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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

44

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
assets.edfcdn.org/assets/global/dist/js/utilities.min.js?v=20260422073600.0 s85.3 KiB
cdn.fundraiseup.com/widget/AQBHBSYR0.0 ms65.5 KiB
scripts.clarity.ms/0.8.59/clarity.js0.0 ms26.1 KiB
/sites/default/files/styles/2_1_1400_700_focal_point/publ...1209600.0 s245.7 KiB
/sites/default/files/styles/3_2_1400x933_focal_point/publ...1209600.0 s237.9 KiB
www.edf.org/themes/edf/css/standalone-css/overlays.css300.0 s16.6 KiB
/sites/default/files/styles/3_2_1400x933_focal_point/publ...1209600.0 s153.7 KiB
/sites/default/files/styles/3_2_1400x933_focal_point/publ...1209600.0 s139.2 KiB
/sites/default/files/styles/3_2_1400x933_focal_point/publ...1209600.0 s130.6 KiB
/sites/default/files/styles/2_1_1400_700_focal_point/publ...1209600.0 s128.1 KiB
/sites/default/files/styles/2_1_1400_700_focal_point/publ...1209600.0 s127.6 KiB
/sites/default/files/styles/2_1_1400_700_focal_point/publ...1209600.0 s102.5 KiB
/sites/default/files/styles/4_3_1400_1050_focal_point/pub...1209600.0 s101.1 KiB
/sites/default/files/styles/2_1_1400_700_focal_point/publ...1209600.0 s97.9 KiB
/sites/default/files/styles/4_3_1400_1050_focal_point/pub...1209600.0 s97.0 KiB
/sites/default/files/styles/4_3_1400_1050_focal_point/pub...1209600.0 s85.9 KiB
/sites/default/files/styles/4_3_1400_1050_focal_point/pub...1209600.0 s85.2 KiB
/sites/default/files/styles/2_1_1400_700_focal_point/publ...1209600.0 s79.7 KiB
/sites/default/files/styles/3_2_1400x933_focal_point/publ...1209600.0 s79.3 KiB
/sites/default/files/styles/3_2_1400x933_focal_point/publ...1209600.0 s74.1 KiB
assets.edfcdn.org/assets/global/dist/js/assets/signups.min.js?v=20260422233600.0 s7.5 KiB
assets.edfcdn.org/assets/global/dist/js/assets/cookieconsent.min.js600.0 s6.4 KiB
/sites/default/files/styles/2_1_732_366_focal_point/publi...1209600.0 s59.4 KiB
/sites/default/files/styles/3_2_1400x933_focal_point/publ...1209600.0 s59.0 KiB
/sites/default/files/styles/2_1_1400_700_focal_point/publ...1209600.0 s54.7 KiB
/sites/default/files/styles/2_1_1400_700_focal_point/publ...1209600.0 s53.3 KiB
assets.edfcdn.org/assets/donation_starter/dist/js/donation_starter.min.js600.0 s5.7 KiB
assets.edfcdn.org/assets/global/dist/js/css/cookieconsent.css600.0 s4.5 KiB
/sites/default/files/overlay-mobile-images/homepage-takeo...1209600.0 s40.9 KiB
/sites/default/files/styles/3_2_504_336_focal_point/publi...1209600.0 s37.8 KiB
/sites/default/files/styles/3_2_504_336_focal_point/publi...1209600.0 s37.2 KiB
/sites/default/files/styles/2_1_732_366_focal_point/publi...1209600.0 s35.2 KiB
assets.edfcdn.org/assets/mailchimp/dist/js/signup.min.js600.0 s3.5 KiB
/sites/default/files/styles/3_2_504_336_focal_point/publi...1209600.0 s30.7 KiB
/sites/default/files/styles/2_1_732_366_focal_point/publi...1209600.0 s29.5 KiB
/sites/default/files/js/js_t6Gpq-JUyC8ONfgYv1oJLR49qonCRR...1209600.0 s29.3 KiB
/sites/default/files/styles/3_2_504_336_focal_point/publi...1209600.0 s28.7 KiB
script.crazyegg.com/pages/scripts/0011/2468.js?493583300.0 s2.7 KiB
/sites/default/files/styles/2_1_732_366_focal_point/publi...1209600.0 s25.7 KiB
assets.edfcdn.org/assets/fundraise_up/dist/js/fundraise_up.min.js600.0 s2.7 KiB
/sites/default/files/styles/2_1_732_366_focal_point/publi...1209600.0 s25.2 KiB
/sites/default/files/styles/2_1_732_366_focal_point/publi...1209600.0 s22.5 KiB
/sites/default/files/styles/2_1_732_366_focal_point/publi...1209600.0 s21.3 KiB
/sites/default/files/styles/2_1_732_366_focal_point/publi...1209600.0 s19.8 KiB
/sites/default/files/styles/2_1_732_366_focal_point/publi...1209600.0 s18.5 KiB
/sites/default/files/css/css_CEvqf4ZT1oBdc4-6iOOd6J192mD0...1209600.0 s18.4 KiB
assets.edfcdn.org/assets/donation_starter/dist/css/donation_starter.min.css600.0 s1.3 KiB
/sites/default/files/styles/2_1_732_366_focal_point/publi...1209600.0 s10.9 KiB
/sites/default/files/styles/2_1_732_366_focal_point/publi...1209600.0 s9.2 KiB
/sites/default/files/styles/2_1_366_183_focal_point/publi...1209600.0 s7.6 KiB
assets.edfcdn.org/assets/global/dist/js/assets/homepage.min.js?v=20260422233600.0 s652 B
cdn.fundraiseup.com/embed-data/elements-global/AQBHBSYR.js0.0 ms364 B
assets.edfcdn.org/assets/fundraise_up/dist/css/fundraise_up.min.css600.0 s391 B
www.edf.org/themes/edf2020/images/source/site-logo.svg1209600.0 s3.2 KiB
www.edf.org/themes/edf2020/images/optimized/site-logo.svg1209600.0 s3.1 KiB
www.edf.org/themes/edf2020/images/icons/Molecule.svg1209600.0 s3.0 KiB
www.edf.org/themes/edf2020/images/icons/Handshake.svg1209600.0 s2.6 KiB
www.edf.org/themes/edf2020/images/icons/Justice.svg1209600.0 s1.8 KiB
www.edf.org/themes/edf2020/images/icons/Building.svg1209600.0 s1.7 KiB
/sites/default/files/styles/hidden/public/2021-06/NBS_her...300.0 s164 B
www.edf.org/themes/edf2020/images/icons/Culture.svg1209600.0 s1.4 KiB
www.edf.org/themes/edf2020/images/icons/Bar-graph.svg1209600.0 s1.4 KiB
www.edf.org/themes/edf2020/images/source/watermark-logo.svg1209600.0 s1.4 KiB
/sites/default/files/css/css_mIZjsccq_aPU1p6hZuB3pRH7D0tW...1209600.0 s1.3 KiB
/browser/v1/input/metrics?k=97a33aa010f59c9472d2db76b210a...0.0 ms126 B
www.edf.org/themes/edf2020/images/source/edf-logomark-white-outline.svg1209600.0 s1.3 KiB
/sites/default/files/css/css_r3xo6xvgWFsxYqud2vo2O-P4yton...1209600.0 s1.2 KiB
www.edf.org/themes/edf2020/images/optimized/logo--vital-signs.svg1209600.0 s1.1 KiB
/browser/v1/input/metrics?k=97a33aa010f59c9472d2db76b210a...0.0 ms83 B
www.edf.org/themes/edf2020/images/source/hero-two-swooshes.svg1209600.0 s726 B
/browser/v1/input/metrics?k=97a33aa010f59c9472d2db76b210a...0.0 ms62 B
/browser/v1/input/metrics?k=97a33aa010f59c9472d2db76b210a...0.0 ms60 B
/browser/v1/input/metrics?k=97a33aa010f59c9472d2db76b210a...0.0 ms60 B
/browser/v1/input/metrics?k=97a33aa010f59c9472d2db76b210a...0.0 ms60 B
/browser/v1/input/metrics?k=97a33aa010f59c9472d2db76b210a...0.0 ms60 B
/browser/v1/input/metrics?k=97a33aa010f59c9472d2db76b210a...0.0 ms60 B
www.edf.org/themes/edf2020/images/source/arrow-right.svg1209600.0 s458 B
www.edf.org/themes/edf2020/images/optimized/arrow-right-white.svg1209600.0 s345 B
www.edf.org/themes/edf2020/images/optimized/close--circle.svg1209600.0 s339 B
www.edf.org/themes/edf2020/images/source/arrow-right-white.svg1209600.0 s280 B
www.edf.org/themes/edf2020/images/optimized/arrow-right-black.svg1209600.0 s233 B
/sites/default/files/styles/hidden/public/2025-07/methane...1209600.0 s224 B
/sites/default/files/styles/hidden/public/2020-08/annual-...1209600.0 s222 B
/sites/default/files/styles/hidden/public/2023-05/MSAT-la...1209600.0 s179 B
/sites/default/files/styles/hidden/public/2023-05/reducin...1209600.0 s163 B
/sites/default/files/styles/hidden/public/2023-05/GettyIm...1209600.0 s157 B
/sites/default/files/styles/hidden/public/2023-05/gettyim...1209600.0 s153 B
/sites/default/files/styles/hidden/public/2023-05/hydroge...1209600.0 s147 B

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:62.616 source:map[column:76617 line:3 type:source-location url:https://assets.edfcdn.org/assets/global/dist/js/utilities.min.js?v=2026042207 urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:62.616 source:map[column:240828 line:2 type:source-location url:https://assets.edfcdn.org/assets/global/dist/js/utilities.min.js?v=2026042207 urlProvider:network]] map[reflowTime:1.36 source:map[column:1578 line:7 type:source-location url:https://www.edf.org/sites/default/files/js/js_t6Gpq-JUyC8ONfgYv1oJLR49qonCRRHWCnitPZfhV-Y.js?scope=footer&delta=0&language=en&theme=edf2020&include=eJxNy1sKgCAQRuENZYobiqH-UvGWMwa1-nqSHs8Hh5ghi88Bq5SmA8-CVNFIesNydv9M2HZrrNGuJKhKB5RDK4MjCVgUf7sHD2a54y-l1EzXC9gtJ3M urlProvider:network]] map[reflowTime:50.304 source:map[column:51681 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js urlProvider:network]] map[reflowTime:1.098 source:map[column:52357 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js urlProvider:network]] map[reflowTime:0.192 source:map[column:52415 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js urlProvider:network]] map[reflowTime:0.176 source:map[column:52479 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js urlProvider:network]] map[reflowTime:0.67 source:map[column:51703 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js urlProvider:network]] map[reflowTime:0.274 source:map[column:53392 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js urlProvider:network]] map[reflowTime:56.296 source:map[column:149826 line:2 type:source-location url:https://cdn.fundraiseup.com/widget/AQBHBSYR urlProvider:network]]]

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
Bird's-eye view of a coastal marsh in Oregon figure.issues-card-img-container > div > picture > img
/sites/default/files/styles/2_1_1400_700_focal_point/publ...245.4 KiB236.1 KiB
A fishing boat at the dock. div.visual-holder > div > picture > img
/sites/default/files/styles/3_2_1400x933_focal_point/publ...153.5 KiB140.2 KiB
Earth from space div.visual-holder > div > picture > img
/sites/default/files/styles/3_2_1400x933_focal_point/publ...138.9 KiB126.9 KiB
Person in lab preparing instrument for MethaneSAT methane-tracking satellite figure.issues-card-img-container > div > picture > img
/sites/default/files/styles/2_1_1400_700_focal_point/publ...127.9 KiB120.5 KiB
Blue hydrogen tank with "H2 Hydrogen" on it figure.issues-card-img-container > div > picture > img
/sites/default/files/styles/2_1_1400_700_focal_point/publ...127.3 KiB119.8 KiB
Close up of hands holding wheat in a field figure.issues-card-img-container > div > picture > img
/sites/default/files/styles/2_1_1400_700_focal_point/publ...102.2 KiB96.2 KiB
A cover crop's green leaves emerge among dry wheat stems after the harvest, wit… article > div > picture > img
/sites/default/files/styles/4_3_1400_1050_focal_point/pub...100.9 KiB94.4 KiB
Blue sky over a reflective river figure.issues-card-img-container > div > picture > img
/sites/default/files/styles/2_1_1400_700_focal_point/publ...97.7 KiB92.0 KiB
Aerial view of a harbor in Galveston, Texas, in the United States. article > div > picture > img
/sites/default/files/styles/4_3_1400_1050_focal_point/pub...96.8 KiB90.5 KiB
Two divers swimming in a submerged net cage. article > div > picture > img
/sites/default/files/styles/4_3_1400_1050_focal_point/pub...85.8 KiB80.2 KiB
article > div > picture > img article > div > picture > img
/sites/default/files/styles/4_3_1400_1050_focal_point/pub...85.0 KiB79.5 KiB
Fisherman on fishing boat figure.issues-card-img-container > div > picture > img
/sites/default/files/styles/2_1_1400_700_focal_point/publ...79.6 KiB74.9 KiB
smokestacks billowing pollution into a blue sky dotted with white clouds div.visual-holder > div > picture > img
/sites/default/files/styles/3_2_1400x933_focal_point/publ...73.9 KiB67.5 KiB
Methane pump figure.issues-card-img-container > div > picture > img
/sites/default/files/styles/2_1_1400_700_focal_point/publ...54.5 KiB51.3 KiB
A person looking at the back of a package in a grocery store figure.issues-card-img-container > div > picture > img
/sites/default/files/styles/2_1_1400_700_focal_point/publ...53.1 KiB50.0 KiB
body.not-logged-in > div#modal > ::before body.not-logged-in > div#modal > ::before
/sites/default/files/overlay-mobile-images/homepage-takeo...40.7 KiB12.5 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-2-IMG
nodeLabel: Earth from space
path: 1,HTML,1,BODY,3,DIV,10,MAIN,0,DIV,0,DIV,1,ARTICLE,0,DIV,0,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,FIGURE,0,DIV,0,DIV,0,PICTURE,10,IMG
selector: div.visual-holder > div > picture > img
snippet: <img loading="eager" width="504" height="336" src="https://www.edf.org/sites/default/files/styles/3_2_1400x933_focal_point/pu…" alt="Earth from space">

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

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
assets.edfcdn.org/assets/global/dist/js/utilities.min.js?v=202604220785.3 KiB2.4 s
/sites/default/files/css/css_CEvqf4ZT1oBdc4-6iOOd6J192mD0...18.4 KiB601 ms
/sites/default/files/css/css_mIZjsccq_aPU1p6hZuB3pRH7D0tW...1.3 KiB150 ms
/sites/default/files/css/css_r3xo6xvgWFsxYqud2vo2O-P4yton...1.2 KiB

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.

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: 752 ms
URLTime Spent
edf.org/752 ms
www.edf.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

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: 170 ms 55.6 KiB
URLTransfer SizeEst Savings
code,pre{font-family:Courier New,DejaVu Sans Mono,monospace} …38.0 KiB25.6 KiB
www.edf.org/themes/edf/css/standalone-css/overlays.css16.5 KiB15.5 KiB
/sites/default/files/css/css_CEvqf4ZT1oBdc4-6iOOd6J192mD0...18.3 KiB14.5 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: 3.8 s 747.0 KiB
URLTransfer SizeEst Savings
static.fundraiseup.com/checkout.621abe447e62aa70.js410.8 KiB366.3 KiB
static.fundraiseup.com/checkout-sentry-vendor.dda4c7629502a974.js111.7 KiB111.6 KiB
static.fundraiseup.com/checkout-vendors.78ab7844d94042df.js105.1 KiB87.3 KiB
www.googletagmanager.com/gtag/js?id=DC-4390944130.6 KiB53.0 KiB
admin-pipeline.upsun-us-2.observability-pipeline.blackfire.io/js/probe.js96.3 KiB30.6 KiB
assets.edfcdn.org/assets/global/dist/js/utilities.min.js?v=202604220784.7 KiB28.5 KiB
/pages/versioned/common-scripts/d4db359b93044eca900e8363b...55.3 KiB26.2 KiB
static.fundraiseup.com/checkout-styles.fab72e48733dfd10.js22.3 KiB22.3 KiB
cdn.fundraiseup.com/widget/AQBHBSYR64.6 KiB21.1 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.

URLTotal CPU TimeScript EvaluationScript Parse
assets.edfcdn.org/assets/global/dist/js/utilities.min.js?v=20260422071.5 s778 ms22 ms
Unattributable777 ms14 ms0.0 ms
admin-pipeline.upsun-us-2.observability-pipeline.blackfire.io/js/probe.js558 ms409 ms8.0 ms
cdn.fundraiseup.com/widget/AQBHBSYR434 ms182 ms24 ms
www.edf.org/401 ms22 ms5.8 ms
/sites/default/files/js/js_t6Gpq-JUyC8ONfgYv1oJLR49qonCRR...396 ms159 ms13 ms
static.fundraiseup.com/donation-form.41b66f2219e57ec2.js382 ms329 ms12 ms
scripts.clarity.ms/0.8.59/clarity.js255 ms235 ms6.4 ms
static.fundraiseup.com/checkout-vendors.78ab7844d94042df.js238 ms209 ms28 ms
/pages/versioned/common-scripts/d4db359b93044eca900e8363b...233 ms203 ms12 ms
www.googletagmanager.com/gtag/js?id=DC-4390944229 ms192 ms36 ms
static.fundraiseup.com/9483.dfe5e250c2aa64d2.js187 ms103 ms0.9 ms
static.fundraiseup.com/checkout.621abe447e62aa70.js165 ms2.2 ms162 ms
cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js88 ms54 ms7.0 ms
static.fundraiseup.com/elementsApi.f3d559d9c515427c.js77 ms65 ms9.9 ms
static.fundraiseup.com/elements-langs-vendors.86315bee0669542d.js74 ms0.7 ms73 ms
/pages/versioned/tracking-scripts/075b3cf3a9f0c618a72ef7b...67 ms60 ms6.2 ms
static.fundraiseup.com/elements-vendors.c590dd34e4f5ac29.js61 ms26 ms5.6 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation3.3 s
Style & Layout1.2 s
Other1.2 s
Script Parsing & Compilation494 ms
Parse HTML & CSS120 ms
Garbage Collection98 ms
Rendering90 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
The page has an unload handler in the main frame.Actionable
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 3.0 KiB
URLTransfer SizeEst Savings
.fun-widget-backdrop-holder { inset: 0 !important; width: 100% !important; … } …4.0 KiB3.0 KiB

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 2.0 KiB
URLTransfer SizeEst Savings
inline: (()=>{ function getAllData…4.2 KiB2.0 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.

URLTransfer Size
static.fundraiseup.com/checkout.621abe447e62aa70.js411.1 KiB
www.edf.org/252.9 KiB
/sites/default/files/styles/2_1_1400_700_focal_point/publ...245.7 KiB
/sites/default/files/styles/3_2_1400x933_focal_point/publ...237.9 KiB
/sites/default/files/styles/3_2_1400x933_focal_point/publ...153.7 KiB
static.fundraiseup.com/elements-langs-vendors.86315bee0669542d.js139.6 KiB
/sites/default/files/styles/3_2_1400x933_focal_point/publ...139.2 KiB
www.googletagmanager.com/gtag/js?id=DC-4390944131.0 KiB
/sites/default/files/styles/3_2_1400x933_focal_point/publ...130.6 KiB
/sites/default/files/styles/2_1_1400_700_focal_point/publ...128.1 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
Environmental Defense Fund Logo header#block-topnav-edf2020 > div.logo-holder > a.site-logo__link > img.site-logo
www.edf.org/themes/edf2020/images/source/site-logo.svg
Environmental Defense Fund Logo div.first-columns > div.column > a > img.site-logo
www.edf.org/themes/edf2020/images/source/site-logo.svg

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
●User Timing marks and measures 3 user timings
●Avoid long main-thread tasks 20 long tasks found
●Avoid non-composited animations 11 animated elements found
●Network Requests
●Network Round Trip Times 100 ms
●Server Backend Latencies 410 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 0 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
97

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 dialog elements without accessible names may prevent screen readers users from discerning the purpose of these elements. Learn how to make ARIA dialog elements more accessible.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
We use cookies to personalize content and ads, to provide social media features… body.not-logged-in > div#cc--main > div#cc_div > div#cm

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.

○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
●`[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
●`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
●Definition list items are wrapped in `<dl>` elements
●Document has a `<title>` element
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Uses ARIA roles only on compatible elements
●Identical links have the same purpose.
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA input fields 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
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○`<input type="image">` elements have `[alt]` text
○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.
77

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)
Earth from space div.thumbnails-container > div.thumbnails > button.change-slide > img
/sites/default/files/styles/3_2_504_336_focal_point/publi...190 x 130 (1.46)504 x 336 (1.50)
A fishing boat at the dock. div.thumbnails-container > div.thumbnails > button.change-slide > img
/sites/default/files/styles/3_2_504_336_focal_point/publi...190 x 130 (1.46)504 x 336 (1.50)
smokestacks billowing pollution into a blue sky dotted with white clouds div.thumbnails-container > div.thumbnails > button.change-slide > img
/sites/default/files/styles/3_2_504_336_focal_point/publi...190 x 130 (1.46)504 x 336 (1.50)

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Unload event listeners are deprecated and will be removed.
assets.edfcdn.org/assets/global/dist/js/utilities.min.js?v=2026042207 line 2, col 77474
●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 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
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
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

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 destinationLink Text
www.edf.org/protectLearn more

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 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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