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
/++theme++2025-05-16/new-frontpage/fonts/Source_Serif_4/S...	3600.0 s	1.1 MiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/most-wanted.jpg	3600.0 s	1.1 MiB
/++theme++2025-05-16/new-frontpage/img/armed-person-at-na...	3600.0 s	530.1 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/fonts/Rajdhani/Rajdhani-Bold.ttf	3600.0 s	364.9 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/fonts/Rajdhani/Rajdhani-Medium.ttf	3600.0 s	349.9 KiB
/++theme++2025-05-16/new-frontpage/fonts/Rajdhani/Rajdhan...	3600.0 s	344.3 KiB
www.fbi.gov/++plone++production/++unique++2025-08-18T20:53:28.626929/default.js	3600.0 s	341.0 KiB
www.fbi.gov/++plone++production/++unique++2025-08-18T20:53:28.626929/default.css	3600.0 s	282.5 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/leadership.png	3600.0 s	183.7 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/what-we-investigate.png	3600.0 s	170.5 KiB
/++theme++2025-05-16/new-frontpage/img/Kash-Patel---MISSI...	3600.0 s	161.1 KiB
/++theme++2025-05-16/new-frontpage/fontawesome/webfonts/f...	3600.0 s	154.9 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/news.png	3600.0 s	142.1 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/photos.png	3600.0 s	139.3 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/mission.png	3600.0 s	124.0 KiB
/++theme++2025-05-16/new-frontpage/fontawesome/webfonts/f...	3600.0 s	116.3 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/andrew-bailey-headshot.jpg	3600.0 s	111.8 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/podcasts.png	3600.0 s	94.4 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/kash-patel.png	3600.0 s	86.7 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/co-dd-raia-headshot-2.jpg	3600.0 s	79.6 KiB
www.fbi.gov/++plone++castle-advantage/libs/audioplayer/audioplayer.js	3600.0 s	60.1 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/fbi-logo.png	3600.0 s	38.2 KiB
www.fbi.gov/++theme++2025-05-16/css/index.css	3600.0 s	36.2 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/bootstrap/css/bootstrap.min.css	3600.0 s	32.7 KiB
/++theme++2025-05-16/new-frontpage/bootstrap/js/bootstrap...	3600.0 s	24.3 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/fontawesome/css/all.min.css	3600.0 s	22.0 KiB
www.fbi.gov/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?	14400.0 s	13.8 KiB
dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOJ&subagency=FBI	0.0 ms	9.4 KiB
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	0.0 ms	4.5 KiB
/++theme++2025-05-16/new-frontpage/img/Learn-What-the-FBI...	3600.0 s	4.1 KiB
/++theme++2025-05-16/new-frontpage/img/Learn-About-Common...	3600.0 s	3.6 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/styles.css?v=1.1	3600.0 s	3.5 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/Find-Crime-Stats.png	3600.0 s	3.2 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/Discover-FBI-History.png	3600.0 s	2.7 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/Contact-the-FBI.png	3600.0 s	2.6 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/Submit-a-Tip.png	3600.0 s	2.4 KiB
/++theme++2025-05-16/new-frontpage/img/Get-a-Rap-Sheet-(I...	3600.0 s	2.4 KiB
/++theme++2025-05-16/new-frontpage/img/Learn-How-to-Preve...	3600.0 s	2.1 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/Apply-for-an-FBI-Job.png	3600.0 s	1.4 KiB
/++theme++2025-05-16/new-frontpage/img/Help-Find-Fugitive...	3600.0 s	1.4 KiB
www.fbi.gov/++plone++castle/less/public/print.css	3600.0 s	1.2 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/frontpage.js	3600.0 s	1.1 KiB
www.fbi.gov/++theme++fbigov.theme/uswds-2.9.0/img/icon-dot-gov.svg	3600.0 s	758 B
www.fbi.gov/++theme++fbigov.theme/uswds-2.9.0/img/icon-https.svg	3600.0 s	716 B
www.fbi.gov/++theme++2025-05-16/uswds-2.9.0/img/angle-arrow-down.svg	3600.0 s	691 B
www.fbi.gov/++theme++2025-05-16/new-frontpage/fonts.css	3600.0 s	620 B
www.fbi.gov/++theme++2025-05-16/uswds-2.9.0/img/lock.svg	3600.0 s	607 B
www.fbi.gov/++theme++2025-05-16/uswds-2.9.0/img/us_flag_small.png	3600.0 s	548 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.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
/++theme++2025-05-16/new-frontpage/fonts/Rajdhani/Rajdhan...	265 ms
/++theme++2025-05-16/new-frontpage/fonts/Source_Serif_4/S...	250 ms
www.fbi.gov/++theme++2025-05-16/new-frontpage/fonts/Rajdhani/Rajdhani-Medium.ttf	215 ms
/++theme++2025-05-16/new-frontpage/fontawesome/webfonts/f...	205 ms
www.fbi.gov/++theme++2025-05-16/new-frontpage/fonts/Rajdhani/Rajdhani-Bold.ttf	195 ms
/++theme++2025-05-16/new-frontpage/fontawesome/webfonts/f...	175 ms

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:30.745 source:map[column:538365 line:2567 type:source-location url:https://www.fbi.gov/++plone++production/++unique++2025-08-18T20:53:28.626929/default.js 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.

	URL	Resource Size	Est Savings
FBI Most Wanted `div.hero-carousel > div#slide-2 > div.hero-image > img`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/most-wanted.jpg	1.1 MiB	1.1 MiB
Nighttime doorbell cam photos of suspect mosaic `div.hero-carousel > div#slide-3 > div.hero-image > img`	/++theme++2025-05-16/new-frontpage/img/armed-person-at-na...	529.6 KiB	509.6 KiB
Leadership and Structure `div.col-lg-4 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/leadership.png	183.2 KiB	178.7 KiB
What We Investigate `div.col-lg-3 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/what-we-investigate.png	170.1 KiB	153.7 KiB
Kash Patel - Mission Statement `div.hero-carousel > div#slide-1 > div.hero-image > img`	/++theme++2025-05-16/new-frontpage/img/Kash-Patel---MISSI...	160.7 KiB	135.7 KiB
News `div.col-lg-3 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/news.png	141.6 KiB	128.0 KiB
Photos `div.col-lg-3 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/photos.png	138.8 KiB	125.5 KiB
Mission and Priorities `div.col-lg-4 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/mission.png	123.5 KiB	120.5 KiB
Deputy Director `div.col-lg-4 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/andrew-bailey-headshot.jpg	111.4 KiB	107.5 KiB
Podcasts `div.col-lg-3 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/podcasts.png	94.0 KiB	84.9 KiB
Director `div.col-lg-4 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/kash-patel.png	86.3 KiB	83.2 KiB
Deputy Director `div.col-lg-4 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/co-dd-raia-headshot-2.jpg	79.2 KiB	76.6 KiB
FBI Seal `div.d-flex > div.d-flex > a > img.me-3`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/fbi-logo.png	37.8 KiB	36.5 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-4-IMG

nodeLabel: Kash Patel - Mission Statement

path: 1,HTML,1,BODY,0,DIV,1,DIV,2,DIV,0,DIV,3,SECTION,0,DIV,0,DIV,0,DIV,0,IMG

selector: div.hero-carousel > div#slide-1 > div.hero-image > img

snippet: <img src="https://www.fbi.gov/++theme++2025-05-16/new-frontpage/img/Kash-Patel---MIS…" alt="Kash Patel - Mission Statement">

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

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
www.fbi.gov/++theme++2025-05-16/new-frontpage/bootstrap/css/bootstrap.min.css	32.7 KiB	1.7 s
www.fbi.gov/++theme++2025-05-16/new-frontpage/fontawesome/css/all.min.css	22.0 KiB	1.4 s
www.fbi.gov/++plone++production/++unique++2025-08-18T20:53:28.626929/default.css	282.5 KiB	10.0 s
www.fbi.gov/++theme++2025-05-16/css/index.css	36.2 KiB	1.9 s
www.fbi.gov/++theme++2025-05-16/new-frontpage/styles.css?v=1.1	3.5 KiB	616 ms
www.fbi.gov/++theme++2025-05-16/new-frontpage/fonts.css	620 B	616 ms

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 762 ms

URL	Time Spent
fbi.gov/	762 ms
www.fbi.gov/	0.0 ms

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.3 s 368.0 KiB

URL	Transfer Size	Est Savings
www.fbi.gov/++plone++production/++unique++2025-08-18T20:53:28.626929/default.css	282.1 KiB	282.1 KiB
www.fbi.gov/++theme++2025-05-16/css/index.css	35.8 KiB	34.4 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/bootstrap/css/bootstrap.min.css	32.4 KiB	30.2 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/fontawesome/css/all.min.css	21.6 KiB	21.2 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.

Estimated savings: 1.9 s 489.9 KiB

URL	Transfer Size	Est Savings
www.fbi.gov/++plone++production/++unique++2025-08-18T20:53:28.626929/default.js	334.6 KiB	216.6 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1	147.2 KiB	106.1 KiB
www.googletagmanager.com/gtag/js?id=G-DBEM2FVVRF	171.9 KiB	65.2 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.2 KiB	62.6 KiB
www.fbi.gov/++plone++castle-advantage/libs/audioplayer/audioplayer.js	59.7 KiB	39.4 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
www.fbi.gov/++plone++production/++unique++2025-08-18T20:53:28.626929/default.js	1.1 s	672 ms	285 ms
Unattributable	821 ms	13 ms	0.0 ms
www.googletagmanager.com/gtag/js?id=G-DBEM2FVVRF	534 ms	437 ms	92 ms
www.fbi.gov/	534 ms	71 ms	6.0 ms
www.fbi.gov/cdn-cgi/challenge-platform/scripts/jsd/main.js	401 ms	383 ms	6.3 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	354 ms	284 ms	68 ms
www.fbi.gov/++plone++castle-advantage/libs/audioplayer/audioplayer.js	138 ms	78 ms	58 ms
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	137 ms	131 ms	2.4 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1	97 ms	34 ms	62 ms
www.fbi.gov/++plone++production/++unique++2025-08-18T20:53:28.626929/default.css	92 ms	0.0 ms	0.0 ms
www.fbi.gov/++theme++2025-05-16/new-frontpage/bootstrap/css/bootstrap.min.css	84 ms	0.0 ms	0.0 ms
dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOJ&subagency=FBI	74 ms	68 ms	4.9 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	2.2 s
Other	917 ms
Script Parsing & Compilation	599 ms
Style & Layout	461 ms
Parse HTML & CSS	221 ms
Garbage Collection	79 ms
Rendering	41 ms

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
/++theme++2025-05-16/new-frontpage/fonts/Source_Serif_4/S...	1.1 MiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/most-wanted.jpg	1.1 MiB
/++theme++2025-05-16/new-frontpage/img/armed-person-at-na...	530.1 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/fonts/Rajdhani/Rajdhani-Bold.ttf	364.9 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/fonts/Rajdhani/Rajdhani-Medium.ttf	349.9 KiB
/++theme++2025-05-16/new-frontpage/fonts/Rajdhani/Rajdhan...	344.3 KiB
www.fbi.gov/++plone++production/++unique++2025-08-18T20:53:28.626929/default.js	341.0 KiB
www.fbi.gov/++plone++production/++unique++2025-08-18T20:53:28.626929/default.css	282.5 KiB
www.fbi.gov/++theme++2025-05-16/new-frontpage/img/leadership.png	183.7 KiB
www.googletagmanager.com/gtag/js?id=G-DBEM2FVVRF	172.3 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
Leadership and Structure `div.col-lg-4 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/leadership.png
Mission and Priorities `div.col-lg-4 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/mission.png
Deputy Director `div.col-lg-4 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/co-dd-raia-headshot-2.jpg
Director `div.col-lg-4 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/kash-patel.png
Deputy Director `div.col-lg-4 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/andrew-bailey-headshot.jpg
News `div.col-lg-3 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/news.png
Podcasts `div.col-lg-3 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/podcasts.png
What We Investigate `div.col-lg-3 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/what-we-investigate.png
Photos `div.col-lg-3 > a > div.card > img.card-img-top`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/photos.png
FBI Logo `div.mt-auto > div.text-center > a > img.img-fluid`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/fbi-logo.png
FBI Seal `div.d-flex > div.d-flex > a > img.me-3`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/fbi-logo.png
Apply for an FBI Job `div.quick-link > div.icon-container > a > img.img-fluid`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/Apply-for-an-FBI-Job.png
Submit a Tip `div.quick-link > div.icon-container > a > img.img-fluid`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/Submit-a-Tip.png
Help Find Fugitives & Missing Persons `div.quick-link > div.icon-container > a > img.img-fluid`	/++theme++2025-05-16/new-frontpage/img/Help-Find-Fugitive...
Get a Rap Sheet (Identity History) `div.quick-link > div.icon-container > a > img.img-fluid`	/++theme++2025-05-16/new-frontpage/img/Get-a-Rap-Sheet-(I...
Contact the FBI `div.quick-link > div.icon-container > a > img.img-fluid`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/Contact-the-FBI.png
Find Crime Stats `div.quick-link > div.icon-container > a > img.img-fluid`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/Find-Crime-Stats.png
Learn About Common Crimes & Scams `div.quick-link > div.icon-container > a > img.img-fluid`	/++theme++2025-05-16/new-frontpage/img/Learn-About-Common...
Learn What the FBI Investigates `div.quick-link > div.icon-container > a > img.img-fluid`	/++theme++2025-05-16/new-frontpage/img/Learn-What-the-FBI...
Help Find Fugitives & Missing Persons `div.quick-link > div.icon-container > a > img.img-fluid`	/++theme++2025-05-16/new-frontpage/img/Learn-How-to-Preve...
Discover FBI History `div.quick-link > div.icon-container > a > img.img-fluid`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/Discover-FBI-History.png

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

●Layout shift culprits

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●User Timing marks and measures 14 user timings

●Avoid long main-thread tasks 19 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 10 ms

●Server Backend Latencies 140 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 180 ms

○INP breakdown

○Avoid non-composited animations

○Avoid large layout shifts

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

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
Apply for an FBI Job `div.g-4 > div.col-6 > div.quick-link > h6`
Most Wanted `div.container > div.row > div.col-md-3 > h5.mb-3`

These are opportunities to improve keyboard navigation in your application.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.top-nav-bar > div.top-nav-bar-bottom > div.left > img `div.top-nav-bar > div.top-nav-bar-bottom > div.left > img`
div.top-nav-bar > div.top-nav-bar-bottom > div.right > img `div.top-nav-bar > div.top-nav-bar-bottom > div.right > img`

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.container > div.header-mobile-row > div > a.nav-link `div.container > div.header-mobile-row > div > a.nav-link`
div.container > div.header-mobile-row > div.header-mobile-search > a.text-white `div.container > div.header-mobile-row > div.header-mobile-search > a.text-white`
div.d-flex > div.d-flex > div.social-icons > a.text-white `div.d-flex > div.d-flex > div.social-icons > a.text-white`
div.d-flex > div.d-flex > div.social-icons > a.text-white `div.d-flex > div.d-flex > div.social-icons > a.text-white`
div.d-flex > div.d-flex > div.social-icons > a.text-white `div.d-flex > div.d-flex > div.social-icons > a.text-white`
div.d-flex > div.d-flex > div.social-icons > a.text-white `div.d-flex > div.d-flex > div.social-icons > a.text-white`
div.d-flex > div.d-flex > div.social-icons > a.text-white `div.d-flex > div.d-flex > div.social-icons > a.text-white`
div.d-flex > div.d-flex > div.social-icons > a.text-white `div.d-flex > div.d-flex > div.social-icons > a.text-white`

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

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Slide 1 `section.hero-section > div.hero-indicators > div.d-flex > button.indicator`
Slide 2 `section.hero-section > div.hero-indicators > div.d-flex > button.indicator`
Slide 3 `section.hero-section > div.hero-indicators > div.d-flex > button.indicator`

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `html`

These items highlight common accessibility best practices.

○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>`

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

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

●Buttons have an accessible name

●`[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

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

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

●Identical links have the same purpose.

○`[accesskey]` values are unique

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

○Deprecated ARIA roles were not used

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

○`[aria-hidden="true"]` elements do not contain focusable descendents

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○`[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

○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.

○Skip links are focusable.

○No element has a `[tabindex]` value greater than 0

○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

○Elements with visible text labels have matching accessible names.

○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 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.

	URL	Aspect Ratio (Displayed)	Aspect Ratio (Actual)
FBI Logo `div.d-flex > div.d-flex > a > img.me-3`	www.fbi.gov/++theme++2025-05-16/new-frontpage/img/fbi-logo.png	1500 x 60 (25.00)	1500 x 324 (4.63)

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 / Warning	Source
SharedStorage	www.fbi.gov/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	www.fbi.gov/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	www.fbi.gov/cdn-cgi/challenge-platform/scripts/jsd/main.js

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	Map URL
www.fbi.gov/++plone++production/++unique++2025-08-18T20:53:28.626929/default.js	/++plone++production/++unique++2025-08-18T20:53:28.626929...
/++theme++2025-05-16/new-frontpage/bootstrap/js/bootstrap...	/++theme++2025-05-16/new-frontpage/bootstrap/js/bootstrap...
www.fbi.gov/++plone++castle-advantage/libs/audioplayer/audioplayer.js	www.fbi.gov/++plone++castle-advantage/libs/audioplayer/audioplayer.js.map
dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOJ&subagency=FBI	dap.digitalgov.gov/Federated.js.map

●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

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

SEO

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

Crawling and Indexing

Search engines are unable to include your pages in search results if they don't have permission to crawl them. Learn more about crawler directives.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Blocking Directive Source
`head > meta`

To appear in search results, crawlers need access to your app.

Content Best Practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destination	Link Text
www.fbi.gov/about/mission	Learn More
www.fbi.gov/wanted	Learn More
www.fbi.gov/wanted/kidnap/nancy-guthrie	More Information

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.top-nav-bar > div.top-nav-bar-bottom > div.left > img `div.top-nav-bar > div.top-nav-bar-bottom > div.left > img`
div.top-nav-bar > div.top-nav-bar-bottom > div.right > img `div.top-nav-bar > div.top-nav-bar-bottom > div.right > img`

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

○Structured data is valid

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links are crawlable

●robots.txt is valid

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`