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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.

38

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
www.linuxfoundation.org/_hcms/forms/v2.js300.0 s200.6 KiB
lfx-segment.platform.linuxfoundation.org/latest/lfx-segment-analytics.min.js0.0 ms82.9 KiB
/hs-fs/hubfs/oss-elc-na-2026-Social-Snackable.png?width=1...1209600.0 s277.7 KiB
js.hubspot.com/web-interactives-embed.js600.0 s28.2 KiB
/hubfs/8112310/52214652141_9442befa2e_o 1.png1209600.0 s259.8 KiB
d2c7xlmseob604.cloudfront.net/tracker.min.js0.0 ms24.8 KiB
www.linuxfoundation.org/hs-fs/hubfs/DSC_8053.jpg?width=1000&name=DSC_8053.jpg1209600.0 s202.3 KiB
/hubfs/8112310/Web Assets_Open Source ROI Survey_Report_T...1209600.0 s196.9 KiB
cmp.osano.com/16A0DbT9yDNIaQkvZ/af2b9f1f-3ac7-4a18-a99a-e487d04f08e6/osano-ui.js86400.0 s26.8 KiB
/huawei-technologies-co-ltd.svg0.0 ms9.1 KiB
/microsoft-corporation.svg0.0 ms6.7 KiB
lf-master-organization-logos-prod.s3.us-east-2.amazonaws.com/fujitsu-limited.svg0.0 ms6.1 KiB
/hs-fs/hubfs/46304026842_d93be3ca4e_o 1.png?width=512&hei...1209600.0 s59.7 KiB
www.linuxfoundation.org/hubfs/openssf-horizontal-color.png1209600.0 s54.2 KiB
/samsung_electronics_co._ltd._1700625975816_0014100000Te0...0.0 ms4.8 KiB
www.linuxfoundation.org/hubfs/lfnetworking-stacked-color%20(1).png1209600.0 s47.8 KiB
lf-platform-documents-prod.s3.amazonaws.com/hitachi-ltd.svg0.0 ms4.4 KiB
www.linuxfoundation.org/_hcms/googlefonts/Open_Sans/regular.woff21209600.0 s44.8 KiB
www.linuxfoundation.org/_hcms/googlefonts/Roboto_Slab/700.woff21209600.0 s43.3 KiB
www.linuxfoundation.org/_hcms/googlefonts/Open_Sans/700.woff21209600.0 s43.0 KiB
lf-master-organization-logos-prod.s3.us-east-2.amazonaws.com/qualcomm-inc.svg0.0 ms4.2 KiB
www.linuxfoundation.org/_hcms/googlefonts/Roboto_Slab/300.woff21209600.0 s42.3 KiB
www.linuxfoundation.org/_hcms/googlefonts/Roboto_Slab/regular.woff21209600.0 s41.6 KiB
lf-master-organization-logos-prod.s3.us-east-2.amazonaws.com/ericsson-ab.svg0.0 ms3.8 KiB
/meta_platforms_inc_1714768245542_0014100000TdzwSAAR.svg0.0 ms3.8 KiB
js.hsadspixel.net/pixels.js600.0 s3.9 KiB
lf-master-organization-logos-prod.s3.us-east-2.amazonaws.com/google-llc.svg0.0 ms3.5 KiB
www.linuxfoundation.org/hubfs/os-c.svg1209600.0 s28.7 KiB
/oracle-america-inc.svg0.0 ms2.4 KiB
/jmertic/lf-landscape/refs/heads/main/images/red-hat-inc.svg300.0 s2.2 KiB
/nec_corporation_1744878106355_0014100000Te0QfAAJ.svg0.0 ms1.6 KiB
www.linuxfoundation.org/hs/scriptloader/8112310.js?businessUnitId=090.0 s1.5 KiB
/hubfs/hub_generated/template_assets/1/80445472785/177499...1209600.0 s12.0 KiB
/hs-fs/hubfs/lf_sustainability_banner.png?width=893&heigh...1209600.0 s9.7 KiB
www.linuxfoundation.org/hubfs/cdsc.svg1209600.0 s8.3 KiB
/hubfs/hub_generated/template_assets/1/80245626652/177499...1209600.0 s8.3 KiB
www.linuxfoundation.org/hubfs/Tux-flat-version.png1209600.0 s8.0 KiB
www.linuxfoundation.org/hubfs/OpenJS%20Logo.png1209600.0 s7.8 KiB
www.linuxfoundation.org/hubfs/decentralized-identity-foundation-dif.svg1209600.0 s7.4 KiB
/hubfs/hub_generated/template_assets/1/55376723732/174307...1209600.0 s6.8 KiB
www.linuxfoundation.org/hubfs/riscvlogo.png1209600.0 s6.8 KiB
www.linuxfoundation.org/hubfs/lf-security-color.svg1209600.0 s5.3 KiB
www.linuxfoundation.org/hubfs/chipsalliance-color.svg1209600.0 s4.9 KiB
www.linuxfoundation.org/hubfs/odpi-egeria.svg1209600.0 s4.8 KiB
www.linuxfoundation.org/hubfs/pixhawk.jpg1209600.0 s4.7 KiB
www.linuxfoundation.org/hubfs/C2PA.svg1209600.0 s4.6 KiB
/hubfs/hub_generated/module_assets/1/76935915621/17431386...1209600.0 s4.4 KiB
www.linuxfoundation.org/hubfs/clusterduck.svg1209600.0 s4.3 KiB
www.linuxfoundation.org/hubfs/spdx-color.svg1209600.0 s4.1 KiB
www.linuxfoundation.org/hubfs/margo_black.svg1209600.0 s3.1 KiB
www.linuxfoundation.org/hubfs/cncf-color-3.png1209600.0 s3.1 KiB
/hubfs/hub_generated/module_assets/1/83221544887/17431386...1209600.0 s3.0 KiB
www.linuxfoundation.org/hubfs/openpowerfoundation.svg1209600.0 s2.7 KiB
www.linuxfoundation.org/hubfs/open19.svg1209600.0 s2.6 KiB
www.linuxfoundation.org/hubfs/marquez.svg1209600.0 s2.5 KiB
www.linuxfoundation.org/hubfs/openbtes.png1209600.0 s2.5 KiB
www.linuxfoundation.org/hubfs/jdf3mf.svg1209600.0 s2.4 KiB
www.linuxfoundation.org/hubfs/aomedia_color.svg1209600.0 s2.3 KiB
/hubfs/hub_generated/template_assets/1/77283004266/177499...1209600.0 s2.3 KiB
www.linuxfoundation.org/hubfs/lfai-milvus.png1209600.0 s2.2 KiB
www.linuxfoundation.org/hubfs/LF%20Logo%20White.svg1209600.0 s1.9 KiB
www.linuxfoundation.org/hubfs/finos-horizontal-color%201.png1209600.0 s1.9 KiB
/hubfs/hub_generated/module_assets/1/77362524751/17539764...1209600.0 s1.5 KiB
/hubfs/hub_generated/module_assets/1/77362524751/17539764...1209600.0 s1.5 KiB
/hubfs/hub_generated/module_assets/1/98141763891/17431387...1209600.0 s1.4 KiB
/hubfs/hub_generated/module_assets/1/98141763891/17431387...1209600.0 s1.4 KiB
/hubfs/hub_generated/module_assets/1/83221544887/17431386...1209600.0 s1.2 KiB
/hubfs/hub_generated/template_assets/1/77282240621/177499...1209600.0 s1.2 KiB
/hubfs/hub_generated/module_assets/1/83269086742/17431386...1209600.0 s1.1 KiB
/hubfs/hub_generated/module_assets/1/83269086742/17431386...1209600.0 s930 B
/hubfs/hub_generated/module_assets/1/82818538563/17431386...1209600.0 s796 B
/hubfs/hub_generated/module_assets/1/83223551658/17431386...1209600.0 s682 B
/hubfs/hub_generated/module_assets/1/83161917017/17683245...1209600.0 s564 B
/hubfs/hub_generated/module_assets/1/83223551786/17431386...1209600.0 s511 B
/hubfs/hub_generated/template_assets/1/77283435922/177499...1209600.0 s0 B
/hubfs/hub_generated/template_assets/1/85121828485/177499...1209600.0 s0 B
/hubfs/hub_generated/template_assets/1/77282239896/177499...1209600.0 s0 B
www.linuxfoundation.org/hs/scriptloader/8112310.js?businessUnitId=090.0 s0 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:30.605 source:map[column:27323 line:2 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js 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:48.399 source:map[type:text value:[unattributed]]] map[reflowTime:5.925 source:map[column:84992 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js urlProvider:network]] map[reflowTime:0.376 source:map[column:50335 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js urlProvider:network]] map[reflowTime:0.197 source:map[column:50393 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js urlProvider:network]] map[reflowTime:0.185 source:map[column:50457 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js urlProvider:network]] map[reflowTime:2.816 source:map[column:49637 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js urlProvider:network]] map[reflowTime:20.104 source:map[column:49615 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js urlProvider:network]] map[reflowTime:0.272 source:map[column:51395 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js urlProvider:network]] map[reflowTime:0.73 source:map[column:83946 line:1 type:source-location url:https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.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.

URLResource SizeEst Savings
oss-elc-na-2026-Social-Snackable div.banner-img-mask__container > div.col6 > div.banner-img-mask__image > img
/hs-fs/hubfs/oss-elc-na-2026-Social-Snackable.png?width=1...276.8 KiB265.5 KiB
DSC_8053 div.col6 > div.two-col-blocks__block-img-mask > div.two-col-blocks__block-img > img
www.linuxfoundation.org/hs-fs/hubfs/DSC_8053.jpg?width=1000&name=DSC_8053.jpg201.4 KiB192.2 KiB
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
www.linuxfoundation.org/hubfs/openssf-horizontal-color.png53.3 KiB52.9 KiB
46304026842_d93be3ca4e_o 1 div.col6 > div.two-col-blocks__block-img-mask > div.two-col-blocks__block-img > img
/hs-fs/hubfs/46304026842_d93be3ca4e_o 1.png?width=512&hei...58.8 KiB52.5 KiB
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
www.linuxfoundation.org/hubfs/lfnetworking-stacked-color%20(1).png46.9 KiB46.9 KiB
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
www.linuxfoundation.org/hubfs/Tux-flat-version.png7.1 KiB6.6 KiB
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
www.linuxfoundation.org/hubfs/OpenJS%20Logo.png6.8 KiB6.5 KiB

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.

URLTransfer SizeDuration
/hubfs/hub_generated/module_assets/1/83223551658/17431386...682 B
lfx-segment.platform.linuxfoundation.org/latest/lfx-segment-analytics.min.js82.9 KiB2.1 s
cmp.osano.com/16A0DbT9yDNIaQkvZ/af2b9f1f-3ac7-4a18-a99a-e487d04f08e6/osano.js42.1 KiB1.7 s
/hubfs/hub_generated/template_assets/1/55376723732/174307...6.8 KiB
/hubfs/hub_generated/module_assets/1/82818538563/17431386...796 B
/hubfs/hub_generated/module_assets/1/83269086742/17431386...930 B
/hubfs/hub_generated/module_assets/1/77362524751/17539764...1.5 KiB
/hubfs/hub_generated/module_assets/1/83221544887/17431386...1.2 KiB

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

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 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: 750 ms 231.1 KiB
URLTransfer SizeEst Savings
www.linuxfoundation.org/_hcms/forms/v2.js193.0 KiB76.6 KiB
www.googletagmanager.com/gtag/js?id=G-FBYHX832ZD&cx=c&gtm=4e6460156.7 KiB64.9 KiB
www.googletagmanager.com/gtm.js?id=GTM-WWBXMJK136.0 KiB62.0 KiB
lfx-segment.platform.linuxfoundation.org/latest/lfx-segment-analytics.min.js82.0 KiB27.5 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
Unattributable1.2 s218 ms0.0 ms
www.linuxfoundation.org/1.1 s54 ms6.0 ms
cmp.osano.com/16A0DbT9yDNIaQkvZ/af2b9f1f-3ac7-4a18-a99a-e487d04f08e6/osano.js790 ms697 ms14 ms
cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js599 ms295 ms7.3 ms
www.linuxfoundation.org/_hcms/forms/v2.js529 ms280 ms57 ms
www.googletagmanager.com/gtag/js?id=G-FBYHX832ZD&cx=c&gtm=4e6460308 ms254 ms48 ms
www.googletagmanager.com/gtm.js?id=GTM-WWBXMJK258 ms214 ms40 ms
d2c7xlmseob604.cloudfront.net/tracker.min.js132 ms120 ms12 ms
lfx-segment.platform.linuxfoundation.org/latest/lfx-segment-analytics.min.js126 ms95 ms26 ms
www.linuxfoundation.org/hs/hsstatic/HubspotToolsMenu/static-1.640/js/index.js75 ms5.5 ms33 ms
cmp.osano.com/16A0DbT9yDNIaQkvZ/af2b9f1f-3ac7-4a18-a99a-e487d04f08e6/osano-ui.js71 ms39 ms16 ms
js.hubspot.com/web-interactives-embed.js60 ms48 ms9.1 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 Evaluation2.4 s
Other1.5 s
Style & Layout983 ms
Script Parsing & Compilation313 ms
Rendering206 ms
Parse HTML & CSS114 ms
Garbage Collection22 ms

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 7.2 KiB
URLTransfer SizeEst Savings
cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.9.0/slick.js12.5 KiB5.1 KiB
/hubfs/hub_generated/template_assets/1/80445472785/177499...11.1 KiB2.1 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
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
www.linuxfoundation.org/hubfs/lfnetworking-stacked-color%20(1).png
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
www.linuxfoundation.org/hubfs/openssf-horizontal-color.png
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
www.linuxfoundation.org/hubfs/OpenJS%20Logo.png
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
www.linuxfoundation.org/hubfs/Tux-flat-version.png
DSC_8053 div.col6 > div.two-col-blocks__block-img-mask > div.two-col-blocks__block-img > img
www.linuxfoundation.org/hs-fs/hubfs/DSC_8053.jpg?width=1000&name=DSC_8053.jpg
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
www.linuxfoundation.org/hubfs/cncf-color-3.png
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
www.linuxfoundation.org/hubfs/finos-horizontal-color%201.png
div.header__row > div.header_branding > a > img div.header__row > div.header_branding > a > img
www.linuxfoundation.org/hubfs/LF%20Logo%20White.svg
LF Logo White div.footer__left > div.footer__logo > a > img
www.linuxfoundation.org/hubfs/LF%20Logo%20White.svg

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

●Layout shift culprits
●Document request latency
●Optimize DOM size
●Font display
●LCP breakdown
●Optimize viewport for mobile
●Minify CSS
●Reduce unused CSS
●Avoids enormous network payloads Total size was 2,379 KiB
●User Timing marks and measures 5 user timings
●Avoid long main-thread tasks 20 long tasks found
●Avoid non-composited animations 2 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 180 ms
●Server Backend Latencies 260 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Avoid multiple page redirects
●Initial server response time was short Root document took 40 ms
○INP breakdown
○LCP request discovery
○Avoid large layout shifts
76

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

Each ARIA `role` supports a specific subset of `aria-*` attributes. Mismatching these invalidates the `aria-*` attributes. Learn how to match ARIA attributes to their roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
PROJECTS div.footer__right-content-menu > div.footer__row-list > div.menu-group > div.child-menu_links
NEWSROOM div.footer__right-content-menu > div.footer__row-list > div.menu-group > div.child-menu_links
LF RESEARCH div.footer__right-content-menu > div.footer__row-list > div.menu-group > div.child-menu_links
LFX PLATFORM div.footer__right-content-menu > div.footer__row-list > div.menu-group > div.child-menu_links
RESOURCES div.footer__right-content-menu > div.footer__row-list > div.menu-group > div.child-menu_links
LF EVENTS div.footer__right-content-menu > div.footer__row-list > div.menu-group > div.child-menu_links
LF EDUCATION div.footer__right-content-menu > div.footer__row-list > div.menu-group > div.child-menu_links

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.

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.header__row > div.header_content > div.header-left > button.burger-button div.header__row > div.header_content > div.header-left > button.burger-button

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.header__row > div.header_branding > a > img div.header__row > div.header_branding > a > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > 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
header#js-top-header > div.header__row > div.header_branding > a header#js-top-header > div.header__row > div.header_branding > a
div.two-col-blocks__inner-content > div.two-col-blocks__supporting-content > p > a div.two-col-blocks__inner-content > div.two-col-blocks__supporting-content > p > a
div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image
div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image
div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image
div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image
div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image
div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image div.projects-tabs-col__container > div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image
div.footer__container > div.footer__left > div.footer__social-links > a div.footer__container > div.footer__left > div.footer__social-links > a
div.footer__container > div.footer__left > div.footer__social-links > a div.footer__container > div.footer__left > div.footer__social-links > a
div.footer__container > div.footer__left > div.footer__social-links > a div.footer__container > div.footer__left > div.footer__social-links > a
div.footer__container > div.footer__left > div.footer__social-links > a div.footer__container > div.footer__left > div.footer__social-links > a
div.footer__container > div.footer__left > div.footer__social-links > a div.footer__container > div.footer__left > div.footer__social-links > a

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.

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#1f02a6bf-3841-4e67-8d91-9a16514f037a > div.osano-cm-dialog__content > a.osano-cm-storage-policy
Storage Preferences div#1f02a6bf-3841-4e67-8d91-9a16514f037a > div.osano-cm-dialog__content > p.osano-cm-content__drawer-links > a.osano-cm-drawer-links__link
Save div.osano-cm-window > div#1f02a6bf-3841-4e67-8d91-9a16514f037a > div.osano-cm-dialog__buttons > button.osano-cm-save
Accept All div.osano-cm-window > div#1f02a6bf-3841-4e67-8d91-9a16514f037a > div.osano-cm-dialog__buttons > button.osano-cm-accept-all
Reject Non-Essential div.osano-cm-window > div#1f02a6bf-3841-4e67-8d91-9a16514f037a > div.osano-cm-dialog__buttons > button.osano-cm-denyAll
LEARN MORE div.hero-img-mask__container > div.col6 > div.hero-img-mask__cta > a.hs-button
open source projects  div.counter-col__inner > div.counter-col__counter > div.counter-col__content > a.counter-col__link
developers trained  div.counter-col__inner > div.counter-col__counter > div.counter-col__content > a.counter-col__link
developers contributing code  div.counter-col__inner > div.counter-col__counter > div.counter-col__content > a.counter-col__link
lines of code added weekly  div.counter-col__inner > div.counter-col__counter > div.counter-col__content > a.counter-col__link
contributing organizations  div.counter-col__inner > div.counter-col__counter > div.counter-col__content > a.counter-col__link
upcoming events  div.counter-col__inner > div.counter-col__counter > div.counter-col__content > a.counter-col__link
standards and specifications  div.counter-col__inner > div.counter-col__counter > div.counter-col__content > a.counter-col__link
Meet our members. div.slider > div.slider > div.slider > a
Open Hardware div.projects-tabs-col > ul.filter-menu > li.filter-menu__link > label
Open Standards div.projects-tabs-col > ul.filter-menu > li.filter-menu__link > label
Open Data div.projects-tabs-col > ul.filter-menu > li.filter-menu__link > label
See all open software projects. div.projects-tabs-col__rich-text > div.projects-tabs-col__rich-link > p > a
SEE ALL PROJECTS section.section--widget_1662844101751 > div.projects-tabs-col > div.align--center > a.projects-tabs-col__button
Learn more p > span > strong > a
Learn more p > span > strong > a
SAVE NOW div.simple-img-mask__container > div.col6 > div.simple-img-mask__cta > a.hs-button
REGISTER NOW div.banner-img-mask__container > div.col6 > div.banner-img-mask__cta > a.hs-button
READ NOW div.banner-img-mask__container > div.col6 > div.banner-img-mask__cta > a.hs-button
NEWSROOM div.resources-cards > div.section-title__wrapper > div.section-title__link > a.section-title__link-text
fieldset.form-columns-3 > div.hs_firstname > div.input > input#firstname-e5c83800-1206-402c-9050-decfe094cca8_5878 fieldset.form-columns-3 > div.hs_firstname > div.input > input#firstname-e5c83800-1206-402c-9050-decfe094cca8_5878
fieldset.form-columns-3 > div.hs_lastname > div.input > input#lastname-e5c83800-1206-402c-9050-decfe094cca8_5878 fieldset.form-columns-3 > div.hs_lastname > div.input > input#lastname-e5c83800-1206-402c-9050-decfe094cca8_5878
fieldset.form-columns-3 > div.hs_email > div.input > input#email-e5c83800-1206-402c-9050-decfe094cca8_5878 fieldset.form-columns-3 > div.hs_email > div.input > input#email-e5c83800-1206-402c-9050-decfe094cca8_5878
Privacy Policy div.hs-richtext > p > u > a
form#hsForm_e5c83800-1206-402c-9050-decfe094cca8_5878 > div.hs_submit > div.actions > input.hs-button form#hsForm_e5c83800-1206-402c-9050-decfe094cca8_5878 > div.hs_submit > div.actions > input.hs-button

These are opportunities to improve the legibility of your content.

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
LF EDUCATION div.simple-img-mask__wrapper > div.simple-img-mask__container > div.col6 > h6.simple-img-mask__pre-title
May 18-20, 2026 | Minneapolis, Minnesota div.banner-img-mask__container > div.col6 > div.banner-img-mask__supporting-content > h4
FEATURED RESEARCH div.banner-img-mask__wrapper > div.banner-img-mask__container > div.col6 > h6.banner-img-mask__pre-title
ANNOUNCEMENT div.resources-cards__container > a.box-widget_1661719294883 > div.resources-cards__content > h6.resources-cards__tagline
ANNOUNCEMENT div.resources-cards__container > a.box-widget_1661719294883 > div.resources-cards__content > h6.resources-cards__tagline
ANNOUNCEMENT div.resources-cards__container > a.box-widget_1661719294883 > div.resources-cards__content > h6.resources-cards__tagline

These are opportunities to improve keyboard navigation in your application.

Internationalization and localization

If a page doesn't specify a `lang` attribute, a screen reader assumes that the page is in the default language that the user chose when setting up the screen reader. If the page isn't actually in the default language, then the screen reader might not announce the page's text correctly. Learn more about the `lang` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html html

These are opportunities to improve the interpretation of your content by users in different locales.

○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-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
●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
●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
●Links are distinguishable without relying on color.
●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.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●All heading elements contain content.
●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
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has a valid value for its `[lang]` attribute
○`<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>`.
○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.
96

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.linuxfoundation.org/ line 293, col 2
ReferenceError: $ is not defined at https://www.linuxfoundation.org/:294:3
cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js line 1, col 28759
Uncaught TypeError: Cannot read properties of undefined (reading 'top')

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.

URLMap URL
www.linuxfoundation.org/_hcms/forms/v2.js
lfx-segment.platform.linuxfoundation.org/latest/lfx-segment-analytics.min.jslfx-segment.platform.linuxfoundation.org/latest/lfx-segment-analytics.min.js.map
cmp.osano.com/16A0DbT9yDNIaQkvZ/af2b9f1f-3ac7-4a18-a99a-e487d04f08e6/osano.js/16A0DbT9yDNIaQkvZ/af2b9f1f-3ac7-4a18-a99a-e487d04f08e6/o...
cmp.osano.com/16A0DbT9yDNIaQkvZ/af2b9f1f-3ac7-4a18-a99a-e487d04f08e6/osano-ui.js/16A0DbT9yDNIaQkvZ/af2b9f1f-3ac7-4a18-a99a-e487d04f08e6/o...
www.linuxfoundation.org/hs/hsstatic/HubspotToolsMenu/static-1.640/js/index.jsstatic.hsappstatic.net/HubspotToolsMenu/static-1.640/js/index.js.map
js.hsadspixel.net/pixels.js/adsscriptloaderstatic/static-1.3012/bundles/pixels-relea...
●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 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 clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
77

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.linuxfoundation.org/projects?hsLang=enLEARN MORE
www.linuxfoundation.org/about/join?hsLang=enLEARN MORE
www.linuxfoundation.org/projects/hosting?hsLang=enLEARN MORE
www.linuxfoundation.org/lf-security?hsLang=enLearn more
www.linuxfoundation.org/projects/sustainability?hsLang=enLearn more

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.header__row > div.header_branding > a > img div.header__row > div.header_branding > a > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.slick-track > div.slick-slide > div > img div.slick-track > div.slick-slide > div > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img
div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img div.flex-row > div.projects-tabs-col__wrapper-item > a.project__image > img

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

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
div.two-col-blocks__inner-content > div.two-col-blocks__supporting-content > p > a div.two-col-blocks__inner-content > div.two-col-blocks__supporting-content > p > a

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

○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
●robots.txt is valid
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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