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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.

97

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
/signals/config/1382453083617465?v=2.9.303&r=stable&domai...1200.0 s125.2 KiB
www.casino.org/assets/app/_next/static/chunks/890-4c9bef17ac917abc.js14400.0 s159.1 KiB
/assets/app/_next/static/chunks/app/[[...slug]]/page-b943...14400.0 s131.7 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
www.casino.org/custom-data.js3600.0 s80.7 KiB
www.casino.org/assets/app/_next/static/chunks/898-edf79f3eae95a29a.js14400.0 s62.1 KiB
www.casino.org/assets/app/_next/static/chunks/1117-36b6b1c4f88d0a08.js14400.0 s54.6 KiB
www.casino.org/assets/app/_next/static/chunks/f599905f-aa2baebd6927070f.js14400.0 s53.9 KiB
www.casino.org/assets/app/_next/static/chunks/3398e177-70e31e01f958b64d.js14400.0 s49.1 KiB
www.casino.org/assets/app/_next/static/css/b2a3297b4b7dff90.css14400.0 s42.8 KiB
www.casino.org/assets/app/_next/static/chunks/7796-d57fcd6f4c144af9.js14400.0 s27.6 KiB
www.casino.org/assets/app/_next/static/chunks/7215-a52ca809452a2d31.js14400.0 s19.8 KiB
www.casino.org/assets/app/_next/static/chunks/9987-3285fe140acdc98a.js14400.0 s19.1 KiB
www.casino.org/assets/app/_next/static/chunks/1723.f46d58c231e22f98.js14400.0 s16.0 KiB
www.casino.org/assets/app/_next/static/chunks/6921-0751497d5e4837fd.js14400.0 s15.1 KiB
cdn.speedcurve.com/js/lux.js?id=46406226093600.0 s12.7 KiB
www.casino.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?14400.0 s13.0 KiB
www.casino.org/assets/app/_next/static/chunks/63.78dcb3ac042d7499.js14400.0 s12.2 KiB
www.casino.org/assets/app/_next/static/chunks/9907-3a3b60bb2963afa2.js14400.0 s11.9 KiB
www.casino.org/assets/app/_next/static/chunks/6248-c23868baa2d40277.js14400.0 s11.3 KiB
www.casino.org/assets/app/_next/static/chunks/7993-356ba2fa14cb0ad0.js14400.0 s11.1 KiB
static.hotjar.com/c/hotjar-22214.js?sv=660.0 s7.3 KiB
www.casino.org/assets/app/_next/static/chunks/2679-d6cbe7b19dd0428f.js14400.0 s10.5 KiB
www.casino.org/assets/app/_next/static/chunks/1314-4abc7e8c5f3fac6a.js14400.0 s10.3 KiB
www.casino.org/assets/app/_next/static/chunks/1928-56411ecf19e93073.js14400.0 s8.2 KiB
/titanium/s.js?z=JTdCJTIyZXhlY3V0ZWQlMjIlM0ElNUIlNUQlMkMl...0.0 ms4.4 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...86400.0 s10.7 KiB
www.everestjs.net/static/le/last-event-tag-latest.min.js0.0 ms4.2 KiB
www.casino.org/assets/app/_next/static/chunks/3635-658c9bb2b8ce3af4.js14400.0 s6.1 KiB
www.casino.org/assets/app/_next/static/chunks/webpack-a04b8436a06396dd.js14400.0 s5.6 KiB
www.casino.org/assets/app/_next/static/chunks/app/error-d2d938fe7841c50a.js14400.0 s5.4 KiB
www.casino.org/assets/app/_next/static/chunks/6358-c331a7dd49ccda36.js14400.0 s5.3 KiB
www.casino.org/__ssobj/core.js+ssdomvar.js+generic-adapter.js86400.0 s7.2 KiB
www.casino.org/assets/app/_next/static/css/7b716301d6bcf095.css14400.0 s2.7 KiB
www.casino.org/titanium/i.js0.0 ms1.5 KiB
www.casino.org/assets/app/_next/static/chunks/4282.810fd0a225112520.js14400.0 s2.1 KiB
www.casino.org/assets/app/_next/static/chunks/main-app-9fbcb9e79039daab.js14400.0 s2.1 KiB
www.casino.org/assets/app/_next/static/media/logo-casino-org.be1e3273.svg14400.0 s2.1 KiB
/assets/app/_next/static/chunks/app/global-error-6b38fe21...14400.0 s1.8 KiB
rules.quantcount.com/rules-p-cGPZ6Upe5jhNp.js3600.0 s1.4 KiB
www.casino.org/assets/app/_next/static/chunks/2208.cc9278e8cf27e66b.js14400.0 s1.2 KiB
www.casino.org/common-scripts/ad-blocker-detection.js14400.0 s1.1 KiB
/1d8526a1ddc2/cff7fdda0680/d791912628d5/RCaf84eaffc6944f8...3600.0 s957 B
sa.casino.org/js604800.0 s5.3 KiB
/1d8526a1ddc2/cff7fdda0680/d791912628d5/RCdede6bba6f644b8...3600.0 s632 B
/1d8526a1ddc2/cff7fdda0680/d791912628d5/RCeb91a3c9025344d...3600.0 s596 B
/1d8526a1ddc2/cff7fdda0680/d791912628d5/RCa3ee30041d7d45a...3600.0 s564 B
/tr/?id=1382453083617465&ev=PageView&dl=https%3A%2F%2Fwww...0.0 ms19 B
www.casino.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?14400.0 s0 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.

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
div.flex > div.flex > div.hidden > img.absolute div.flex > div.flex > div.hidden > img.absolute
games.casino.org/assets/66f5ca411ad743e96f6f9edf08e98d5c?encode=webp1.3 MiB1.3 MiB
Michael Owen joins Casino.org “As gambling continues to grow in the UK, it was… main#main-content > div.w-full > div.md:max-w-md > div.p-2-5
www.casino.org/images/media-banner/media-banner-desktop-bg.avif137.4 KiB63.4 KiB
Jelly Express - Special div.hidden > div.flex > div.max-h-[194px] > img.max-h-[194px]
games.casino.org/assets/97c6e13170dfaa9617c2e418d4b23b2e?encode=webp29.1 KiB24.7 KiB
Jelly Express div.hidden > div.relative > div.shrink-0 > img.h-[215px]
/_next/image/?url=https%3A%2F%2Fgames.casino.org%2Fassets...30.2 KiB23.6 KiB
Michael Owen Photo div.flex > div.w-full > div.!h-full > img.w-full
/ctf-img/vpd5gtrb1dbp/1oMggnGnVs7RfiEWwMz0yO/b85778f8c054...31.1 KiB17.2 KiB
Mega Fire Blaze: Roulette div.md:gap-section-lg > div.relative > div.relative > img.w-full
/assets/a92e5e685eaefd5bcd1ddccf1212f962?resize=256,192&e...12.5 KiB4.5 KiB
Casino777 div.tl-partner-logo-wrapper > div.tl-partner-logo-container > div.relative > img.max-h-full
/partner-images/EUu/VYJl3-KrUTAt4ZleIBlq0Z7sidZ7ZQU3GpYPn...10.1 KiB4.4 KiB
Penny Roulette div.md:gap-section-lg > div.relative > div.relative > img.w-full
/assets/a126e5f88da8c53dbbcec3332ca07d2c?resize=256,192&e...12.1 KiB4.1 KiB

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 249 ms
URLTime Spent
casino.org/249 ms
www.casino.org/0.0 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

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: 40 ms 33.2 KiB
URLTransfer SizeEst Savings
www.casino.org/assets/app/_next/static/css/b2a3297b4b7dff90.css42.4 KiB33.2 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.

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
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

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

Max Potential First Input Delay 80 ms
Layout shift culprits
Optimize DOM size
Font display
Forced reflow
LCP breakdown
Modern HTTP
Render blocking requests
Optimize viewport for mobile
Minify CSS
Minify JavaScript
User Timing marks and measures 1 user timing
JavaScript execution time 0.6 s
Minimizes main-thread work 1.4 s
Avoid long main-thread tasks 3 long tasks found
Avoid non-composited animations 1 animated element found
Image elements have explicit `width` and `height`
Network Requests
Network Round Trip Times 30 ms
Server Backend Latencies 150 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 20 ms
Avoid large layout shifts 1 layout shift found
INP breakdown
LCP request discovery
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

ARIA roles must have valid values in order to perform their intended accessibility functions. Learn more about valid ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item
div.mx-0 > div.mx-auto > div.h-[62px] > div.item div.mx-0 > div.mx-auto > div.h-[62px] > div.item

When an input field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn more about input field labels.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Select Country div.justify-between > div.md:w-64 > div.relative > div

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.

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
1m+ ul.flex > li.md:flex-[1_1_calc(25%-24px)] > div.h-full > span.styled-anchors
100+ ul.flex > li.md:flex-[1_1_calc(25%-24px)] > div.h-full > span.styled-anchors
$37m+ ul.flex > li.md:flex-[1_1_calc(25%-24px)] > div.h-full > span.styled-anchors
4.4 ul.flex > li.md:flex-[1_1_calc(25%-24px)] > div.h-full > span.styled-anchors

These are opportunities to improve the legibility of your content.

Tables and lists

When definition lists are not properly marked up, screen readers may produce confusing or inaccurate output. Learn how to structure definition lists correctly.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Helping players for 30 years With three decades of experience, we’ve perfected … div.relative > div.flex > div.shrink-0 > dl.flex
Real expert writers The Casino.org writing team boasts experienced content edit… div.relative > div.flex > div.shrink-0 > dl.flex
Rigorous 25-step review process Don’t just take our word for it. Our methodical… div.relative > div.flex > div.shrink-0 > dl.flex
Stay informed with first-rate features Boost your skills and knowledge with inf… div.relative > div.flex > div.shrink-0 > dl.flex
We’re committed to responsible gambling We provide the information and support … div.relative > div.flex > div.shrink-0 > dl.flex

Definition list items (`<dt>` and `<dd>`) must be wrapped in a parent `<dl>` element to ensure that screen readers can properly announce them. Learn how to structure definition lists correctly.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
With three decades of experience, we’ve perfected our processes and built a rep… dl.flex > div.flex > div > dd.styled-anchors
The Casino.org writing team boasts experienced content editors, published autho… dl.flex > div.flex > div > dd.styled-anchors
Don’t just take our word for it. Our methodical, data-driven rating approach co… dl.flex > div.flex > div > dd.styled-anchors
Boost your skills and knowledge with infographics, tools, long-form articles, a… dl.flex > div.flex > div > dd.styled-anchors
We provide the information and support you need to stay in control. Find helpfu… dl.flex > div.flex > div > dd.styled-anchors

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
Unclear terms and conditions Winnings unpaid for over 3 months Misleading licen… div.relative > div.rounded-md > div.py-4 > ul.flex

These are opportunities to improve the experience of reading tabular or list data using 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
See what sets us apart div.shrink-0 > dl.flex > div.flex > a.link
Get to know our writers div.shrink-0 > dl.flex > div.flex > a.link
Discover our methodology div.shrink-0 > dl.flex > div.flex > a.link
Casinos online Argentina nav > ul.grid > li.flex > a.link
Online casinos Canada nav > ul.grid > li.flex > a.link
Casinos en ligne Canada nav > ul.grid > li.flex > a.link
Casinos online en Chile nav > ul.grid > li.flex > a.link
Online casinos Deutschland nav > ul.grid > li.flex > a.link
Casinos online en España nav > ul.grid > li.flex > a.link
Online casinos India nav > ul.grid > li.flex > a.link
Online casino Luxemburg nav > ul.grid > li.flex > a.link
NZ online casinos nav > ul.grid > li.flex > a.link
Online casinos Österreich nav > ul.grid > li.flex > a.link
Casinos online em Portugal nav > ul.grid > li.flex > a.link
Online casino South Africa nav > ul.grid > li.flex > a.link
Best online casinos UK nav > ul.grid > li.flex > a.link
Online casinos USA nav > ul.grid > li.flex > a.link
Casinos en línea en EE. UU. nav > ul.grid > li.flex > a.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
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
`[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 are distinguishable without relying on color.
Links have a discernible name
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
Uses ARIA roles only on compatible elements
Identical links have the same purpose.
`[accesskey]` values are unique
`button`, `link`, and `menuitem` elements have accessible names
Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
ARIA `meter` elements have accessible names
ARIA `progressbar` elements have accessible names
Elements with the `role=text` attribute do not have focusable descendents.
ARIA toggle fields have accessible names
ARIA `tooltip` elements have accessible names
ARIA `treeitem` elements have accessible names
The page contains a heading, skip link, or landmark region
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
`<video>` elements contain a `<track>` element with `[kind="captions"]`
Tables have different content in the summary attribute and `<caption>`.
All heading elements contain content.
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.
73

Best Practices

User Experience

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLAspect Ratio (Displayed)Aspect Ratio (Actual)
Jelly Express div.relative > div.flex > div.flex > img.h-[132px]
/_next/image/?url=https%3A%2F%2Fgames.casino.org%2Fassets...380 x 280 (1.36)480 x 360 (1.33)
Jelly Express div.hidden > div.relative > div.flex > img.h-[243px]
/_next/image/?url=https%3A%2F%2Fgames.casino.org%2Fassets...380 x 280 (1.36)480 x 360 (1.33)
Jelly Express div.hidden > div.relative > div.flex > img.h-[310px]
/_next/image/?url=https%3A%2F%2Fgames.casino.org%2Fassets...380 x 280 (1.36)480 x 360 (1.33)
Jelly Express div.hidden > div.relative > div.shrink-0 > img.h-[215px]
/_next/image/?url=https%3A%2F%2Fgames.casino.org%2Fassets...215 x 188 (1.14)480 x 360 (1.33)

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
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
Fledge
AttributionReporting

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
Failed to load resource: the server responded with a status of 403 ()
Failed to load resource: the server responded with a status of 404 ()

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 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
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
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
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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`

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