.futurecdn.net/flexiimages/6gtg42flht1767779175.svg0.0 ms2.5 KiB
cdn.mos.cms.futurecdn.net/flexiimages/dyp0vja1zt1765206742.svg0.0 ms2.5 KiB
cdn.mos.cms.futurecdn.net/flexiimages/kd4wux0r8f1767779188.svg0.0 ms2.4 KiB
cdn.mos.cms.futurecdn.net/flexiimages/ivbbltuzps1765899740.svg0.0 ms1.9 KiB
cdn.privacy-mgmt.com/polyfills.01516.js3600.0 s2.3 KiB
cdn.mos.cms.futurecdn.net/flexiimages/pddr9vgbzk1765206727.svg0.0 ms1.6 KiB
cdn.mos.cms.futurecdn.net/flexiimages/l4luqkbsae1765899775.svg0.0 ms1.1 KiB
/hit.gif?id=5208&url=https%3A%2F%2Fwww.livescience.com%2F...86400.0 s1.2 KiB
ad-delivery.net/px.gif?ch=286400.0 s611 B
ad-delivery.net/px.gif?ch=186400.0 s109 B

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:0.20482899999999998] map[node:map[boundingRect:map[bottom:0 height:0 left:0 right:0 top:0 width:0] lhId:page-2-META nodeLabel:head > meta path:1,HTML,0,HEAD,2,META selector:head > meta snippet:<meta name="viewport" content="width=device-width,initial-scale=1"> type:node] score:0.203667] map[node:map[boundingRect:map[bottom:104 height:44 left:1001 right:1088 top:60 width:87] lhId:page-1-LI nodeLabel:More path:1,HTML,1,BODY,7,NAV,3,DIV,0,DIV,0,UL,8,LI selector:div.wrapper > div.menuitems > ul.nav-list > li.menu-item snippet:<li class="menu-item menu-item-more menu-level-1 has-submenu menu-item-hover-reveal p…" style="visibility: visible;"> type:node] score:0.001162]]

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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:113.802 source:map[type:text value:[unattributed]]]]

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 satellite photo showing a group of islands in the Pacific Ocean with a glowin…
path: 1,HTML,1,BODY,10,DIV,4,DIV,0,DIV,1,DIV,1,DIV,0,SECTION,0,DIV,0,A,0,FIGURE,0,DIV,0,DIV,0,PICTURE,1,IMG
selector: div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
snippet: <img src="https://cdn.mos.cms.futurecdn.net/WntAEWYUaXJwBEAXaa9JnN-650-80.jpg.webp" alt="A satellite photo showing a group of islands in the Pacific Ocean with a g…" srcset="https://cdn.mos.cms.futurecdn.net/WntAEWYUaXJwBEAXaa9JnN-320-80.jpg 320w, …" sizes="(min-width: 1000px) 600px, (min-width: 700px) calc(100vw - 48px), 100vw" data-original-mos="https://cdn.mos.cms.futurecdn.net/WntAEWYUaXJwBEAXaa9JnN.jpg" data-pin-media="https://cdn.mos.cms.futurecdn.net/WntAEWYUaXJwBEAXaa9JnN.jpg" data-pin-nopin="true">

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

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.

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 series of flat red plateaus with a blue river cutting between them, creating … div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
cdn.mos.cms.futurecdn.net/F2wEugVw4ZEjwHXzVqgoRF-840-80.jpg.webp88.3 KiB80.2 KiB
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
cdn.mos.cms.futurecdn.net/Ff5QYzuLKhhc7iPKuReCrP-840-80.jpg.webp67.8 KiB59.7 KiB
Two images side by side, the one on the left is an illustration of blue and ora… div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
cdn.mos.cms.futurecdn.net/7usLS9NEtwQKFienEciP9J-840-80.jpg.webp57.5 KiB50.3 KiB
A large white bear walks on its four paws across a green and brown tundra lands… div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
cdn.mos.cms.futurecdn.net/BgHESbK5CdzYz2c5An4PGk-840-80.jpg.webp45.8 KiB40.0 KiB
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
cdn.mos.cms.futurecdn.net/g84fMXGW22yxEFvi3CFbfa-840-80.jpg.webp37.1 KiB32.5 KiB
Satellite photo showing a lake bisecting the snowy edge of a gray ridged glacier div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
cdn.mos.cms.futurecdn.net/wqqB6RqDeezRgNRLz7jfdD-840-80.jpg.webp33.4 KiB29.3 KiB
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
cdn.mos.cms.futurecdn.net/nERaRfLTGSn5qrXMmV3mTi-840-80.jpg.webp33.0 KiB28.8 KiB
Photograph of Lindisfarne Castle at night with the band of the Milky Way on the… div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
cdn.mos.cms.futurecdn.net/m3hN2hwAjdhWwuwqLGiTWb-840-80.jpg.webp27.2 KiB23.8 KiB
A blue and white map against a dark background. The denser areas indicate regio… div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
cdn.mos.cms.futurecdn.net/BcLRrTufB7CCq8C5a6Sqea-320-80.jpg.webp29.6 KiB20.2 KiB
Two large dark holes are seen close together against a red glowing cosmic backg… div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
cdn.mos.cms.futurecdn.net/GwVdCy2wAw22nJtYL37UwR-840-80.jpg.webp23.0 KiB20.1 KiB
Photo of a stream of orange fire coming from the Artemis I rocket as it launche… div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
cdn.mos.cms.futurecdn.net/3rniEYk7aYqt2UJxxDRqBB-840-80.jpg.webp20.6 KiB18.0 KiB

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.

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: 240 ms
URLTime Spent
livescience.com/240 ms
www.livescience.com/0.0 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 > meta head > meta
0.204
More div.wrapper > div.menuitems > ul.nav-list > li.menu-item
0.001

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 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.

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 Evaluation1.1 s
Other578 ms
Style & Layout255 ms
Script Parsing & Compilation141 ms
Garbage Collection59 ms
Rendering56 ms
Parse HTML & CSS56 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
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not actionable

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

Max Potential First Input Delay 110 ms
Optimize DOM size
LCP breakdown
Modern HTTP
Optimize viewport for mobile
Minify CSS
Minify JavaScript
Reduce unused CSS
User Timing marks and measures 29 user timings
JavaScript execution time 0.9 s
Avoid long main-thread tasks 4 long tasks found
Image elements have explicit `width` and `height`
Network Requests
Network Round Trip Times 100 ms
Server Backend Latencies 130 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 0 ms
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.

ARIA

Some ARIA roles have required attributes that describe the state of the element to screen readers. Learn more about roles and required attributes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
LATEST ARTICLES div#slice-container-popularBox > section.popular-box > div.popular-box__label > div.popular-box__label__tab

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.

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
Space ul.nav-list > li.menu-item > a > span
Health ul.nav-list > li.menu-item > a > span
Planet Earth ul.nav-list > li.menu-item > a > span
Animals ul.nav-list > li.menu-item > a > span
Archaeology ul.nav-list > li.menu-item > a > span
Physics & Math ul.nav-list > li.menu-item > a > span
Technology ul.nav-list > li.menu-item > a > span
More div.wrapper > div.menuitems > ul.nav-list > li.menu-item
TRENDING div#slice-container-trendingbar > div.trending__wrapper > nav.trending__nav > span#trending-items
SCIENCE NEWS THIS WEEK article.search-result > div.content > p.synopsis > span.free-text-label
EARTH FROM SPACE article.search-result > div.content > p.synopsis > span.free-text-label
INTERVIEW article.search-result > div.content > p.synopsis > span.free-text-label
INTERVIEW article.search-result > div.content > p.synopsis > span.free-text-label
SCIENCE CROSSWORD article.search-result > div.content > p.synopsis > span.free-text-label
QUIZ article.search-result > div.content > p.synopsis > span.free-text-label
BUYING GUIDE article.search-result > div.content > p.synopsis > span.free-text-label
BUYING GUIDE article.search-result > div.content > p.synopsis > span.free-text-label
BUYING GUIDES article.search-result > div.content > p.synopsis > span.free-text-label

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.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img

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.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
NASA shuts off another Voyager 1 instrument ahead of risky 'Big Bang' maneuver … div.wdn-fte-rcr > div.list-text-links > div.listingResult > a.article-link
Florida is facing its most intense drought in 15 years. Here's how it got so ba… div.wdn-fte-rcr > div.list-text-links > div.listingResult > a.article-link
Neanderthal toddlers grew faster than modern humans, probably because of the ha… div.wdn-fte-rcr > div.list-text-links > div.listingResult > a.article-link
'Nations need to prepare now': Key Atlantic ocean current is much closer to col… div.wdn-fte-rcr > div.list-text-links > div.listingResult > a.article-link
Glowing ring of plankton surrounding New Zealand islands linked to deadly under… div.mainCarousel > section#homePageCarousel > div#Item1 > a.article-link
Largest-ever 3D map of the universe shows 47 million galaxies, from the Milky W… div.mainCarousel > section#homePageCarousel > div#Item3 > a.article-link
Scientists identify main cause of extreme nausea and vomiting in pregnancy 2 Co… div.mainCarousel > section#homePageCarousel > div#Item4 > a.article-link
A giant 'shadow' has been creeping across Mars for 50 years — and scientists ar… div.mainCarousel > section#homePageCarousel > div#Item5 > a.article-link
'The chances of you living 50 years are very small': Theoretical physicist expl… div.mainCarousel > section#homePageCarousel > div#Item6 > a.article-link
Altar to Sol: A rare 1,900-year-old monument dedicated to the Roman god of ligh… div.mainCarousel > section#homePageCarousel > div#Item7 > a.article-link
Can the US be trusted with the moon? A law scholar raises concerns after Artemi… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Physicists witness faster-than-light darkness pinpricks, humans found to still … section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
2 supermassive black holes may collide 100 years from now ‪—‬ and Earth would f… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Bright-green fireball meteor caught exploding above famous Viking raid site in … section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Northern lights may be visible from several US states Friday and Saturday as gi… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Some polar bears are adapting to their melting habitat. Will it be enough to sa… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Colorado River may have pooled and spilled over to form the Grand Canyon, solvi… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Ancient process that created rare earth elements discovered — and it could help… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Mini lake meets snowy rim of Canada's oldest ice mass By Harry Baker published… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
'I've seen the movies. What a horrible way to die': What it's like to be sucked… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
700-year-old mummy from Bolivia contains earliest confirmed evidence of strep t… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Did King Arthur really exist? By Owen Jarus published April 18, 2026 The stor… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Archaeologists discover perfectly circular ancient Egyptian temple that may hav… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
15 old shoes found in archaeological excavations around the world, including at… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Anglo-Saxon burial holds an older sister cradling her little brother after they… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Bruce the parrot is missing his upper beak —‬ but that hasn't stopped him from … section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Naked mole rats wage bloody wars of succession to choose a new queen — but one … section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Can chickens really run around with their heads cut off? By Ashley P. Taylor p… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
New study confirms lobsters feel pain, driving scientists to call for a ban on … section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Strange mammal ancestor laid huge, leathery eggs —‬ and it was key to surviving… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Triassic croc relative from Ghost Ranch, New Mexico finally identified after ne… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Loneliness may contribute to memory issues, but not dementia — they are 'not th… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
$3 million prize goes to duo whose research led to first sickle cell CRISPR the… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
New pain-relief opioid could be much less addictive than morphine, rodent study… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Experimental drug doubles one-year survival in pancreatic cancer By RJ Mackenz… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Science history: Doctor autopsies the brain of a man who couldn't speak — and r… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Diagnostic dilemma: A woman heard voices telling her she had a brain tumor ‪—‬ … section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Hackers used AI to steal hundreds of millions of Mexican government and private… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
This humanoid robot does all your housework for you ‪—‬ and its makers say it's… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
AI for breakup texts? How 'sycophantic' chatbots are messing with our ability t… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Physicists witness pinpricks of darkness moving faster than the speed of light … section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Physicists entangle two moving atoms for the first time, validating 'spooky' qu… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
'They are literally everywhere': The shocking story of how forever chemicals po… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Live Science crossword puzzle #40: Closest planet to the sun — 11 across By Ha… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Artemis II quiz: Is your knowledge of NASA's historic moon mission out of this … section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Octopus quiz: Are you a sucker for cephalopod science? By Kenna Hughes-Castleb… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Best budget fitness trackers 2026: Cheap but mighty By Maddy Biddulph, Anna Go… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Best fitness trackers 2026: From smart rings to multisport GPS watches By Andr… section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
Best sports earbuds 2026: For runners, swimmers and other fitness enthusiasts … section.listingResultsWrapper > div.listingResults > div.listingResult > a.article-link
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]` 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.
`button`, `link`, and `menuitem` elements have accessible names
ARIA attributes are used as specified for the element's role
Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
`[aria-hidden="true"]` elements do not contain focusable descendents
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.
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
Skip links are focusable.
Document has a main landmark.
Deprecated ARIA roles were not used
Uses ARIA roles only on compatible elements
Image elements do not have `[alt]` attributes that are redundant text.
Identical links have the same purpose.
`[accesskey]` values are unique
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
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.
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.
81

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
Unload event listeners are deprecated and will be removed.
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 browser errors logged to the console
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 DOM-based XSS with Trusted Types
Detected JavaScript libraries
Page has valid source maps
Redirects HTTP traffic to HTTPS
Mitigate clickjacking with XFO or CSP
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

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.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img
div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img div.image-remove-flow-width-setter > div.image-remove-reflow-container > picture > img

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 have descriptive text
Links are crawlable
robots.txt is valid
Document has a valid `hreflang`
Document has a valid `rel=canonical`

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