Skip to content
https://mitre.org

Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
SCORE
0
GRADE
FIX
0
REVIEW
0
PASS
0
INFO
0

Detailed Report

Audit breakdown by category with detailed findings.

82

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
/sites/default/files/styles/hero/public/hero/2025-04/Capi...60.0 s326.2 KiB
/sites/default/files/styles/hero/public/hero/2025-05/sold...60.0 s213.0 KiB
/sites/default/files/styles/hero/public/hero/2025-04/busi...60.0 s173.3 KiB
/sites/default/files/styles/pod/public/hero/2022-07/Tiny-...60.0 s150.3 KiB
/sites/default/files/styles/hero/public/hero/2025-04/sate...60.0 s126.1 KiB
/sites/default/files/styles/pod/public/hero/2025-12/cyber...60.0 s124.4 KiB
/sites/default/files/styles/hero/public/hero/2025-04/plan...60.0 s108.8 KiB
/sites/default/files/styles/pod/public/hero/2026-02/MITRE...60.0 s99.8 KiB
/sites/default/files/styles/pod/public/hero/2025-11/Chris...60.0 s96.6 KiB
/sites/default/files/styles/pod/public/hero/2024-03/quant...60.0 s93.4 KiB
/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNp...60.0 s83.5 KiB
/sites/default/files/styles/hero/public/hero/2026-02/Beyo...60.0 s81.4 KiB
/sites/default/files/styles/pod/public/hero/2025-01/BlueT...60.0 s79.3 KiB
/sites/default/files/styles/pod/public/hero/2026-02/Danie...60.0 s71.6 KiB
/sites/default/files/styles/pod/public/hero/2021-10/MITRE...60.0 s65.9 KiB
/sites/default/files/styles/pod/public/hero/2026-03/Asha-...60.0 s64.4 KiB
/sites/default/files/styles/hero/public/hero/2025-01/work...60.0 s63.9 KiB
/sites/default/files/styles/hero/public/hero/2025-04/woma...60.0 s55.8 KiB
/sites/default/files/styles/pod/public/hero/2021-12/Zakim...60.0 s54.4 KiB
/sites/default/files/styles/pod/public/hero/2026-04/Getty...60.0 s45.8 KiB
/sites/default/files/css/css_TVxUnvsfKdSFrwrPEES13rbCzAu3...60.0 s31.7 KiB
/themes/mitre/fonts/5730909/b1979d94-a178-4b03-b43d-c8e46...60.0 s18.0 KiB
/themes/mitre/fonts/5730921/135abd30-1390-4f9c-b6a2-d8431...60.0 s17.9 KiB
/themes/mitre/fonts/5730950/dae937ec-159f-4710-9b2d-9470e...60.0 s17.8 KiB
/themes/mitre/fonts/5730936/ee3d290f-f853-4ff3-913e-7bae6...60.0 s17.7 KiB
/themes/mitre/fonts/5730901/94557603-6403-4571-a92e-e7dfa...60.0 s17.4 KiB
s.go-mpulse.net/boomerang/FASQB-HBHXE-EUS9Q-7LJEZ-3FKTW604800.0 s56.9 KiB
/sites/default/files/css/css_SFiXTIMhGxZuzcOQV1HGSf4eOAQx...60.0 s3.0 KiB
www.mitre.org/themes/mitre/img/decor/button--hover--dark.svg60.0 s1.1 KiB
www.mitre.org/themes/mitre/img/decor/button--hover--light.svg60.0 s1.1 KiB
www.mitre.org/themes/mitre/img/icons/calendar.svg60.0 s1.1 KiB
www.mitre.org/themes/mitre/img/icons/contact.svg60.0 s1.0 KiB
www.mitre.org/themes/mitre/img/icons/globe.svg60.0 s989 B
/sites/default/files/google_tag/analytics_container/googl...60.0 s676 B
/lt/1.css?apiType=da&c=ca0e9577-b3c7-4964-b025-98f0d83161...1.0 s669 B
/sites/default/files/google_tag/social_media_and_marketin...60.0 s674 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.

URLEst Savings
/themes/mitre/fonts/5730950/dae937ec-159f-4710-9b2d-9470e...60 ms
/themes/mitre/fonts/5730921/135abd30-1390-4f9c-b6a2-d8431...60 ms
/themes/mitre/fonts/5730936/ee3d290f-f853-4ff3-913e-7bae6...55 ms
/themes/mitre/fonts/5730909/b1979d94-a178-4b03-b43d-c8e46...55 ms
/themes/mitre/fonts/5730901/94557603-6403-4571-a92e-e7dfa...25 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:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:40.517 source:map[column:156 line:13 type:source-location url:https://www.mitre.org/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNpPMMPU76h2-vCY.js?scope=footer&delta=0&language=en&theme=mitre&include=eJxVyFEOgCAIANALaRzJkWJjkTSk5vHbyp8-38sqaqsO4MYe8lQSxQI_BRou3HYodp0oy2Q42I1gE11RPqSOQr2qZYI3Yq_xRuGCztoeI78s8g 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:17.362 source:map[type:text value:[unattributed]]] map[reflowTime:4.956 source:map[column:96791 line:43 type:source-location url:https://www.mitre.org/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNpPMMPU76h2-vCY.js?scope=footer&delta=0&language=en&theme=mitre&include=eJxVyFEOgCAIANALaRzJkWJjkTSk5vHbyp8-38sqaqsO4MYe8lQSxQI_BRou3HYodp0oy2Q42I1gE11RPqSOQr2qZYI3Yq_xRuGCztoeI78s8g urlProvider:network]] map[reflowTime:14.702 source:map[column:50335 line:2 type:source-location url:https://www.mitre.org/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNpPMMPU76h2-vCY.js?scope=footer&delta=0&language=en&theme=mitre&include=eJxVyFEOgCAIANALaRzJkWJjkTSk5vHbyp8-38sqaqsO4MYe8lQSxQI_BRou3HYodp0oy2Q42I1gE11RPqSOQr2qZYI3Yq_xRuGCztoeI78s8g urlProvider:network]] map[reflowTime:0.377 source:map[column:50393 line:2 type:source-location url:https://www.mitre.org/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNpPMMPU76h2-vCY.js?scope=footer&delta=0&language=en&theme=mitre&include=eJxVyFEOgCAIANALaRzJkWJjkTSk5vHbyp8-38sqaqsO4MYe8lQSxQI_BRou3HYodp0oy2Q42I1gE11RPqSOQr2qZYI3Yq_xRuGCztoeI78s8g urlProvider:network]] map[reflowTime:0.408 source:map[column:50457 line:2 type:source-location url:https://www.mitre.org/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNpPMMPU76h2-vCY.js?scope=footer&delta=0&language=en&theme=mitre&include=eJxVyFEOgCAIANALaRzJkWJjkTSk5vHbyp8-38sqaqsO4MYe8lQSxQI_BRou3HYodp0oy2Q42I1gE11RPqSOQr2qZYI3Yq_xRuGCztoeI78s8g urlProvider:network]] map[reflowTime:15.794 source:map[column:49615 line:2 type:source-location url:https://www.mitre.org/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNpPMMPU76h2-vCY.js?scope=footer&delta=0&language=en&theme=mitre&include=eJxVyFEOgCAIANALaRzJkWJjkTSk5vHbyp8-38sqaqsO4MYe8lQSxQI_BRou3HYodp0oy2Q42I1gE11RPqSOQr2qZYI3Yq_xRuGCztoeI78s8g urlProvider:network]] map[reflowTime:0.556 source:map[column:51395 line:2 type:source-location url:https://www.mitre.org/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNpPMMPU76h2-vCY.js?scope=footer&delta=0&language=en&theme=mitre&include=eJxVyFEOgCAIANALaRzJkWJjkTSk5vHbyp8-38sqaqsO4MYe8lQSxQI_BRou3HYodp0oy2Q42I1gE11RPqSOQr2qZYI3Yq_xRuGCztoeI78s8g urlProvider:network]] map[reflowTime:2.787 source:map[column:49637 line:2 type:source-location url:https://www.mitre.org/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNpPMMPU76h2-vCY.js?scope=footer&delta=0&language=en&theme=mitre&include=eJxVyFEOgCAIANALaRzJkWJjkTSk5vHbyp8-38sqaqsO4MYe8lQSxQI_BRou3HYodp0oy2Q42I1gE11RPqSOQr2qZYI3Yq_xRuGCztoeI78s8g urlProvider:network]] map[reflowTime:0.827 source:map[column:74388 line:43 type:source-location url:https://www.mitre.org/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNpPMMPU76h2-vCY.js?scope=footer&delta=0&language=en&theme=mitre&include=eJxVyFEOgCAIANALaRzJkWJjkTSk5vHbyp8-38sqaqsO4MYe8lQSxQI_BRou3HYodp0oy2Q42I1gE11RPqSOQr2qZYI3Yq_xRuGCztoeI78s8g urlProvider:network]] map[reflowTime:0.11 source:map[column:106589 line:43 type:source-location url:https://www.mitre.org/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNpPMMPU76h2-vCY.js?scope=footer&delta=0&language=en&theme=mitre&include=eJxVyFEOgCAIANALaRzJkWJjkTSk5vHbyp8-38sqaqsO4MYe8lQSxQI_BRou3HYodp0oy2Q42I1gE11RPqSOQr2qZYI3Yq_xRuGCztoeI78s8g 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
Interior of the Capitol hill dome, Washington DC div.p-card__image > figure > picture > img
/sites/default/files/styles/hero/public/hero/2025-04/Capi...325.6 KiB279.3 KiB
A close-up view of MITRE's FUSE antenna article.node > div.card__image > figure > img.image-style-pod
/sites/default/files/styles/pod/public/hero/2022-07/Tiny-...149.9 KiB139.4 KiB
Businessman using computer in server room div.p-card__image > figure > picture > img
/sites/default/files/styles/hero/public/hero/2025-04/busi...172.8 KiB126.5 KiB
engineer with a tablet in computer room article.node > div.card__image > figure > img.image-style-pod
/sites/default/files/styles/pod/public/hero/2025-12/cyber...124.0 KiB113.5 KiB
Composite illustration showing a globe with abstract data lines and endpoints article.node > div.card__image > figure > img.image-style-pod
/sites/default/files/styles/pod/public/hero/2026-02/MITRE...99.3 KiB88.9 KiB
U.S. Rep. Chris Pappas visiting Bedford article.node > div.card__image > figure > img.image-style-pod
/sites/default/files/styles/pod/public/hero/2025-11/Chris...96.1 KiB85.7 KiB
Air Force Airman 1st Class Rashin Ortiz aligns a satellite during Bamboo Eagle div.p-card__image > figure > picture > img
/sites/default/files/styles/hero/public/hero/2025-04/sate...125.7 KiB79.4 KiB
Inside cabin of a large passenger plane div.p-card__image > figure > picture > img
/sites/default/files/styles/hero/public/hero/2025-04/plan...108.4 KiB62.0 KiB
Danielle Lohan article.node > div.card__image > figure > img.image-style-pod
/sites/default/files/styles/pod/public/hero/2026-02/Danie...71.2 KiB60.7 KiB
Asha Clark article.node > div.card__image > figure > img.image-style-pod
/sites/default/files/styles/pod/public/hero/2026-03/Asha-...64.0 KiB53.5 KiB
Employee holding a laptop in the BlueTech lab div#vertical-tab__panel-31376 > div.image > figure > img.image-style-pod
/sites/default/files/styles/pod/public/hero/2025-01/BlueT...78.9 KiB49.7 KiB
drone cloudy skies article.node > div.card__image > figure > img.image-style-pod
/sites/default/files/styles/pod/public/hero/2026-04/Getty...45.4 KiB34.9 KiB
Woman speaking with a doctor div.p-card__image > figure > picture > img
/sites/default/files/styles/hero/public/hero/2025-04/woma...55.4 KiB9.0 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-13-IMG
nodeLabel: red and blue composite image with the American flag in the background
path: 1,HTML,1,BODY,4,DIV,0,DIV,2,MAIN,2,ARTICLE,0,DIV,0,DIV,0,FIGURE,0,PICTURE,1,IMG
selector: div.homepage-hero__media > figure > picture > img
snippet: <img loading="eager" width="1000" height="1350" src="https://www.mitre.org/sites/default/files/styles/hero/public/hero/2026-02/…" alt="red and blue composite image with the American flag in the background">

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
fonts.googleapis.com/css2?family=Roboto+Mono&display=swap1.1 KiB259 ms
/sites/default/files/css/css_SFiXTIMhGxZuzcOQV1HGSf4eOAQx...3.0 KiB
/sites/default/files/css/css_TVxUnvsfKdSFrwrPEES13rbCzAu3...31.7 KiB81 ms
/lt/1.css?apiType=da&c=ca0e9577-b3c7-4964-b025-98f0d83161...669 B235 ms
cmp.osano.com/AzyhULTdPkqmy4aDN/f0e8e901-3feb-47c4-bd04-96df98c75dab/osano.js76.9 KiB405 ms

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: 567 ms
URLTime Spent
mitre.org/567 ms
www.mitre.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: 0.0 ms 24.8 KiB
URLTransfer SizeEst Savings
/sites/default/files/css/css_TVxUnvsfKdSFrwrPEES13rbCzAu3...31.3 KiB24.8 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: 40 ms 406.9 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtag/js?id=G-PYD2Z0G3XY&cx=c&gtm=4e64h1155.5 KiB72.3 KiB
www.googletagmanager.com/gtag/js?id=G-V82LD37W12&cx=c&gtm=4e64h1157.1 KiB72.1 KiB
www.googletagmanager.com/gtag/js?id=G-FCNJHL96VJ&cx=c&gtm=4e64h1150.9 KiB69.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-548FP3T117.1 KiB65.5 KiB
www.googletagmanager.com/gtm.js?id=GTM-MV8S3KQ132.0 KiB61.2 KiB
/sites/default/files/js/js_uB79mDFOfjdr-tBD-HAzCeLDl9GtNp...83.1 KiB42.3 KiB
cmp.osano.com/AzyhULTdPkqmy4aDN/f0e8e901-3feb-47c4-bd04-96df98c75dab/osano.js76.4 KiB24.1 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
/sites/default/files/styles/hero/public/hero/2025-04/Capi...326.2 KiB
/sites/default/files/styles/hero/public/hero/2025-05/sold...213.0 KiB
/sites/default/files/styles/hero/public/hero/2025-04/busi...173.3 KiB
www.googletagmanager.com/gtag/js?id=G-V82LD37W12&cx=c&gtm=4e64h1157.1 KiB
www.googletagmanager.com/gtag/js?id=G-PYD2Z0G3XY&cx=c&gtm=4e64h1155.6 KiB
www.googletagmanager.com/gtag/js?id=G-FCNJHL96VJ&cx=c&gtm=4e64h1151.0 KiB
/sites/default/files/styles/pod/public/hero/2022-07/Tiny-...150.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-MV8S3KQ132.1 KiB
/sites/default/files/styles/hero/public/hero/2025-04/sate...126.1 KiB
/sites/default/files/styles/pod/public/hero/2025-12/cyber...124.4 KiB

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

●Max Potential First Input Delay 90 ms
●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●JavaScript execution time 0.7 s
●Minimizes main-thread work 1.1 s
●Avoid long main-thread tasks 5 long tasks found
●Avoid non-composited animations 69 animated elements found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 120 ms
●Server Backend Latencies 70 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 40 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
○User Timing marks and measures
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.

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
Privacy Policy div.osano-cm-window > div#33409a74-3b4e-44bf-a284-c6dbb91bba1b > div.osano-cm-dialog__content > a.osano-cm-storage-policy

These are opportunities to improve the legibility of your content.

○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
●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
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
●Identical links have the same purpose.
○`[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
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○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
○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.
○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.
○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.
100

Best Practices

●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
●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.mitre.org/focus-areas/defense-intelligence/beyond-barriersLEARN MORE
www.mitre.org/our-impact/rd-centers/national-security-engineering-centerLEARN MORE
www.mitre.org/our-impact/rd-centers/center-advanced-aviation-system-developmentLearn More
www.mitre.org/our-impact/rd-centers/center-enterprise-modernizationLearn More
/our-impact/rd-centers/homeland-security-systems-engineer...Learn More
www.mitre.org/our-impact/rd-centers/health-ffrdcLearn More
www.mitre.org/our-impact/rd-centers/national-cybersecurity-ffrdcLearn More
www.mitre.org/our-impact/rd-centers/national-security-engineering-centerLearn More
www.mitre.org/our-impact/rd-centers/center-advanced-aviation-system-developmentLearn More
www.mitre.org/our-impact/rd-centers/center-enterprise-modernizationLearn More
/our-impact/rd-centers/homeland-security-systems-engineer...Learn More
www.mitre.org/our-impact/rd-centers/health-ffrdcLearn More
www.mitre.org/our-impact/rd-centers/national-cybersecurity-ffrdcLearn More
www.mitre.org/our-impact/mitre-labsLEARN MORE
www.mitre.org/our-impact/mitre-labsLearn More
www.mitre.org/our-impact/independent-researchLearn More
www.mitre.org/our-impact/policy-and-thought-leadershipLearn More
www.mitre.org/our-impact/partnershipsLearn 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
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`
○robots.txt is valid

Send Feedback