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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.

38

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 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:61.684 source:map[column:79609 line:12 type:source-location url:https://t.contentsquare.net/ss/4451/2/uxa.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:89.942 source:map[column:46 line:91 type:source-location url:https://www.adobe.com/libs/utils/decorate.js urlProvider:network]] map[reflowTime:40.897 source:map[type:text value:[unattributed]]] map[reflowTime:2.026 source:map[column:60656 line:1 type:source-location url:https://client.messaging.adobe.com/latest/AdobeMessagingClient.js urlProvider:network]] map[reflowTime:22.019 source:map[column:12104 line:0 type:source-location url:https://www.adobe.com/federal/libs/global-navigation/dist/main.js urlProvider:network]] map[reflowTime:42.982 source:map[column:16225 line:15 type:source-location url:https://www.adobe.com/marketingtech/d4d114c60e50/a0e989131fd5/launch-5dd5dd2177e6.min.js urlProvider:network]] map[reflowTime:29.38 source:map[column:116319 line:19 type:source-location url:https://siteintercept.qualtrics.com/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERSION=2.46.0&Q_CLIENTTYPE=web&Q_BRANDID=www.adobe.com urlProvider:network]] map[reflowTime:28.588 source:map[column:6616 line:0 type:source-location url:https://cdn.pdst.fm/ping.min.js urlProvider:network]] map[reflowTime:39.86 source:map[column:16923 line:7 type:source-location url:https://t.contentsquare.net/ss/4451/2/uxa.js urlProvider:network]] map[reflowTime:21.824 source:map[column:16866 line:7 type:source-location url:https://t.contentsquare.net/ss/4451/2/uxa.js urlProvider:network]]]

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
value: no origins were preconnected
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

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
www.adobe.com/marketingtech/d4d114c60e50/a0e989131fd5/launch-5dd5dd2177e6.min.js0.0 ms137.6 KiB
t.contentsquare.net/ss/4451/2/uxa.js900.0 s141.2 KiB
client.messaging.adobe.com/latest/AdobeMessagingClient.js0.0 ms37.6 KiB
www.everestjs.net/static/VisitorAPI.js0.0 ms20.7 KiB
www.everestjs.net/static/st.v3.js0.0 ms8.8 KiB
www.everestjs.net/static/st.v3.js0.0 ms8.8 KiB
cdn.pdst.fm/ping.min.js3600.0 s10.3 KiB
www.adobe.com/etc.clientlibs/globalnav/clientlibs/base/privacy-standalone.js21600.0 s12.5 KiB
snap.licdn.com/li.lms-analytics/insight.min.js86400.0 s18.7 KiB
client.messaging.adobe.com/latest/AdobeMessagingClient.css0.0 ms7.0 KiB
www.adobe.com/akam/13/4a29354121600.0 s9.4 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC1...0.0 ms5.9 KiB
s2.go-mpulse.net/boomerang/MXSSB-A58LJ-RJPHN-5VBV8-JQ3FW604800.0 s56.8 KiB
/unav/1.5/vendors-node_modules_intl_adobe-locales_dist_ad...43200.0 s11.1 KiB
prod.adobeccstatic.com/unav/1.5/UniversalNav.js43200.0 s10.6 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC5...0.0 ms4.7 KiB
www.everestjs.net/static/le/last-event-tag-latest.min.js0.0 ms4.3 KiB
/SIE/?Q_ZID=ZN_3n5vYIa1VY8b4LY3600.0 s4.6 KiB
/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERS...604800.0 s35.8 KiB
/unav/1.5/vendors-node_modules_cchome_ingest-react_index_...43200.0 s6.6 KiB
ct.pinterest.com/static/ct/token_create.js7200.0 s3.9 KiB
s.pinimg.com/ct/lib/main.10d2511a.js1209600.0 s27.3 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC4...0.0 ms2.5 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC9...0.0 ms2.3 KiB
prod.adobeccstatic.com/unav/1.5/AnalyticsProvider.9de9869f8d722dc25993.bundle.js43200.0 s4.1 KiB
/dxjsmodule/37.7ea1ffe71ad8c0799cc1.chunk.js?Q_CLIENTVERS...604800.0 s18.6 KiB
www.adobe.com/marketingtech/main.standard.min.js0.0 ms1.8 KiB
/unav/1.5/UniversalNavComponentLayout.8bf2b383a7f98e7ec8c...43200.0 s3.5 KiB
/unav/1.5/createCartComponent.2737a247d41ad89d70d1.bundle.js43200.0 s3.2 KiB
s.pinimg.com/ct/core.js7200.0 s2.1 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCc...0.0 ms1.5 KiB
/api/v3/ip.json?key=LDHxBA8hUB2yNQphwwEfblkR6cHtp1tmrI2XG...0.0 ms1.4 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCa...0.0 ms1.3 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC1...0.0 ms1.3 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC3...0.0 ms1.3 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCf...0.0 ms1.2 KiB
prod.adobeccstatic.com/unav/1.5/UniversalNav.css43200.0 s2.3 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC0...0.0 ms1.1 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCf...0.0 ms1.1 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC8...0.0 ms1.0 KiB
prod.adobeccstatic.com/unav/1.5/icons-default.a791d3f6a1d83b2f8b28.bundle.js43200.0 s2.0 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC4...0.0 ms973 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCf...0.0 ms969 B
www.adobe.com/content/dam/cc/optimization/pzn/fixPodHeightUSOnlyPostMax.js?v121600.0 s1.4 KiB
prod.adobeccstatic.com/unav/1.5/AEPProvider.97ecedf81c3cd8b00458.bundle.js43200.0 s1.8 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCd...0.0 ms886 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC9...0.0 ms858 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCf...0.0 ms847 B
prod.adobeccstatic.com/unav/1.5/layout.bundle.css43200.0 s1.6 KiB
prod.adobeccstatic.com/unav/1.5/localization.9e06d3f4d731aa249008.bundle.js43200.0 s1.6 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC1...0.0 ms805 B
prod.adobeccstatic.com/unav/1.5/TrayLayout.3c62a247e6dfbea3cf6f.bundle.js43200.0 s1.5 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCd...0.0 ms770 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC9...0.0 ms762 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCa...0.0 ms762 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC0...0.0 ms729 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC3...0.0 ms671 B
prod.adobeccstatic.com/unav/1.5/profile.caf56ff75a83df4ef4ea.bundle.js43200.0 s1.2 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCc...0.0 ms608 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCd...0.0 ms592 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC5...0.0 ms587 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCd...0.0 ms585 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC3...0.0 ms577 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC5...0.0 ms565 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC5...0.0 ms531 B
prod.adobeccstatic.com/unav/1.5/validator.154d4012a397a5d81fe7.bundle.js43200.0 s1.0 KiB
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC4...0.0 ms494 B
/config/com/93f19646-2418-418d-98af-f244ebb7c1cc.js?v=3.5...0.0 ms477 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC9...0.0 ms472 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RCc...0.0 ms462 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC7...0.0 ms460 B
prod.adobeccstatic.com/unav/1.5/tray.bundle.css43200.0 s897 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC4...0.0 ms433 B
prod.adobeccstatic.com/unav/1.5/profile.bundle.css43200.0 s826 B
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC9...0.0 ms380 B
/collect?v=2&fmt=js&pid=872&time=1776358724190&li_adsId=3...0.0 ms275 B
pixel.everesttech.net/rlsa/30850.0 ms152 B
/collect?v=2&fmt=js&pid=872&time=1776358724193&li_adsId=3...0.0 ms42 B
/p.css?s=1&k=hah7vzn&ht=tk&f=7180.7181.7182.7183.7185.224...604800.0 s173 B

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 761 ms
URLTime Spent
adobe.com/761 ms
www.adobe.com/0.0 ms

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.

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.adobe.com/libs/deps/lenis.min.js13.3 s1.2 s3.6 ms
Unattributable5.4 s715 ms0.0 ms
www.adobe.com/2.8 s17 ms0.9 ms
www.adobe.com/marketingtech/d4d114c60e50/a0e989131fd5/launch-5dd5dd2177e6.min.js1.4 s1.2 s76 ms
t.contentsquare.net/ss/4451/2/uxa.js1.0 s686 ms64 ms
www.adobe.com/libs/utils/decorate.js875 ms202 ms0.4 ms
www.googletagmanager.com/gtag/js?id=AW-1004494713&cx=c&gtm=4e64f0&bs=ctrl802 ms745 ms45 ms
www.googletagmanager.com/gtag/js?id=AW-951622910&cx=c&gtm=4e64f0&bs=ctrl600 ms354 ms156 ms
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js560 ms470 ms87 ms
www.adobe.com/libs/mep/ace1201/router-marquee/router-marquee.js462 ms227 ms2.5 ms
client.messaging.adobe.com/latest/AdobeMessagingClient.js443 ms354 ms42 ms
www.googletagmanager.com/gtag/js?id=AW-983956512&cx=c&gtm=4e64f0&bs=ctrl364 ms279 ms81 ms
/marketingtech/d4d114c60e50/a0e989131fd5/6a644147ae3a/RC5...327 ms243 ms0.5 ms
sc-static.net/scevent.min.js320 ms264 ms13 ms
www.googletagmanager.com/gtag/js?id=DC-9212252&cx=c&gtm=4e64f0&bs=ctrl305 ms251 ms50 ms
www.adobe.com/mas/libs/commerce.js301 ms255 ms0.7 ms
www.googletagmanager.com/gtag/js?id=AW-987390658293 ms183 ms98 ms
cdn.pdst.fm/ping.min.js271 ms149 ms4.6 ms
/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERS...267 ms114 ms14 ms
www.adobe.com/libs/utils/utils.js254 ms181 ms17 ms
www.googletagmanager.com/gtag/js?id=DC-10740885&cx=c&gtm=4e64f0&bs=ctrl249 ms207 ms40 ms
s2.go-mpulse.net/boomerang/MXSSB-A58LJ-RJPHN-5VBV8-JQ3FW243 ms164 ms71 ms
prod.adobeccstatic.com/unav/1.5/UniversalNav.js241 ms112 ms4.0 ms
s.pinimg.com/ct/lib/main.10d2511a.js224 ms159 ms13 ms
www.adobe.com/federal/libs/global-navigation/dist/main.js218 ms135 ms0.8 ms
commerce.adobe.com/store/iframe/preload-optimized.html202 ms80 ms5.0 ms
www.adobe.com/libs/mep/ace1201/elastic-carousel/elastic-carousel.js196 ms174 ms0.4 ms
www.adobe.com/libs/blocks/global-navigation/utilities/utilities.js172 ms117 ms0.6 ms
www.adobe.com/akam/13/4a293541172 ms158 ms5.6 ms
www.adobe.com/libs/deps/imslib.min.js132 ms104 ms7.3 ms
snap.licdn.com/li.lms-analytics/insight.min.js128 ms90 ms6.8 ms
www.adobe.com/libs/blocks/merch/merch.js76 ms70 ms4.7 ms
analytics.tiktok.com/i18n/pixel/static/identify_5cff1caf.js65 ms49 ms15 ms
www.adobe.com/libs/features/personalization/personalization.js64 ms42 ms0.5 ms
www.everestjs.net/static/le/last-event-tag-latest.min.js61 ms37 ms4.2 ms
www.adobe.com/libs/blocks/fragment/fragment.js58 ms48 ms0.2 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
Other16.1 s
Script Evaluation10.6 s
Style & Layout4.3 s
Rendering1.3 s
Script Parsing & Compilation1.1 s
Garbage Collection478 ms
Parse HTML & CSS259 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 a sub frame.Actionable

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
Footer logo body > footer.global-footer > div.feds-footer-logo > img
www.adobe.com/libs/mep/ace1201/global-footer/adobe-logo-full.svg
div.explore-card-content > p > picture > img div.explore-card-content > p > picture > img
www.adobe.com/federal/assets/svgs/firefly-appicon-256.svg
div.explore-card-content > p > picture > img div.explore-card-content > p > picture > img
www.adobe.com/federal/assets/svgs/acrobat-pro.svg
div.explore-card-content > p > picture > img div.explore-card-content > p > picture > img
www.adobe.com/federal/assets/svgs/experience-cloud-logo.svg
div.explore-card-content > p > picture > img div.explore-card-content > p > picture > img
www.adobe.com/federal/assets/svgs/experience-cloud-logo.svg
div.explore-card-content > p > picture > img div.explore-card-content > p > picture > img
www.adobe.com/federal/assets/svgs/creative-cloud.svg
Adobe, Inc. div.feds-brand-container > a.feds-brand > span.feds-brand-image > img
www.adobe.com/federal/ace1201/assets/mobile-adobe-logo-white.svg
div.explore-card-content > p > picture > img div.explore-card-content > p > picture > img
div.explore-card-content > p > picture > img div.explore-card-content > p > picture > img
div.explore-card-content > p > picture > img div.explore-card-content > p > picture > img
div.explore-card-content > p > picture > img div.explore-card-content > p > picture > img

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

Layout shift culprits
Optimize DOM size
Improve image delivery
LCP breakdown
Modern HTTP
Render blocking requests
Optimize viewport for mobile
Minify CSS
Reduce unused CSS
User Timing marks and measures 43 user timings
Avoid long main-thread tasks 20 long tasks found
Avoid non-composited animations 37 animated elements found
Network Requests
Network Round Trip Times 70 ms
Server Backend Latencies 230 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 50 ms
Avoid large layout shifts 2 layout shifts found
INP breakdown
LCP request discovery
100

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.

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
Creativity and design Create with the top tools. Do it all with industry-lead… div.section > div.elastic-carousel > div.elastic-carousel-container > a.elastic-carousel-item
Read story div.news-item > div.foreground > p.body-md > a.standalone-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]`s have all required `[aria-*]` attributes
`[role]` values are valid
`[aria-*]` attributes have valid values
`[aria-*]` attributes are valid and not misspelled
Buttons have an accessible name
Image elements have `[alt]` attributes
`[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
`[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
Touch targets have sufficient size and spacing.
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"]`
Uses ARIA roles only on compatible elements
Image elements do not have `[alt]` attributes that are redundant text.
`[accesskey]` values are unique
Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
ARIA input fields have accessible names
ARIA `meter` elements have accessible names
ARIA `progressbar` elements have accessible names
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`[role]`s are contained by their required parent element
Elements with the `role=text` attribute do not have focusable descendents.
ARIA toggle fields have accessible names
ARIA `tooltip` elements have accessible names
ARIA `treeitem` elements have accessible names
The page contains a heading, skip link, or landmark region
`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Definition list items are wrapped in `<dl>` elements
ARIA IDs are unique
No form fields have multiple labels
`<frame>` or `<iframe>` elements have a title
`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
Input buttons have discernible text.
`<input type="image">` elements have `[alt]` text
Form elements have associated labels
The document does not use `<meta http-equiv="refresh">`
`<object>` elements have alternate text
Select elements have associated label elements.
Skip links are focusable.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
`[lang]` attributes have a valid value
Tables have different content in the summary attribute and `<caption>`.
All heading elements contain content.
Identical links have the same purpose.
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
Unload event listeners are deprecated and will be removed.
AttributionReporting

Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Issue type
Cookie
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
Ensure CSP is effective against XSS attacks
Use a strong HSTS policy
Ensure proper origin isolation with COOP
Mitigate clickjacking with XFO or CSP
Mitigate DOM-based XSS with Trusted Types
Redirects HTTP traffic to HTTPS
Detected JavaScript libraries
85

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Crawling and Indexing

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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 are crawlable
Image elements have `[alt]` attributes
Document has a valid `hreflang`
Document has a valid `rel=canonical`

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