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
cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js	86400.0 s	104.5 KiB
cdn.cookielaw.org/scripttemplates/otSDKStub.js	86400.0 s	9.1 KiB
accounts.supercell.com/sdk/sdk.js	1800.0 s	2.9 KiB

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:61.306 source:map[type:text value:[unattributed]]]]

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
	supercell.com/images/61b5640f837e6c83a51a7b6bc7c8b2ae/790/DSC04714.webp	194.0 KiB	142.4 KiB
Crazy Raccoon crowned champions at the Brawl Stars World Finals 2025 `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/4a0cdf1068282d0125c18813b7fb1f60/790/20251130_Ada...	174.1 KiB	122.4 KiB
Heroes and Squaddies Arrive in Squad Busters `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/6b860e6814faf09dd55ee4c4551f19ba/790/SB_SocialBan...	160.0 KiB	108.4 KiB
Brawl Stars’ Starr Park Turns Upside Down in Stranger Things Crossover `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/b28cd5cc8b8039a8f1a18111f4a7d76e/790/FINAL_-_1026...	140.6 KiB	89.0 KiB
Sonic the Hedgehog Enters the Squad Busters Universe `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/67891ac7c9dd6c3879db07366c7e377d/790/FINAL_keyart...	138.1 KiB	86.5 KiB
Frontpage Hero Mobile `main#main > div.HeroImage_heroContainer__ou_zO > picture > img.HeroImage_heroImage___Kx_A`	supercell.com/_next/static/media/frontpage_hero_mobile.4d86fbbf.webp	71.4 KiB	52.3 KiB
What We’ve Learned from Failures `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/1885de2a28dc176e143693130aeeb0eb/790/failosophy-w...	103.7 KiB	52.1 KiB
Boom Beach Is Playable on PC… Now! `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/8bb77883320f0956fcc5e2b0aa91e2ad/790/Boom_Beach_P...	99.6 KiB	48.0 KiB
Brawl Stars x Subway Surfers Has Arrived! `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/8aecb6a563472e69d488e04d0aead3d8/790/BS_SUBWAY_SU...	96.3 KiB	44.7 KiB
Squad Busters Development is Ending, Final Update in December 2025 `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/f78b607faf3e016e1c7c0edc5ecb6b3b/790/Squad_news_-...	91.3 KiB	39.7 KiB
Grow Together With Hay Day’s Neighborhood Event Featuring Lance Bass `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/ad5a77db0d6e3cabc68fb0d2fca9eed6/790/Hay-Day_Neig...	88.3 KiB	36.7 KiB
The Best Games Haven't Been Made Yet `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/a3ac74eb27c3da587c9576bb2a771d21/790/ilkkasBlogPo...	70.4 KiB	22.9 KiB
Inferno Dragon Is Finally Getting His Evolution In Clash Royale `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/d95ad7b6b85213ac130a28e64b2ba2e9/790/Inferno_Drag...	67.0 KiB	21.8 KiB
Clash Royale Partners With bbno$ For Baby Dragon Evolution Launch `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/fd6b1143b7fed93dbc8ce1dfd63abb06/790/CR_KeyArt_Ba...	62.5 KiB	20.3 KiB
Welcoming Drussila Hollanda as our new Head of New Games `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	/images/42ee960724af6b9c9b7d82209aec399b/790/drussila-thu...	59.5 KiB	19.4 KiB
Stay Safe: Spotting Fake Supercell Store Websites `div.Grid_full-8__23bPT > a > picture > img.articleGridList_thumbnail__LoEPl`	supercell.com/images/61ffc9f559811af6d9a53b2d1bc7b6ad/790/IMG_8025.webp	37.4 KiB	12.2 KiB

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-4-IMG

nodeLabel: Frontpage Hero Mobile

path: 1,HTML,1,BODY,0,DIV,2,MAIN,0,DIV,0,PICTURE,1,IMG

selector: main#main > div.HeroImage_heroContainer__ou_zO > picture > img.HeroImage_heroImage___Kx_A

snippet: <img width="1440" height="1972" src="https://supercell.com/_next/static/media/frontpage_hero_mobile.4d86fbbf.we…" alt="Frontpage Hero Mobile" class="HeroImage_heroImage___Kx_A HeroImage_mobile__nJ35c HeroImage_tablet__Imygs">

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Protocol
supercell.com/	http/1.1

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

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: 1.2 s 304.8 KiB

URL	Transfer Size	Est Savings
supercell.com/_next/static/chunks/main-af617b05f1660d1b.js	322.1 KiB	181.0 KiB
cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js	104.3 KiB	66.4 KiB
supercell.com/_next/static/chunks/805-82b11073755d6082.js	89.8 KiB	57.3 KiB

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 17.0 KiB

URL	Transfer Size	Est Savings
#onetrust-banner-sdk{-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%} …	17.1 KiB	17.0 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
supercell.com/_next/static/chunks/main-af617b05f1660d1b.js	322.5 KiB
supercell.com/images/61b5640f837e6c83a51a7b6bc7c8b2ae/790/DSC04714.webp	194.4 KiB
/images/4a0cdf1068282d0125c18813b7fb1f60/790/20251130_Ada...	174.5 KiB
supercell.com/_next/static/media/supercelltext_w_md.01ac8b8d.woff2	165.7 KiB
supercell.com/_next/static/media/miniPekka.7e91c758.webp	164.4 KiB
supercell.com/_next/static/media/supercelltext_w_rg.2d4de3c7.woff2	161.4 KiB
supercell.com/_next/static/media/supercelltext_w_bd.8c3b5392.woff2	160.5 KiB
/images/6b860e6814faf09dd55ee4c4551f19ba/790/SB_SocialBan...	160.4 KiB
/images/b28cd5cc8b8039a8f1a18111f4a7d76e/790/FINAL_-_1026...	141.0 KiB
/images/67891ac7c9dd6c3879db07366c7e377d/790/FINAL_keyart...	138.5 KiB

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

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●LCP breakdown

●Network dependency tree

●Render blocking requests

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●User Timing marks and measures 10 user timings

●JavaScript execution time 1.0 s

●Minimizes main-thread work 1.9 s

●Avoid long main-thread tasks 6 long tasks found

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 20 ms

●Server Backend Latencies 40 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 20 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○Avoid non-composited animations

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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
WATCH VIDEO `main#main > div.HeroImage_heroContainer__ou_zO > div.HeroImage_heroText__upo5U > button.frontPage_bluePill__2Rujc`
BOOM BEACH `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
ILKKA’S LONG TEXTS `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
CAREERS `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
HAY DAY `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
GOOD STUFF `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
BRAWL STARS `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
CLASH ROYALE `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
SQUAD BUSTERS `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
BRAWL STARS `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
CLASH ROYALE `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
BRAWL STARS `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
PEOPLE `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
MO.CO `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
NEWS `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
SQUAD BUSTERS `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
CLASH ROYALE `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
ENTERTAINMENT & PARTNERSHIPS `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
SQUAD BUSTERS `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
GOOD STUFF `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
CLASH OF CLANS `div#news > div.Grid_rowContainer__RAVMO > div.Grid_full-8__23bPT > p.articleGridList_description__YYAgr`
NEWS ARCHIVE `div#news > div.Grid_rowContainer__RAVMO > div.articleGridList_bottomButton__URJ3m > a`
Join us to create games that excite and help our players around the world make … `div.frontPage_characterTextRow__xm1Dx > div.Grid_rowContainer__RAVMO > div.frontPage_textContainer__MxJRr > p.frontPage_text__cbTdy`

These are opportunities to improve the legibility of your content.

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
GAMES `div.frontPage_characterTextRow__xm1Dx > div.Grid_rowContainer__RAVMO > div.frontPage_textContainer__MxJRr > h3.frontPage_heading__1K_oF`

These are opportunities to improve keyboard navigation in your application.

○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.

●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

●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

●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.

●Skip links are focusable.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with 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

○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.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○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.

Best Practices

User Experience

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Displayed size	Actual size	Expected size
div.Header_menuButtonContainer__DYEYK > button#mobileMenuIcon > picture > img `div.Header_menuButtonContainer__DYEYK > button#mobileMenuIcon > picture > img`	supercell.com/_next/static/media/btn_mobile_menu.4597c82b.webp	100 x 200	100 x 200	150 x 300

General

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.

Source	Description
supercell.com/en/	`Access to fetch at 'https://cdn.cookielaw.org/scripttemplates/202401.2.0/assets/otFlat.json' from origin 'https://supercell.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.`
cdn.cookielaw.org/scripttemplates/202401.2.0/assets/otFlat.json	`Failed to load resource: net::ERR_FAILED`
cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js line 6, col 234606	TypeError: Cannot read properties of undefined (reading 'html') at Yn.insertAlertHtml (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:234607) at s.initializeAlartHtmlAndHandler (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:288833) at ii.<anonymous> (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:423335) at Object.next (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:1920) at https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:966 at new Promise (<anonymous>) at F (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:717) at ii.windowLoadBanner (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:422542) at HTMLHtmlElement.r (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:70144) at HTMLHtmlElement.n (https://supercell.com/_next/static/chunks/main-af617b05f1660d1b.js:103:65098) at i.trigger (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:70291) at ro.loadBanner (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:133986) at sr.LoadBanner (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:310544) at https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:439084 at Object.next (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:1920) at n (https://cdn.cookielaw.org/scripttemplates/202401.2.0/otBannerSdk.js:7:771)

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.

URL
supercell.com/_next/static/chunks/main-af617b05f1660d1b.js

●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

●Page has the HTML doctype

●Properly defines charset

●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 clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

100

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.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`