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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.

72

Performance

Insights

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.680023] map[node:map[boundingRect:map[bottom:6221 height:5441 left:0 right:1350 top:780 width:1350] lhId:page-7-MAIN nodeLabel:© Shutterstock/Wavebreak Media Give an Hour for Earth Day Do something good f… path:1,HTML,1,BODY,5,MAIN selector:body.template-home-page > main#main-content snippet:<main id="main-content"> type:node] score:0.468241] map[node:map[boundingRect:map[bottom:647 height:599 left:48 right:675 top:48 width:627] lhId:page-8-DIV nodeLabel:Our beautiful planet needs you Make Earth Day (April 22) more than a moment—ma… path:1,HTML,1,BODY,3,SECTION,2,DIV selector:body.template-home-page > section.pushdown__section > div.banner__item snippet:<div class="banner__item pushdown__content"> type:node] score:0.211242] map[node:map[boundingRect:map[bottom:762 height:50 left:165 right:1270 top:712 width:1105] lhId:page-1-DIV nodeLabel:Our work Get involved About us Gifts Donate path:1,HTML,1,BODY,4,DIV,1,HEADER,0,DIV,0,NAV,1,DIV,0,DIV selector:div.container > nav.lg:grid-full > div.lg:col-start-2 > div.flex snippet:<div class="flex justify-between items-center gap-4 xl:gap-grid-gutter w-full"> type:node] score:0.000487] map[node:map[boundingRect:map[bottom:1471 height:21 left:1050 right:1270 top:1450 width:220] lhId:page-2-P nodeLabel:© Shutterstock/Wavebreak Media path:1,HTML,1,BODY,5,MAIN,0,DIV,0,HEADER,0,FIGURE,1,DIV,0,DIV,0,DIV,0,P selector:div.container > div.grid > div.mt-2xs > p.z-1 snippet:<p data-testid="hero-credit" class=" z-1 relative text-caption-size theme-dark:text-foreground-colored-muted t…"> type:node] score:5.3e-05 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://www.worldwildlife.org/static/fonts/OpenSans-VariableFont.65c46fe9fcc0.woff2]]] type:subitems]]]

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

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
cdn.cookielaw.org/scripttemplates/otSDKStub.js0 B230 ms
www.worldwildlife.org/static/css/main.eba748cdc84a.css31.9 KiB146 ms
assets.worldwildlife.org/www-prd/misc/OneTrust/OtAutoBlock.js4.5 KiB229 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.

URLResource SizeEst Savings
A gillnet partially pulled out of the ocean a.grid > div.row-start-1 > div.rounded-sm > img.rounded-sm
/www-prd/images/wwfcmsprodimagesGilln.2e16d0ba.fill-400x3...42.5 KiB30.2 KiB
Three month snow leopard cub (captive) looks directly into camera. body.template-home-page > section.pushdown__section > div.pushdown__img > img.w-full
assets.worldwildlife.org/www-prd/images/_WW2155076.width-800.format-webp.webp81.8 KiB27.8 KiB
Two smiling women stand next to each other on the muddy bank of a wide river a.grid > div.row-start-1 > div.rounded-sm > img.rounded-sm
/www-prd/images/_Bella_Roscher___WWF-.2e16d0ba.fill-400x3...35.0 KiB22.8 KiB
A plowed field with rich brown dirt a.grid > div.row-start-1 > div.rounded-sm > img.rounded-sm
/www-prd/images/farm-plowed-WWspring2.2e16d0ba.fill-400x3...22.7 KiB10.5 KiB
A close-up of a wild blue-and-yellow macaw in the llanos of Colombia. div.grid > div.order-1 > div.aspect-4/3 > img.rounded-t-sm
/www-prd/images/Medium_WW239231.2e16d0ba.fill-672x504.for...35.4 KiB9.1 KiB

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

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: 0.0 ms 130.3 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtm.js?id=GTM-PTTJ3C2M176.6 KiB85.5 KiB
www.worldwildlife.org/static/js/main.08aab79dcfc6.js52.3 KiB44.8 KiB

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

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: 265 ms
URLTime Spent
worldwildlife.org/265 ms
www.worldwildlife.org/0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
© Shutterstock/Wavebreak Media Give an Hour for Earth Day Do something good f… body.template-home-page > main#main-content
0.468
Our beautiful planet needs you Make Earth Day (April 22) more than a moment—ma… body.template-home-page > section.pushdown__section > div.banner__item
0.211
Our work Get involved About us Gifts Donate div.container > nav.lg:grid-full > div.lg:col-start-2 > div.flex
0.000
© Shutterstock/Wavebreak Media div.container > div.grid > div.mt-2xs > p.z-1
0.000
●Time to Interactive 1.4 s
●Use efficient cache lifetimes
●Optimize DOM size
●Font display
●Forced reflow
●LCP breakdown
●LCP request discovery
●Modern HTTP
●Optimize viewport for mobile
●Max Potential First Input Delay 30 ms
●Minify CSS
●Minify JavaScript
●Reduce unused CSS
●Avoids enormous network payloads Total size was 917 KiB
●JavaScript execution time 0.1 s
●Minimizes main-thread work 0.3 s
●Avoid non-composited animations 4 animated elements 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 20 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 50 ms
○INP breakdown
○User Timing marks and measures
○Avoid long main-thread tasks
99

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.

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
Nature needs us now div.container > div.grid > div.order-2 > h4.text-h4

These are opportunities to improve keyboard navigation in your application.

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
© Bella Roscher _ WWF-CH Feature In Madagascar, women’s solar training bright… div.grid-full > div.grid-centered-12 > div.grid > a.grid
© WWF-US/Ashleigh Coleman Magazine Food’s next frontier Can the mid-Mississi… div.grid-full > div.grid-centered-12 > div.grid > a.grid
© Chris Johnson Story Gillnets are death traps for dolphins Here are 3 solut… div.grid-full > div.grid-centered-12 > div.grid > a.grid
○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
●Input buttons have discernible text.
●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.
●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 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
●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 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 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.
○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.
○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.
92

Best Practices

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.

SourceDescription
www.worldwildlife.org/site.webmanifest
Failed to load resource: the server responded with a status of 403 ()
www.worldwildlife.org/site.webmanifest
Failed to load resource: the server responded with a status of 403 ()
www.worldwildlife.org/
Manifest fetch from https://www.worldwildlife.org/site.webmanifest failed, code 403
www.worldwildlife.org/
Manifest fetch from https://www.worldwildlife.org/site.webmanifest failed, code 403

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
Content security policy
●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
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Mitigate DOM-based XSS with Trusted Types
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Ensure proper origin isolation with COOP
○Mitigate clickjacking with XFO or CSP
○Detected JavaScript libraries
92

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

hreflang links tell search engines what version of a page they should list in search results for a given language or region. Learn more about `hreflang`.

Why this matters

Performance issues directly impact user engagement and conversion rates.
head > link
head > link

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

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●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 `rel=canonical`

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