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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.

40

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
d1nruqhae353qc.cloudfront.net/primesignup/widget.js0.0 ms62.8 KiB
/images/G/01/payments-portal/r1/loading-4x._CB338200758_.gif3600.0 s15.8 KiB
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms150 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:143-6507906-6253540:28ERRK1NA...0.0 ms148 B
/rd/uedata?rid=28ERRK1NAAG1AYDDV1A0&sid=143-6507906-62535...0.0 ms71 B
/rd/uedata?rid=28ERRK1NAAG1AYDDV1A0&sid=143-6507906-62535...0.0 ms71 B

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
m.media-amazon.com/images/S/sash/pnZF3$c0rgepEUt.woff2135 ms
m.media-amazon.com/images/S/sash/-w6hwcDxlefrOYI.woff2135 ms
m.media-amazon.com/images/S/sash/lZemoC3awOEEzLR.woff2130 ms
m.media-amazon.com/images/S/sash/NvWNxKhmDbgI1lq.woff2130 ms
m.media-amazon.com/images/S/sash/1Ep1kWVX5g73xrY.woff2130 ms
m.media-amazon.com/images/S/sash/gyrV-mLs7VcgiFC.woff2130 ms
m.media-amazon.com/images/S/sash/8AuIu4whVB5EMoJ.woff2130 ms
m.media-amazon.com/images/S/sash/MexTn601PAhMvAn.woff2130 ms
m.media-amazon.com/images/S/sash/rlTCFdyUZFR9mQI.woff2130 ms
m.media-amazon.com/images/S/sash/ukoYNzKrqDRxhTq.woff2130 ms
m.media-amazon.com/images/S/sash/1yLvxs7jafx7AW$.woff2125 ms
m.media-amazon.com/images/S/sash/ozb5-CLHQWI6Soc.woff290 ms
m.media-amazon.com/images/S/sash/KwhNPG8Jz-Vz2X7.woff255 ms
m.media-amazon.com/images/S/sash/2SazJx$EeTHfhMN.woff250 ms
m.media-amazon.com/images/S/sash/YixBCot3QJnxh4p.woff230 ms
m.media-amazon.com/images/S/sash/Dv1WQ5DdeMS5qP7.woff225 ms
m.media-amazon.com/images/S/sash/VjTR4RqBzY0mUYx.woff225 ms
m.media-amazon.com/images/S/sash/WOnTLzkiaEccV7F.woff225 ms
m.media-amazon.com/images/S/sash/pDxWAF1pBB0dzGB.woff220 ms
m.media-amazon.com/images/S/sash/Wdqa3S7nfGc3Naj.woff210 ms
m.media-amazon.com/images/S/sash/KFPk-9IF4FqAqY-.woff25.0 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:24.322 source:map[column:199 line:102 type:source-location url:https://www.amazon.com/ 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:30.984 source:map[column:40 line:6 type:source-location url:https://m.media-amazon.com/images/I/21NZdO3uFtL.js?AUIClients/GWMMetricsJS urlProvider:network]] map[reflowTime:1.161 source:map[column:90 line:35 type:source-location url:https://m.media-amazon.com/images/I/516npEhK50L.js?AUIClients/CardJsRuntimeBuzzCopyBuild urlProvider:network]] map[reflowTime:9.324 source:map[column:241 line:190 type:source-location url:https://m.media-amazon.com/images/I/61xJcNKKLXL.js?AUIClients/AmazonUIjQuery urlProvider:network]] map[reflowTime:1.466 source:map[column:19706 line:1604 type:source-location url:https://www.amazon.com/ urlProvider:network]] map[reflowTime:12.725 source:map[column:2 line:157 type:source-location url:https://m.media-amazon.com/images/I/61xJcNKKLXL.js?AUIClients/AmazonUIjQuery urlProvider:network]] map[reflowTime:22.253 source:map[column:2 line:155 type:source-location url:https://m.media-amazon.com/images/I/61xJcNKKLXL.js?AUIClients/AmazonUIjQuery urlProvider:network]] map[reflowTime:0.353 source:map[type:text value:[unattributed]]]]

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
m.media-amazon.com/images/I/11wZer7figL.css?AUIClients/WebFlowIngressJs1.1 KiB
/images/I/11i1DYEiaoL._RC|01GaLSH4siL.css,51fMLkDdAPL.css...37.2 KiB454 ms
/images/I/51u-XQ7CSuL._RC|41iP6O--n8L.css,01FcI3FsaiL.css...13.5 KiB
/images/I/41MC9trl2dL.css?AUIClients/GWMWebAssets6.8 KiB
/images/I/51AuMXFXGYL._RC|51waPb-h-9L.css,51IpuNHA9ZL.css...14.8 KiB
/images/I/015334cfZML.css?AUIClients/AmazonEmberModernFon...1.1 KiB
/images/I/01IDWj2B3GL.css?AUIClients/AmazonHomepageWindow...1.1 KiB
/images/I/01+72+wCC9L.css?AUIClients/GlowToasterAssets1.1 KiB151 ms
/images/I/41Q63wvCUzL.css?AUIClients/InternationalCustome...4.3 KiB
/images/I/21mTcdsdtAL._RC|51z4zCuj7VL.css_.css?AUIClients...8.7 KiB767 ms
/images/I/21NZdO3uFtL.js?AUIClients/GWMMetricsJS3.3 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
div.icp-container-mobile > div#icp-touch-link-language > a.icp-language-link > div.icp-nav-globe-img-2 div.icp-container-mobile > div#icp-touch-link-language > a.icp-language-link > div.icp-nav-globe-img-2
m.media-amazon.com/images/S/sash/MAbi1rCjQI9H2y0.png44.3 KiB35.0 KiB
Cra-Z-Art 16ct Washable Jumbo Crayons, Easy Clean Up, Back To School Supply, Cr… div.a-section > a.a-spacing-none > div.a-section > img._npack-asin-card_style_asin-image__2BYur
m.media-amazon.com/images/I/81IA1KEVE3L._AC_SX290_.jpg32.2 KiB28.0 KiB
Sharpie Tank Yellow Highlighters Marker Set, Study Essentials, Chisel Tip, Idea… div.a-section > a.a-spacing-none > div.a-section > img._npack-asin-card_style_asin-image__2BYur
m.media-amazon.com/images/I/71DmFqcS8lL._AC_SX290_.jpg31.0 KiB28.0 KiB
Sharpie Gel Highlighters, Assorted Colors, Smear-Resistant, Bullet Tip, 5 Count… div.a-section > a.a-spacing-none > div.a-section > img._npack-asin-card_style_asin-image__2BYur
m.media-amazon.com/images/I/71c4ysOO7uL._AC_SX290_.jpg28.0 KiB24.3 KiB
Amazon Basics Tank Style Highlighters, Chisel Tip, Bible Highlighter, Office an… div.a-section > a.a-spacing-none > div.a-section > img._npack-asin-card_style_asin-image__2BYur
m.media-amazon.com/images/I/71GnmrMrKvL._AC_SX290_.jpg10.6 KiB5.8 KiB
Join Prime div.a-section > div > div.a-section > img._single-video-card_style_logo__2ZQ-N
m.media-amazon.com/images/I/01+7ypniCXL._SR294,96_FMpng_.png6.9 KiB5.3 KiB
Strength div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/311RqfH+RJL._SR420,420_.jpg12.5 KiB4.9 KiB

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.7 s
URLTime Spent
amazon.com/769 ms
www.amazon.com/951 ms
www.amazon.com/0.0 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

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

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: 300 ms 40.9 KiB
URLTransfer SizeEst Savings
d1nruqhae353qc.cloudfront.net/primesignup/widget.js62.2 KiB40.9 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: 2.7 s 605.2 KiB
URLTransfer SizeEst Savings
/1c5c1ecf7303/d6a7a58005ec/04c5ab18cd2d/challenge.js571.7 KiB314.5 KiB
m.media-amazon.com/images/I/91u1iWIbVEL.js?AUIClients/VideoJsCardsBuzz141.1 KiB99.5 KiB
/images/I/11I0WXrZVoL._RC|11Y+5x+kkTL.js,51DFoGfFeXL.js,1...97.1 KiB67.1 KiB
/images/I/01QvReFeJyL._RC|01kC46b9vjL.js,81zBkcMIQtL.js_....56.6 KiB36.2 KiB
/images/I/81Y3urUuC9L._RC|31ScU9YhQuL.js,01wcltxKR5L.js,4...58.7 KiB35.6 KiB
d1nruqhae353qc.cloudfront.net/primesignup/widget.js62.2 KiB28.5 KiB
m.media-amazon.com/images/I/81kCF8wuZEL.js?AUIClients/FWCIMAssets56.3 KiB23.8 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
www.amazon.com/2.6 s1.2 s124 ms
Unattributable1.5 s327 ms0.0 ms
d1nruqhae353qc.cloudfront.net/primesignup/widget.js1.3 s753 ms14 ms
/1c5c1ecf7303/d6a7a58005ec/04c5ab18cd2d/challenge.js728 ms460 ms191 ms
m.media-amazon.com/images/I/01B1WQYGlfL.js?xcp519 ms476 ms0.5 ms
/images/I/11I0WXrZVoL._RC|11Y+5x+kkTL.js,51DFoGfFeXL.js,1...367 ms234 ms50 ms
m.media-amazon.com/images/I/91u1iWIbVEL.js?AUIClients/VideoJsCardsBuzz341 ms156 ms78 ms
/images/I/51rG04VN8cL._RC|41kI-4KeOgL.js_.js?AUIClients/N...243 ms173 ms11 ms
m.media-amazon.com/images/I/21NZdO3uFtL.js?AUIClients/GWMMetricsJS191 ms11 ms1.4 ms
/images/I/81Y3urUuC9L._RC|31ScU9YhQuL.js,01wcltxKR5L.js,4...157 ms94 ms43 ms
m.media-amazon.com/images/I/61xJcNKKLXL.js?AUIClients/AmazonUIjQuery119 ms84 ms13 ms
/images/I/01+pnQJuQ0L._RC|01JFYUQurFL.js_.js?AUIClients/I...109 ms20 ms0.4 ms
m.media-amazon.com/images/I/81kCF8wuZEL.js?AUIClients/FWCIMAssets69 ms39 ms29 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 Evaluation4.1 s
Other1.8 s
Style & Layout1.0 s
Script Parsing & Compilation652 ms
Parse HTML & CSS424 ms
Rendering367 ms
Garbage Collection45 ms

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: 0.0 ms 179.8 KiB
URLTransfer SizeEst Savings
/images/I/11i1DYEiaoL._RC|01GaLSH4siL.css,51fMLkDdAPL.css...53.6 KiB51.8 KiB
._npack-asin-card_style_inlineErrorDetails__1NBx-{margin-right:-2px;vertical-align:text-top} …34.2 KiB31.4 KiB
._interactive-footer-card_style_container__3GKmA{grid-gap:8px;display:grid;gap:8px; … } …23.0 KiB23.0 KiB
._sign-in-v2_style_heading__1mnEu{font-size:20px} …19.4 KiB19.4 KiB
/images/I/51u-XQ7CSuL._RC|41iP6O--n8L.css,01FcI3FsaiL.css...17.2 KiB17.0 KiB
/images/I/51AuMXFXGYL._RC|51waPb-h-9L.css,51IpuNHA9ZL.css...22.1 KiB15.9 KiB
._single-creative-card_style_carouselContainer__3N7M1{-webkit-overflow-scrolling:touch; … } …10.9 KiB10.9 KiB
._single-video-card_style_carouselContainer__3N7M1{-webkit-overflow-scrolling:touch; … } …10.4 KiB10.4 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
m.media-amazon.com/images/I/B1+x3EznmqL.mp43.3 MiB
m.media-amazon.com/images/I/A19gUexczxL.mp41.5 MiB
/1c5c1ecf7303/d6a7a58005ec/04c5ab18cd2d/challenge.js572.2 KiB
www.amazon.com/439.2 KiB
m.media-amazon.com/images/I/B1+x3EznmqL.mp4147.2 KiB
m.media-amazon.com/images/I/91u1iWIbVEL.js?AUIClients/VideoJsCardsBuzz141.9 KiB
m.media-amazon.com/images/I/71Fnaxdd0ML._SR854,1368_.jpg134.0 KiB
/images/I/11I0WXrZVoL._RC|11Y+5x+kkTL.js,51DFoGfFeXL.js,1...97.8 KiB
m.media-amazon.com/images/S/sash/YixBCot3QJnxh4p.woff292.4 KiB
d1nruqhae353qc.cloudfront.net/primesignup/widget.js62.8 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA
m.media-amazon.com/images/I/71Fnaxdd0ML._SR854,1368_.jpg
Water bottles div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/21uV8kWvzeL._SR420,420_.jpg
Strength div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/311RqfH+RJL._SR420,420_.jpg
div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA
div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA
m.media-amazon.com/images/I/61YVR3d3UfL._SR285,456_.jpg
div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA
m.media-amazon.com/images/I/51UBK7rkwNL._SR285,456_.jpg
div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA
m.media-amazon.com/images/I/71VkESCzXaL._SR285,456_.jpg
div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA
m.media-amazon.com/images/I/5183et3khDL._SR285,456_.jpg
Running div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/31khqmn6+hL._SR140,140_.jpg
Yoga div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/31dNA7uebXL._SR140,140_.jpg
Loewe div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/41h4lIRlFKL._SR140,140_.jpg
Cartier div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/21T6J5vadcL._SR140,140_.jpg
Van Cleef div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/31GC2rbXvuL._SR140,140_.jpg
Celine div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/41q-wmyJUaL._SR140,140_.jpg
Laundry div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/31N8uaUzlKL._SR140,140_.jpg
Beauty & self care div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/31XibHdu7qL._SR140,140_.jpg
Water bottles div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/21eTN166MKL._SR140,140_.jpg
Kitchen div._multi-category-card_style_container__3HW_J > div > a.a-link-normal > img._multi-category-card_image_round-corners__22iOW
m.media-amazon.com/images/I/31NAxziZIaL._SR140,140_.jpg

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

●Layout shift culprits
●Document request latency
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Avoid long main-thread tasks 20 long tasks found
●Avoid non-composited animations 2 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 10 ms
●Server Backend Latencies 50 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 80 ms
○INP breakdown
○LCP request discovery
○User Timing marks and measures
○Avoid large layout shifts
93

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

Each ARIA `role` supports a specific subset of `aria-*` attributes. Mismatching these invalidates the `aria-*` attributes. Learn how to match ARIA attributes to their roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Search Amazon form#nav-search-form > div.nav-fill > div.nav-search-field > input#nav-search-keywords
Ship it. Stream it. Love it. Replay Unmute Terms apply. Get ready for school Ou… div#gwm-Deck-cf > div#gwm-window-layout > div#gwm-window-container > ul#gwm-window

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.

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
Conditions of Use div#nav-ftr > ul.nav-ftr-horiz > li.nav-li > a.nav-a
Privacy Notice div#nav-ftr > ul.nav-ftr-horiz > li.nav-li > a.nav-a
Consumer Health Data Privacy Disclosure div#nav-ftr > ul.nav-ftr-horiz > li.nav-li > a.nav-a
Your Ads Privacy Choices div#nav-ftr > ul.nav-ftr-horiz > li.nav-li > a.nav-a

These items highlight common accessibility best practices.

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
0 div#navbar > div#nav-logobar > div.nav-right > a#nav-button-cart
Water bottles Water bottles div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
Strength Strength div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
Running Running div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
Yoga Yoga div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
Loewe Loewe div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
Cartier Cartier div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
Van Cleef Van Cleef div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
Celine Celine div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
Laundry Laundry div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
Beauty & self care Beauty & self care div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
Water bottles Water bottles div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
Kitchen Kitchen div.a-cardui-body > div._multi-category-card_style_container__3HW_J > div > a.a-link-normal
○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-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●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
●`[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
●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
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●`[lang]` attributes have a valid value
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Image elements do not have `[alt]` attributes that are redundant text.
●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 the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<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.
○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.
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○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.
69

Best Practices

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLAspect Ratio (Displayed)Aspect Ratio (Actual)
Top 100+ dorm picks div._interactive-footer-card_style_container__3GKmA > div > a.a-link-normal > img._interactive-footer-card_image_round-corners__22iOW
m.media-amazon.com/images/I/31b9FPQkwmL._SR180,67_.jpg100 x 67 (1.49)180 x 67 (2.69)
Storage & organization div._interactive-footer-card_style_container__3GKmA > div > a.a-link-normal > img._interactive-footer-card_image_round-corners__22iOW
m.media-amazon.com/images/I/41XTmW4rjPL._SR180,67_.jpg100 x 67 (1.49)180 x 67 (2.69)
Clothing & more div._interactive-footer-card_style_container__3GKmA > div > a.a-link-normal > img._interactive-footer-card_image_round-corners__22iOW
m.media-amazon.com/images/I/41r+19hD92L._SR180,67_.jpg100 x 67 (1.49)180 x 67 (2.69)
Furniture & decor div._interactive-footer-card_style_container__3GKmA > div > a.a-link-normal > img._interactive-footer-card_image_round-corners__22iOW
m.media-amazon.com/images/I/31vck5T08-L._SR180,67_.jpg100 x 67 (1.49)180 x 67 (2.69)

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLDisplayed sizeActual sizeExpected size
div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA div._single-video-card_style_lazy-loaded-video__3m5dG > div._single-video-card_style_overlay__3Sx3u > a.a-link-normal > img._single-video-card_style_poster-image__1W0yA
317 x 507285 x 456476 x 761

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
Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.
m.media-amazon.com/images/I/61xJcNKKLXL.js?AUIClients/AmazonUIjQuery line 176, col 175
SharedStorage
www.amazon.com/ line 1623, col 2048

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
images-na.ssl-images-amazon.com/images/I/31LYmZEs45L.js line 3, col 388
Error logged with the Track&Report JS errors API(http://tiny/1covqr6l8/wamazindeClieUserJava): {"m":"Late loading module @m/mash","csm":"v5 ueLogError callee","logLevel":"WARN","attribution":"MIX","pageURL":"https://www.amazon.com/","s":[],"t":3493} [object Object]
www.amazon.com/tt/i
Failed to load resource: net::ERR_TRUST_TOKEN_OPERATION_FAILED
●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
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●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
○Use a strong HSTS policy
○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.

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.a-m-us > div#hmenu-container > div#hmenu-canvas > a#hmenu-back-to-top body.a-m-us > div#hmenu-container > div#hmenu-canvas > a#hmenu-back-to-top

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
●Links have descriptive text
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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