Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

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.

Request	Cache TTL	Transfer Size
assets.adobedtm.com/launch-EN10e66088202b43a3b7f30a6ded39776d.min.js	3600.0 s	184.3 KiB
hit.uptrendsdata.com/rum.min.js	3600.0 s	36.8 KiB
www.arm.com/Coveo/Hive/js/CoveoJsSearch.Lazy.min.js	1296000.0 s	197.4 KiB
www.arm.com/shared/bundle/all.js?v=1.0.9587.17207	1296000.0 s	100.5 KiB
www.arm.com/shared/bundle/all.css?v=1.0.9587.17207	1296000.0 s	96.6 KiB
static.cloud.coveo.com/coveo.analytics.js/2/coveoua.js	86400.0 s	21.7 KiB
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system-scoped.css	1296000.0 s	66.0 KiB
s.go-mpulse.net/boomerang/YX9U9-3CW2M-92JLU-3BLJD-T6LD5	604800.0 s	60.2 KiB
www.arm.com/Coveo/Hive/css/CoveoFullSearch.css	1296000.0 s	47.3 KiB
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system/p-46ecfede.js	1296000.0 s	43.7 KiB
www.arm.com/Coveo/Hive/js/Searchbox.min__7d400a8f34d33214ce02.js	1296000.0 s	20.0 KiB
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system/p-0b03f924.js	1296000.0 s	16.5 KiB
fast.fonts.net/cssapi/de675742-710f-4ef8-bfc7-a5c34e489bdb.css	300.0 s	1.5 KiB
/268f09c22e73/433ef363670d/e9b812a4017b/RC90fdbc3163d8442...	3600.0 s	1.5 KiB
www.arm.com/Coveo/Hive/js/CoveoForSitecore.Lazy.min.js	1296000.0 s	11.2 KiB
/268f09c22e73/433ef363670d/e9b812a4017b/RCc072b8aeb4f744a...	3600.0 s	1.4 KiB
/268f09c22e73/433ef363670d/e9b812a4017b/RCd0fa6a50481d43e...	3600.0 s	1.3 KiB
/268f09c22e73/433ef363670d/e9b812a4017b/RC1cefa15948af4cf...	3600.0 s	1.3 KiB
www.arm.com/Coveo/Hive/js/cultures/en.js	1296000.0 s	8.9 KiB
/268f09c22e73/433ef363670d/e9b812a4017b/RCeb7896e1ff414ed...	3600.0 s	1.1 KiB
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system/p-3b6552a6.js	1296000.0 s	7.6 KiB
/t/1.css?apiType=css&projectid=de675742-710f-4ef8-bfc7-a5...	1.0 s	524 B
/268f09c22e73/433ef363670d/e9b812a4017b/RC3b98530e0a73468...	3600.0 s	581 B
/268f09c22e73/433ef363670d/e9b812a4017b/RC3d8ec7f780ca478...	3600.0 s	504 B
/static/designsystem/rel/4.14.1/arm-design-system/arm-des...	1296000.0 s	3.2 KiB
www.arm.com/arm-tag-manager/arm.com/atm.js	1296000.0 s	3.0 KiB
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system/p-e8de2824.entry.js	1296000.0 s	2.2 KiB
www.arm.com/Coveo/Hive/js/CoveoForSitecoreUserContext.js	1296000.0 s	1.7 KiB
www.arm.com/Coveo/Hive/js/CoveoForSitecoreLocalExpression.min.js	1296000.0 s	949 B
www.arm.com/Coveo/Hive/js/CoveoForSitecoreExpressions.min.js	1296000.0 s	946 B
www.arm.com/Coveo/Hive/css/CoveoForSitecore.css	1296000.0 s	899 B
www.arm.com/Coveo/Hive/js/FacetsMobileMode.min__7d400a8f34d33214ce02.js	1296000.0 s	754 B
www.arm.com/Coveo/Hive/js/CoveoForSitecoreConfigureSearchHub.min.js	1296000.0 s	692 B
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system/p-350c6b70.js	1296000.0 s	681 B
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system/p-cd316f59.js	1296000.0 s	436 B
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system/p-a956cf34.js	1296000.0 s	251 B
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system/p-e9eb479a.js	1296000.0 s	154 B
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system/p-30f68cd2.js	1296000.0 s	143 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.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:35.575 source:map[type:text value:[unattributed]]]]

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG

nodeLabel: The Future of AI is Built on Arm

path: 1,HTML,1,BODY,4,DIV,4,DIV,0,DIV,3,HEADER,0,DIV,0,DIV,0,DIV,3,DIV,0,PICTURE,3,IMG

selector: div#c-dad1a524-d076-4a97-ba63-3e9cc6fc59ff > div.c-masthead-teaser-video__end-screen > picture.c-masthead-teaser-video__end-image > img

snippet: <img src="https://www.arm.com/-/media/global/homepage/heroes/branding-mobile-v1.jpg?…" alt="The Future of AI is Built on Arm">

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.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.

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.

URL	Transfer Size	Duration
cdn.cookielaw.org/scripttemplates/otSDKStub.js	0 B	780 ms
fonts.googleapis.com/css?family=Lato:200,300,400,500,600,700,800,900	552 B	172 ms
fonts.googleapis.com/css?family=Roboto:400,700	2.0 KiB	822 ms
fast.fonts.net/cssapi/de675742-710f-4ef8-bfc7-a5c34e489bdb.css	1.5 KiB	822 ms
www.arm.com/arm-tag-manager/arm.com/atm.js	3.0 KiB
/t/1.css?apiType=css&projectid=de675742-710f-4ef8-bfc7-a5...	524 B	166 ms
www.arm.com/shared/bundle/all.css?v=1.0.9587.17207	96.6 KiB	751 ms

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.

	URL	Resource Size	Est Savings
div.row > div.column > div#c-601d6150-2190-42af-87f3-073d3a4dba8d > div.c-title-image-card__background `div.row > div.column > div#c-601d6150-2190-42af-87f3-073d3a4dba8d > div.c-title-image-card__background`	/-/media/global/homepage/partners/partnerships/partner_le...	1018.4 KiB	548.0 KiB
As AI scales `div > div.c-horizontal-tabs-panel-content-promo-item--primary > div.c-horizontal-tabs-panel-content-promo-item__image > img`	/-/media/global/homepage/horizontal/as-ai-scales-600x275....	229.4 KiB	203.4 KiB
div.row > div.column > div#c-1981e96b-8f13-428f-90dd-163625227155 > div.c-title-image-card__background `div.row > div.column > div#c-1981e96b-8f13-428f-90dd-163625227155 > div.c-title-image-card__background`	/-/media/global/homepage/partners/partnerships/partner-lo...	519.8 KiB	49.4 KiB
Autonomous machines - Autonomous delivery robot and shuttle operating in a smar… `div.c-flex-grid-v2-wrapper > div#c-97d7c12e-cfec-488e-b520-05b533bffaa0 > figure.c-animated-card-figure > img`	/-/media/global/homepage/animated cards/658x466-autonomou...	60.8 KiB	10.9 KiB

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.2 s

URL	Time Spent
arm.com/	1.2 s
www.arm.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

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: 1.2 s 196.4 KiB

URL	Transfer Size	Est Savings
www.arm.com/shared/bundle/all.css?v=1.0.9587.17207	96.2 KiB	88.3 KiB
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system-scoped.css	65.7 KiB	61.5 KiB
www.arm.com/Coveo/Hive/css/CoveoFullSearch.css	47.3 KiB	46.6 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: 1.4 s 257.7 KiB

URL	Transfer Size	Est Savings
www.arm.com/Coveo/Hive/js/CoveoJsSearch.Lazy.min.js	190.0 KiB	97.2 KiB
assets.adobedtm.com/launch-EN10e66088202b43a3b7f30a6ded39776d.min.js	184.0 KiB	67.3 KiB
www.arm.com/shared/bundle/all.js?v=1.0.9587.17207	100.5 KiB	66.6 KiB
s.go-mpulse.net/boomerang/YX9U9-3CW2M-92JLU-3BLJD-T6LD5	60.0 KiB	26.6 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.

URL	Total CPU Time	Script Evaluation	Script Parse
www.arm.com/	1.5 s	51 ms	15 ms
Unattributable	1.1 s	22 ms	0.0 ms
assets.adobedtm.com/launch-EN10e66088202b43a3b7f30a6ded39776d.min.js	482 ms	378 ms	73 ms
www.arm.com/shared/bundle/all.js?v=1.0.9587.17207	393 ms	204 ms	27 ms
www.arm.com/Coveo/Hive/js/CoveoJsSearch.Lazy.min.js	213 ms	148 ms	64 ms
s.go-mpulse.net/boomerang/YX9U9-3CW2M-92JLU-3BLJD-T6LD5	171 ms	45 ms	14 ms
www.arm.com/static/designsystem/rel/4.14.1/arm-design-system/p-3b6552a6.js	163 ms	138 ms	0.1 ms
www.arm.com/Coveo/Hive/js/CoveoForSitecore.Lazy.min.js	82 ms	74 ms	6.0 ms
www.arm.com/Coveo/Hive/js/Searchbox.min__7d400a8f34d33214ce02.js	70 ms	32 ms	6.4 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.

Category	Time Spent
Other	1.8 s
Script Evaluation	1.4 s
Style & Layout	749 ms
Script Parsing & Compilation	242 ms
Rendering	206 ms
Parse HTML & CSS	193 ms
Garbage Collection	16 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 reason	Failure type
Pages with cache-control:no-store header cannot enter back/forward cache.	Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.	Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.	Not actionable

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 4.3 KiB

URL	Transfer Size	Est Savings
www.arm.com/Coveo/Hive/css/CoveoFullSearch.css	47.3 KiB	4.3 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.

URL	Transfer Size
/-/media/global/brand-samples/brand arc animation loop.mp...	3.3 MiB
/-/media/global/homepage/partners/partnerships/partner_le...	1018.5 KiB
/-/media/global/brand-samples/brand arc animation loop 37...	841.5 KiB
/-/media/global/brand-samples/arm-story-overlay.png?rev=a...	633.8 KiB
/-/media/global/homepage/partners/partnerships/partner-lo...	519.8 KiB
/assets/fonts/fontawesome-pro-6.5.2-web/webfonts/fa-regul...	411.8 KiB
/assets/fonts/fontawesome-pro-6.5.2-web/webfonts/fa-solid...	342.7 KiB
/-/media/global/homepage/partners/partnerships/partner-lo...	285.9 KiB
/-/media/global/homepage/horizontal/as-ai-scales-600x275....	229.4 KiB
/-/media/global/homepage/partners/partnerships/simprints-...	217.2 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
As AI scales `div > div.c-horizontal-tabs-panel-content-promo-item--primary > div.c-horizontal-tabs-panel-content-promo-item__image > img`	/-/media/global/homepage/horizontal/as-ai-scales-600x275....
Cloud AI icon `li > div.c-horizontal-tabs-panelNav-tab > div > img`	/-/media/global/homepage/horizontal/cloud-ai-icon-infra-8...
Edge AI icon `li > div.c-horizontal-tabs-panelNav-tab > div > img`	/-/media/global/homepage/horizontal/edge-ai-icon-800x800p...
Physical ai icon `li > div.c-horizontal-tabs-panelNav-tab > div > img`	/-/media/global/homepage/horizontal/physical-ai-icon-800x...
Modern cloud data center with rows of illuminated server racks. `div.c-flex-grid-v2-wrapper > div#c-f133f48c-1c30-46eb-8feb-49c8217da758 > figure.c-animated-card-figure > img`	/-/media/global/homepage/animated cards/658x466-cloud-dat...
Autonomous machines - Autonomous delivery robot and shuttle operating in a smar… `div.c-flex-grid-v2-wrapper > div#c-97d7c12e-cfec-488e-b520-05b533bffaa0 > figure.c-animated-card-figure > img`	/-/media/global/homepage/animated cards/658x466-autonomou...
Mobile and PC - Person using a smartphone while working on a laptop. `div.c-flex-grid-v2-wrapper > div#c-6a860b50-b819-4bcd-9aa9-3215c1d3932d > figure.c-animated-card-figure > img`	/-/media/global/homepage/animated cards/658x466-mobile-pc...

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

●Layout shift culprits

●Optimize DOM size

●Font display

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify JavaScript

●User Timing marks and measures 160 user timings

●Avoid long main-thread tasks 10 long tasks found

●Avoid non-composited animations 2 animated elements found

●Network Requests

●Network Round Trip Times 130 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 30 ms

○INP breakdown

○Avoid large layout shifts

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 `div.c-top-navigation-flex > ul.c-top-navigation-tabs > li.c-top-navigation-tab > div.submenu`
ARM ACCOUNT Arm Account Log in to access your Arm Account. Login Need an Arm I… `div.c-top-navigation-flex > ul.c-top-navigation-tabs > li.c-top-navigation-tab > div.submenu`
Products Markets Partners Developers Support & Training Company `div.c-top-navigation-flex > ul.c-top-navigation-tabs > li.c-top-navigation-bar > div.submenu`

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.

Names and labels

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.c-top-navigation-flex > ul.c-top-navigation-tabs > li.c-top-navigation-bar > a.c-top-navigation-tab-link `div.c-top-navigation-flex > ul.c-top-navigation-tabs > li.c-top-navigation-bar > a.c-top-navigation-tab-link`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Build CPUs for AI-driven cloud workloads Run AI and cloud workloads effic… `div#tns1-iw > div#tns1 > div#tns1-item0 > a.c-carousel-card`
A new CPU for the age of AI Explore how the Arm AGI CPU supports next-gen… `div#tns1-iw > div#tns1 > div#tns1-item1 > a.c-carousel-card`

○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

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●Form elements have associated labels

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●`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

●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"]`

●Identical links have the same purpose.

○`[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

○Links are distinguishable without relying on color.

○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.

○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.

100

Best Practices

General

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

SEO

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

Content Best Practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destination	Link Text
www.arm.com/markets/healthcare-ai	Learn more
www.arm.com/company/arm-and-aston-martin-racing/innovation-pit-stop	Learn more
www.arm.com/markets/consumer-technologies/wearables	Learn more
www.arm.com/products/cloud-datacenter	Learn more
www.arm.com/products/autonomous-machines	Learn more
www.arm.com/products/mobile-pc	Learn more
www.arm.com/products/wearables-smart-home-embedded	Learn more

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

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
Products `div.c-top-navigation-flex > ul.c-top-navigation-sections > li.c-top-navigation-section > a.c-top-navigation-section-link`
Markets `div.c-top-navigation-flex > ul.c-top-navigation-sections > li.c-top-navigation-section > a.c-top-navigation-section-link`
Partners `div.c-top-navigation-flex > ul.c-top-navigation-sections > li.c-top-navigation-section > a.c-top-navigation-section-link`
Developers `div.c-top-navigation-flex > ul.c-top-navigation-sections > li.c-top-navigation-section > a.c-top-navigation-section-link`
Support & Training `div.c-top-navigation-flex > ul.c-top-navigation-sections > li.c-top-navigation-section > a.c-top-navigation-section-link`
Company `div.c-top-navigation-flex > ul.c-top-navigation-sections > li.c-top-navigation-section > a.c-top-navigation-section-link`

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

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`