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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.

37

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:0.9451189999999999] map[node:map[boundingRect:map[bottom:3836 height:3635 left:0 right:1350 top:201 width:1350] lhId:page-25-DIV nodeLabel:Buzzworthy books New and noteworthy Expand your horizons Discover fresh and cur… path:1,HTML,4,BODY,0,DIV,45,DIV,12,DIV,0,DIV,5,DIV selector:div#brixlayer-page-content > div.a-section > div.a-section > div.a-section snippet:<div data-brix-element-id="filterableZonePercolate" data-csa-c-content-id="filterableZonePercolate" data-csa-c-slot-id="root.filterableZonePercolate" data-csa-c-type="slot" class="a-section a-spacing-none" data-csa-c-id="w30s3s-c83lix-lqyqfo-pu7xq2"> type:node] score:0.852128] map[node:map[boundingRect:map[bottom:1107 height:440 left:16 right:1334 top:667 width:1318] lhId:page-29-DIV nodeLabel:Loading path:1,HTML,4,BODY,0,DIV,45,DIV,12,DIV,0,DIV,5,DIV,11,DIV,2,DIV selector:div.a-section > div.a-section > div.a-section > div.celwidget snippet:<div class="celwidget pd_rd_w-VMn3f content-id-amzn1.sym.e0527c21-1e95-40b3-a63b-b7ff5…" cel_widget_id="books-multiformat-shoveler_desktop-books-storefront_2" data-csa-op-log-render="" data-csa-c-content-id="amzn1.sym.e0527c21-1e95-40b3-a63b-b7ff53bbe8a5" data-csa-c-slot-id="zeitgeist-3" data-csa-c-type="widget" data-csa-c-painter="books-multiformat-shoveler-cards" data-csa-c-id="w135ch-bugiil-49e3vz-lz0vz7" data-cel-widget="books-multiformat-shoveler_desktop-books-storefront_2"> type:node] score:0.066997] map[node:map[boundingRect:map[bottom:667 height:334 left:985 right:1162 top:333 width:177] lhId:page-31-DIV nodeLabel:The Camp of the Saints path:1,HTML,4,BODY,0,DIV,45,DIV,12,DIV,0,DIV,5,DIV,11,DIV,1,DIV,1,DIV,0,DIV,0,DIV,0,BDS-RENDER-CONTEXT-PROVIDER,1,BDS-CAROUSEL,5,BDS-CAROUSEL-ITEM,0,DIV,0,BDS-UNIFIED-BOOK-FACEOUT,a,#document-fragment,1,DIV selector:div.unified-book-faceout snippet:<div class="unified-book-faceout standardV2 light desktop " style="font-family: var(--bds-font-family-functional-body)" data-csa-c-type="item" data-csa-c-item-type="asin" data-csa-c-item-id="B0FG4MJS8K"> type:node] score:0.01773] map[node:map[boundingRect:map[bottom:60 height:60 left:960 right:1350 top:0 width:390] lhId:page-22-DIV nodeLabel:EN Hello, sign in Account & Lists Returns & Orders 0 Cart path:1,HTML,4,BODY,0,DIV,33,HEADER,0,DIV,0,DIV,2,DIV selector:header#navbar-main > div#navbar > div#nav-belt > div.nav-right snippet:<div class="nav-right"> type:node] score:0.004726] map[node:map[boundingRect:map[bottom:139 height:40 left:613 right:725 top:99 width:112] lhId:page-37-SPAN nodeLabel:Your Books path:1,HTML,4,BODY,0,DIV,33,HEADER,0,DIV,6,DIV,1,DIV,4,DIV,0,DIV,0,DIV,17,SPAN selector:div#CardInstancewj0zkqPPwMGmk5hMvUHUoQ > div.a-section > div.a-section > span#your-books snippet:<span class="a-declarative" data-action="a-popover" data-csa-c-type="widget" data-csa-c-func-deps="aui-da-a-popover" data-a-popover="{&quot;dataStrategy&quot;:&quot;preload&quot;,&quot;name&quot;:&quot;a6yipqec5euk4w2dq8oueqfk&quot;,&quot;closeButton&quot;:…" id="your-books" data-csa-c-id="3f3khh-no9o4h-dl5j3p-onxu3o"> type:node] score:0.003145]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
m.media-amazon.com/images/S/sash/rlTCFdyUZFR9mQI.woff245 ms
m.media-amazon.com/images/S/sash/1yLvxs7jafx7AW$.woff245 ms
m.media-amazon.com/images/S/sash/gyrV-mLs7VcgiFC.woff240 ms
m.media-amazon.com/images/S/sash/MexTn601PAhMvAn.woff240 ms
m.media-amazon.com/images/S/sash/ukoYNzKrqDRxhTq.woff240 ms
m.media-amazon.com/images/S/sash/VjTR4RqBzY0mUYx.woff235 ms
m.media-amazon.com/images/S/sash/NvWNxKhmDbgI1lq.woff235 ms
m.media-amazon.com/images/S/sash/1Ep1kWVX5g73xrY.woff235 ms
m.media-amazon.com/images/I/61Gu5MYhFyL.ttf30 ms
m.media-amazon.com/images/S/sash/KwhNPG8Jz-Vz2X7.woff230 ms
m.media-amazon.com/images/S/sash/lZemoC3awOEEzLR.woff230 ms
m.media-amazon.com/images/S/sash/pnZF3$c0rgepEUt.woff230 ms
m.media-amazon.com/images/S/sash/-w6hwcDxlefrOYI.woff230 ms
m.media-amazon.com/images/S/sash/8AuIu4whVB5EMoJ.woff230 ms
m.media-amazon.com/images/I/616IPb5jvvL.ttf25 ms
m.media-amazon.com/images/S/sash/ozb5-CLHQWI6Soc.woff225 ms
m.media-amazon.com/images/S/sash/Wdqa3S7nfGc3Naj.woff225 ms
m.media-amazon.com/images/S/sash/WOnTLzkiaEccV7F.woff220 ms
m.media-amazon.com/images/S/sash/2SazJx$EeTHfhMN.woff220 ms
m.media-amazon.com/images/I/61m0rIzJkqL.ttf10 ms
m.media-amazon.com/images/S/sash/Dv1WQ5DdeMS5qP7.woff210 ms
m.media-amazon.com/images/S/sash/pDxWAF1pBB0dzGB.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:11.772 source:map[column:457 line:6433 type:source-location url:https://m.media-amazon.com/images/I/91fVq2f+7aL.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:14.105 source:map[type:text value:[unattributed]]] map[reflowTime:24.911 source:map[column:2430 line:5190 type:source-location url:https://m.media-amazon.com/images/I/91fVq2f+7aL.js urlProvider:network]] map[reflowTime:16.623 source:map[column:2562 line:5190 type:source-location url:https://m.media-amazon.com/images/I/91fVq2f+7aL.js urlProvider:network]] map[reflowTime:11.772 source:map[column:619 line:6432 type:source-location url:https://m.media-amazon.com/images/I/91fVq2f+7aL.js urlProvider:network]]]

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
United States a.nav-a > span.icp-nav-link-inner > span.nav-line-2 > span.icp-nav-flag
m.media-amazon.com/images/S/sash/MAbi1rCjQI9H2y0.png44.3 KiB35.0 KiB
Murder in the Secret Garden (A Book Retreat Mystery 3) div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/61pGIlVLGVL._UY266_FMwebp_.jpg?aicid=books-desi...16.8 KiB9.6 KiB
Frozen by Stardust (Beasts of the Briar Book 5) div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51wRh5sj0QL._UY266_FMwebp_.jpg?aicid=books-desi...15.9 KiB8.7 KiB
Taming the Heart (Crimson Ridge Book 3) div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/5125FaI4G5L._UY266_FMwebp_.jpg?aicid=books-desi...14.8 KiB7.7 KiB
The Let Them Theory: A Life-Changing Tool That Millions of People Can't Stop Ta… div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51UmNg33hCL._UY266_FMwebp_.jpg?aicid=books-desi...14.5 KiB6.9 KiB
My Dreadful Darling (Hollow Graves Duet Book 1) div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/510L+VoUDEL._UY266_FMwebp_.jpg?aicid=books-desi...14.3 KiB6.7 KiB
Dungeon Crawler Carl: Dungeon Crawler Carl Book 1 div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/514McFhKyML._UY266_FMwebp_.jpg?aicid=books-desi...13.5 KiB6.3 KiB
Rites of the Starling: A Slow-Burn Epic Romantasy (Shield of Sparrows Book 2) div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51k1hIr3lGL._UY266_FMwebp_.jpg?aicid=books-desi...13.8 KiB6.1 KiB
Marsh Mystics (Miss Fortune Mysteries Book 30) div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/518A9JVaNkL._UY266_FMwebp_.jpg?aicid=books-desi...13.4 KiB5.9 KiB
The Vanished Birds: A Novel div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51zfo+ZlYVL._UY266_FMwebp_.jpg?aicid=books-desi...13.5 KiB5.8 KiB
London Falling: A Mysterious Death in a Gilded City and a Family's Search for T… div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/514r+x+PrTL._UY266_FMwebp_.jpg?aicid=books-desi...13.2 KiB5.6 KiB
The Final System div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51nOpXEKVhL._UY266_FMwebp_.jpg?aicid=books-desi...13.1 KiB5.6 KiB
London Falling: A Mysterious Death in a Gilded City and a Family's Search for T… div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51oy7hf6odL._UY266_FMwebp_.jpg?aicid=books-desi...13.1 KiB5.5 KiB
The Camp of the Saints div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/515iYWlQInL._UY266_FMwebp_.jpg?aicid=books-desi...13.2 KiB5.5 KiB
When The Storm Passes: A Thriller div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51Mx6pp252L._UY266_FMwebp_.jpg?aicid=books-desi...12.9 KiB5.5 KiB
The Wrong Catch: A Football Romance (The Wrong Player Series Book 3) div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51wNPHPuz6L._UY266_FMwebp_.jpg?aicid=books-desi...13.0 KiB5.4 KiB
Betrayal Road (Torpedo Ink Book 9) div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51j+cFLRbCL._UY266_FMwebp_.jpg?aicid=books-desi...11.8 KiB4.7 KiB
UNTAMED: A Dark Mafia Cowboy Romance (Beneath The Reign Book 1) div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51zPheQ0nKL._UY266_FMwebp_.jpg?aicid=books-desi...12.1 KiB4.6 KiB
Unexpected (A Silver Creek Romance Book 1) div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51GDldqgolL._UY266_FMwebp_.jpg?aicid=books-desi...11.6 KiB4.5 KiB
The Jesus Discoveries: 10 Historic Finds That Bring Us Face-to-Face with Jesus div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/518VSTsV4WL._UY266_FMwebp_.jpg?aicid=books-desi...11.8 KiB4.3 KiB
The Price of Honey (Deadly Ambition collection) div.coverImageWrapper > picture.fixedHeight > img.coverImage
/images/I/51SPXc1l5AL._UY266_FMwebp_.jpg?aicid=books-desi...11.7 KiB4.0 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:2215.894 label:Time to first byte subpart:timeToFirstByte] map[duration:1106.099 label:Resource load delay subpart:resourceLoadDelay] map[duration:78.703 label:Resource load duration subpart:resourceLoadDuration] map[duration:287.089 label:Element render delay subpart:elementRenderDelay]]
lhId: page-21-IMG
nodeLabel: Purple State: A Small-Town Romcom Debut Novel from the Bestselling Author and F…
path: 1,HTML,4,BODY,0,DIV,45,DIV,12,DIV,0,DIV,5,DIV,11,DIV,1,DIV,1,DIV,0,DIV,0,DIV,0,BDS-RENDER-CONTEXT-PROVIDER,1,BDS-CAROUSEL,2,BDS-CAROUSEL-ITEM,0,DIV,0,BDS-UNIFIED-BOOK-FACEOUT,a,#document-fragment,1,DIV,3,A,2,BDS-BOOK-COVER-IMAGE,a,#document-fragment,1,DIV,3,PICTURE,3,IMG
selector: div.coverImageWrapper > picture.fixedHeight > img.coverImage
snippet: <img style="max-height: 266px; min-height: 133px;" height="266" class="coverImage " alt="Purple State: A Small-Town Romcom Debut Novel from the Bestselling Author …">

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-21-IMG
nodeLabel: Purple State: A Small-Town Romcom Debut Novel from the Bestselling Author and F…
path: 1,HTML,4,BODY,0,DIV,45,DIV,12,DIV,0,DIV,5,DIV,11,DIV,1,DIV,1,DIV,0,DIV,0,DIV,0,BDS-RENDER-CONTEXT-PROVIDER,1,BDS-CAROUSEL,2,BDS-CAROUSEL-ITEM,0,DIV,0,BDS-UNIFIED-BOOK-FACEOUT,a,#document-fragment,1,DIV,3,A,2,BDS-BOOK-COVER-IMAGE,a,#document-fragment,1,DIV,3,PICTURE,3,IMG
selector: div.coverImageWrapper > picture.fixedHeight > img.coverImage
snippet: <img style="max-height: 266px; min-height: 133px;" height="266" class="coverImage " alt="Purple State: A Small-Town Romcom Debut Novel from the Bestselling Author …">

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
/images/I/51waPb-h-9L._RC|71-kuAf1e-L.css,41WcY5PbsbL.css...57.0 KiB82 ms
/images/I/11WsGYSItxL._RC|01DE6WSvLKL.css,41ixaNR85ML.css...28.3 KiB
/images/I/21skJF47J6L._RC|51Y8Xg9itbL.css_.css?AUIClients...6.8 KiB222 ms

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
/images/G/01//US-hq/2020/img/Books/CatFav/Q2_2025/Freida_...86400.0 s7.5 KiB
/images/G/01//US-hq/2020/img/Books/CatFav/Q3_2025/Kristi_...86400.0 s7.3 KiB
m.media-amazon.com/images/G/01/books-voyager/subnav/Desktop_Kids_Logo.svg86400.0 s6.5 KiB
/images/G/01//US-hq/2020/img/Books/CatFav/Q2_2025/Jen_Wil...86400.0 s6.4 KiB
m.media-amazon.com/images/G/01/books-voyager/subnav/Desktop_PRR_Logo.svg86400.0 s4.7 KiB
m.media-amazon.com/images/G/01/books-voyager/subnav/Desktop_Comixology_Logo.svg86400.0 s4.0 KiB
/images/G/01//US-hq/2020/img/Books/CatFav/Q2_2026/James_P...86400.0 s3.3 KiB
/images/G/01//US-hq/2020/img/Books/CatFav/Q2_2026/Game_Ch...86400.0 s3.1 KiB
/images/G/01//US-hq/2020/img/Books/CatFav/Q2_2026/Sarah_J...86400.0 s2.9 KiB
m.media-amazon.com/images/G/01/books-voyager/subnav/KULogo.svg86400.0 s2.8 KiB
m.media-amazon.com/images/G/01/books-voyager/subnav/Desktop_KU_Logo.svg86400.0 s2.8 KiB
/images/G/01//US-hq/2020/img/Books/CatFav/Q2_2026/Elin_Hi...86400.0 s2.8 KiB
m.media-amazon.com/images/G/01/books-voyager/subnav/Subnav_BooksLogo.svg86400.0 s1.9 KiB
m.media-amazon.com/images/G/01/books-voyager/subnav/Desktop_Audible_Logo.svg86400.0 s1.8 KiB
m.media-amazon.com/images/G/01/books-voyager/subnav/external_link.svg86400.0 s800 B
m.media-amazon.com/images/G/01/Books/BooksDesignSystem/selected-light.svg86400.0 s793 B
m.media-amazon.com/images/G/01/Books/BooksDesignSystem/icons/starEmptySmall.svg86400.0 s705 B
m.media-amazon.com/images/G/01/Books/BooksDesignSystem/icons/starHalfSmall.svg86400.0 s669 B
m.media-amazon.com/images/G/01/Books/BooksDesignSystem/icons/chevron-left.svg86400.0 s650 B
m.media-amazon.com/images/G/01/Books/BooksDesignSystem/icons/chevron-right.svg86400.0 s649 B
m.media-amazon.com/images/G/01/Books/BooksDesignSystem/icons/starFullSmall.svg86400.0 s615 B
m.media-amazon.com/images/G/01/books-voyager/subnav/Collapsed.svg86400.0 s583 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms150 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms150 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms149 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms148 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms148 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms148 B
/1/batch/1/OP/ATVPDKIKX0DER:131-7075972-9919122:C7G1EQZ6Z...0.0 ms148 B
/rd/uedata?rid=C7G1EQZ6ZJS58TY3M496&sid=131-7075972-99191...0.0 ms71 B
/rd/uedata?rid=C7G1EQZ6ZJS58TY3M496&sid=131-7075972-99191...0.0 ms71 B

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: 1.6 s
URLTime Spent
bookdepository.com/700 ms
amazon.com/books919 ms
www.amazon.com/books0.0 ms
www.amazon.com/b/ref=usbk_surl_books/?node=2831550.0 ms
www.amazon.com/amz-books/store?ou=psf&ref_=usbk_surl_books0.0 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
Buzzworthy books New and noteworthy Expand your horizons Discover fresh and cur… div#brixlayer-page-content > div.a-section > div.a-section > div.a-section
0.852
Loading div.a-section > div.a-section > div.a-section > div.celwidget
0.067
The Camp of the Saints div.unified-book-faceout
0.018
EN Hello, sign in Account & Lists Returns & Orders 0 Cart header#navbar-main > div#navbar > div#nav-belt > div.nav-right
0.005
Your Books div#CardInstancewj0zkqPPwMGmk5hMvUHUoQ > div.a-section > div.a-section > span#your-books
0.003
Categories div#CardInstancewj0zkqPPwMGmk5hMvUHUoQ > div.a-section > div.a-section > span#categories
0.000
Untitled Empyrean (Not Book Four) div.coverImageWrapper > picture.fixedHeight
0.000

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

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: 140 ms 536.6 KiB
URLTransfer SizeEst Savings
m.media-amazon.com/images/I/A1V2CkXb8tL.js302.2 KiB181.6 KiB
m.media-amazon.com/images/I/81tmPvvnEdL.js88.7 KiB88.5 KiB
m.media-amazon.com/images/I/91K0JIEE1LL.js167.6 KiB79.7 KiB
/images/I/51jC0T3AfxL._RC|71UfmdDxASL.js,416IQz5llzL.js,0...124.0 KiB77.4 KiB
/images/I/11I0WXrZVoL._RC|11Y+5x+kkTL.js,51vYHGMfzIL.js,1...68.7 KiB48.2 KiB
m.media-amazon.com/images/I/81kCF8wuZEL.js?AUIClients/FWCIMAssets56.3 KiB35.4 KiB
m.media-amazon.com/images/I/91fVq2f+7aL.js90.8 KiB25.7 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/amz-books/store?ou=psf&ref_=usbk_surl_books1.7 s274 ms33 ms
m.media-amazon.com/images/I/91fVq2f+7aL.js518 ms391 ms21 ms
m.media-amazon.com/images/I/91K0JIEE1LL.js463 ms353 ms31 ms
Unattributable327 ms6.5 ms0.0 ms
/images/I/51jC0T3AfxL._RC|71UfmdDxASL.js,416IQz5llzL.js,0...271 ms148 ms20 ms
m.media-amazon.com/images/I/A1V2CkXb8tL.js115 ms60 ms54 ms
/images/I/11I0WXrZVoL._RC|11Y+5x+kkTL.js,51vYHGMfzIL.js,1...81 ms43 ms9.5 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 Evaluation1.3 s
Other879 ms
Style & Layout569 ms
Rendering509 ms
Script Parsing & Compilation208 ms
Parse HTML & CSS77 ms
Garbage Collection26 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: 20 ms 178.2 KiB
URLTransfer SizeEst Savings
/images/I/51waPb-h-9L._RC|71-kuAf1e-L.css,41WcY5PbsbL.css...104.4 KiB94.8 KiB
/images/I/11WsGYSItxL._RC|01DE6WSvLKL.css,41ixaNR85ML.css...50.8 KiB49.3 KiB
m.media-amazon.com/images/I/71vgWNFeerL.css34.1 KiB34.1 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/A1V2CkXb8tL.js313.3 KiB
m.media-amazon.com/images/I/91K0JIEE1LL.js167.9 KiB
www.amazon.com/amz-books/store?ou=psf&ref_=usbk_surl_books131.7 KiB
/images/I/51jC0T3AfxL._RC|71UfmdDxASL.js,416IQz5llzL.js,0...125.1 KiB
m.media-amazon.com/images/I/91fVq2f+7aL.js94.3 KiB
m.media-amazon.com/images/I/81tmPvvnEdL.js89.0 KiB
/images/I/11I0WXrZVoL._RC|11Y+5x+kkTL.js,51vYHGMfzIL.js,1...69.0 KiB
/images/I/51waPb-h-9L._RC|71-kuAf1e-L.css,41WcY5PbsbL.css...57.0 KiB
m.media-amazon.com/images/I/81kCF8wuZEL.js?AUIClients/FWCIMAssets56.6 KiB
m.media-amazon.com/images/I/61m0rIzJkqL.ttf46.1 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
Books div.a-section > div.a-section > a.a-link-normal > img._Ym9va_imageItem_17Tdi
m.media-amazon.com/images/G/01/books-voyager/subnav/Subnav_BooksLogo.svg

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

●Optimize DOM size
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Avoid long main-thread tasks 5 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 240 ms
●Server Backend Latencies 470 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 300 ms
○INP breakdown
○User Timing marks and measures
○Avoid non-composited animations
80

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-bar-form > div.nav-fill > div.nav-search-field > input#twotabsearchtextbox

ARIA dialog elements without accessible names may prevent screen readers users from discerning the purpose of these elements. Learn how to make ARIA dialog elements more accessible.

Why this matters

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

Source: MDN Permissions-Policy

Failing Elements
div#a-page > header#navbar-main > div#navbar > div#nav-flyout-ewc div#a-page > header#navbar-main > div#navbar > div#nav-flyout-ewc

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.

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
Get to Know Us div.navFooterVerticalColumn > div.navFooterVerticalRow > div.navFooterLinkCol > div.navFooterColHead

These are opportunities to improve keyboard navigation in your application.

Contrast

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Start here. div.nav-signin-tt > div#nav-signin-tooltip > div.nav-signin-tooltip-footer > a.nav-a

These are opportunities to improve the legibility of your content.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Today's Deals Gift Cards Sell Registry Prime Video Customer Service Disability … div.nav-fill > div#nav-xshop-container > div#nav-xshop > ul.nav-ul

Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item
li.carousel-item li.carousel-item

These are opportunities to improve the experience of reading tabular or list data using 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
Expand to Change Language or Country div.nav-right > div#nav-tools > div#icp-nav-flyout > button.nav-flyout-button
Expand Account and Lists div.nav-right > div#nav-tools > div#nav-link-accountList > button.nav-flyout-button
4.7 79,460 div.starRating > a.starRatingLink
3.9 8 div.starRating > a.starRatingLink
4.7 221,343 div.starRating > a.starRatingLink
4.8 105 div.starRating > a.starRatingLink
4.8 259 div.starRating > a.starRatingLink
4.8 13 div.starRating > a.starRatingLink
4.0 184 div.starRating > a.starRatingLink
4.6 95,089 div.starRating > a.starRatingLink
4.6 41,839 div.starRating > a.starRatingLink
4.4 617 div.starRating > a.starRatingLink
4.2 5,433 div.starRating > a.starRatingLink
4.4 1,308 div.starRating > a.starRatingLink
4.2 7,712 div.starRating > a.starRatingLink
4.2 9,002 div.starRating > a.starRatingLink
4.7 4,371 div.starRating > a.starRatingLink
4.6 2,032 div.starRating > a.starRatingLink
4.4 674 div.starRating > a.starRatingLink
4.9 2,692 div.starRating > a.starRatingLink
4.7 1,613 div.starRating > a.starRatingLink
4.8 1,028 div.starRating > a.starRatingLink
4.4 48,464 div.starRating > a.starRatingLink
3.4 1,895 div.starRating > a.starRatingLink
4.9 26 div.starRating > a.starRatingLink
4.2 125,931 div.starRating > a.starRatingLink
4.7 65,111 div.starRating > a.starRatingLink
5.0 20 div.starRating > a.starRatingLink
3.7 14,963 div.starRating > a.starRatingLink
4.5 46,069 div.starRating > a.starRatingLink
4.6 13,114 div.starRating > a.starRatingLink
4.4 285 div.starRating > a.starRatingLink
4.6 594 div.starRating > a.starRatingLink
4.8 180 div.starRating > a.starRatingLink
4.7 106 div.starRating > a.starRatingLink
4.6 402 div.starRating > a.starRatingLink
4.1 1,215 div.starRating > a.starRatingLink
4.8 158 div.starRating > a.starRatingLink
4.9 41 div.starRating > a.starRatingLink
4.4 230 div.starRating > a.starRatingLink
4.6 394 div.starRating > a.starRatingLink
4.4 17 div.starRating > a.starRatingLink
5.0 2 div.starRating > a.starRatingLink
5.0 8 div.starRating > a.starRatingLink
4.4 230 div.starRating > a.starRatingLink
4.7 24 div.starRating > a.starRatingLink
4.5 306 div.starRating > a.starRatingLink
5.0 1 div.starRating > a.starRatingLink
4.8 18 div.starRating > a.starRatingLink
4.7 24 div.starRating > a.starRatingLink
4.0 184 div.starRating > a.starRatingLink
4.3 35 div.starRating > a.starRatingLink
5.0 1 div.starRating > a.starRatingLink
4.2 11 div.starRating > a.starRatingLink
4.4 26 div.starRating > a.starRatingLink
4.6 8,631 div.starRating > a.starRatingLink
3.8 47 div.starRating > a.starRatingLink
4.6 622 div.starRating > a.starRatingLink
4.6 394 div.starRating > a.starRatingLink
4.6 402 div.starRating > a.starRatingLink
3.9 150 div.starRating > a.starRatingLink
4.0 157 div.starRating > a.starRatingLink
2.7 106 div.starRating > a.starRatingLink
4.1 68 div.starRating > a.starRatingLink
4.1 1,215 div.starRating > a.starRatingLink
4.4 50 div.starRating > a.starRatingLink
4.1 90 div.starRating > a.starRatingLink
4.6 42 div.starRating > a.starRatingLink

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
EN div.nav-right > div#nav-tools > div#icp-nav-flyout > a.nav-a
○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]` 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
●Select elements have associated label elements.
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●ARIA `progressbar` elements have accessible names
●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 have a discernible name
●No element has a `[tabindex]` value greater than 0
●`[lang]` attributes have a valid value
●Skip links are focusable.
●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 input fields have accessible names
○ARIA `meter` elements have accessible names
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<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">`
○`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
○`<object>` elements have alternate text
○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.
○`<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.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
77

Best Practices

General

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
SharedStorage
www.amazon.com/amz-books/store?ou=psf&ref_=usbk_surl_books line 3420, 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
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
●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
●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
83

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

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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
/amz-books/seeMore/?_encoding=UTF8&pd_rd_w=yyUho&content-...See more
/amz-books/seeMore/?_encoding=UTF8&pd_rd_w=KtXme&content-...See more
/amz-books/seeMore/?_encoding=UTF8&pd_rd_w=uznKc&content-...See more
/amz-books/seeMore/?_encoding=UTF8&pd_rd_w=NL2Z9&content-...See more
www.amazon.com/b?node=17143709011See more
www.amazon.com/firstreads/ref=apubna_fr_na_10002_im_si_at_usfSee 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
●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`

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