Lighthouse Desktop

· 0 checks — Desktop 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 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:26.742 source:map[type:text value:[unattributed]]] map[reflowTime:2.043 source:map[column:3796 line:0 type:source-location url:https://opensource.org/wp-content/plugins/coblocks/dist/js/coblocks-tinyswiper-initializer.js?ver=3.1.17 urlProvider:network]] map[reflowTime:2.093 source:map[column:5625 line:0 type:source-location url:https://opensource.org/wp-content/plugins/coblocks/dist/js/coblocks-tinyswiper-initializer.js?ver=3.1.17 urlProvider:network]]]

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-0-IMG

nodeLabel: Image

path: 1,HTML,1,BODY,1,DIV,2,SECTION,0,MAIN,0,SECTION,0,ARTICLE,0,DIV,5,DIV,0,DIV,0,DIV,0,DIV,2,DIV,0,DIV,0,FIGURE,0,IMG

selector: div.swiper-slide > div.coblocks-gallery--item > figure.coblocks-gallery--figure > img.wp-image-136800

snippet: <img decoding="async" width="450" height="220" alt="Image" class="wp-image-136800" data-id="136800" data-link="https://opensource.org/sloan-1" src="https://opensource.org/wp-content/uploads/2025/06/sloan-1.svg">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

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

title: Preconnect candidates

value: No additional origins are good candidates for preconnecting

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
unpkg.com/swiper@11.2.10/swiper-bundle.min.css?ver=1750065233	5.1 KiB	246 ms
/wp-content/plugins/events-manager/includes/js/events-man...	117.7 KiB	110 ms
/wp-content/plugins/events-manager-pro/includes/js/events...	870 B
c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/button.min.js	2.4 KiB
/wp-content/plugins/events-manager/includes/css/events-ma...	49.2 KiB	165 ms
opensource.org/wp-content/plugins/syndication-links/css/syn.min.css?ver=4.5.3	32.1 KiB
/wp-content/plugins/nelio-content-premium/includes/featur...	311 B	55 ms
/wp-content/plugins/jetpack/jetpack_vendor/automattic/jet...	1.1 KiB
/wp-content/plugins/jetpack/_inc/genericons/genericons/ge...	15.9 KiB
opensource.org/wp-content/themes/osi/style.css?ver=1750065233	28.0 KiB	55 ms
/wp-content/plugins/coblocks/includes/Dependencies/GoDadd...	1.6 KiB
/wp-content/plugins/gutenberg/build/styles/components/sty...	14.4 KiB
/wp-content/plugins/complianz-gdpr/assets/css/cookieblock...	813 B
opensource.org/wp-content/plugins/wp-discourse/css/comments.css?ver=1769798368	1.0 KiB
/wp-content/plugins/jetpack/jetpack_vendor/automattic/jet...	5.1 KiB
opensource.org/wp-content/plugins/indieweb/static/css/indieweb.css?ver=5.1.1	28.9 KiB
c0.wp.com/c/6.9.4/wp-includes/css/dashicons.min.css	34.8 KiB	164 ms
opensource.org/wp-content/plugins/coblocks/dist/style-coblocks-1.css?ver=3.1.17	31.9 KiB	55 ms
/wp-content/mu-plugins/osi-editor-tweaks/build/styles/the...	1.1 KiB
/wp-content/plugins/contact-form-7/includes/css/styles.cs...	1.1 KiB
/wp-content/plugins/events-manager-pro/includes/css/event...	1.2 KiB
opensource.org/wp-content/plugins/webmention/assets/css/webmention.css?ver=5.7.0	592 B	55 ms
/wp-content/plugins/coblocks/dist/style-coblocks-extensio...	3.4 KiB	55 ms
/wp-content/plugins/coblocks/dist/style-coblocks-animatio...	1.0 KiB
c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/resizable.min.js	5.8 KiB
c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/dialog.min.js	4.2 KiB
c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/checkboxradio.min.js	1.8 KiB
/wp-content/plugins/timeline-block/includes/cool-timeline...	4.0 KiB
c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery.min.js	31.1 KiB	82 ms
c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/controlgroup.min.js	1.9 KiB
c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/draggable.min.js	5.3 KiB
c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/datepicker.min.js	11.4 KiB
c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/core.min.js	7.5 KiB
c0.wp.com/c/6.9.4/wp-includes/js/mediaelement/mediaelementplayer-legacy.min.css	2.9 KiB	233 ms
c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/sortable.min.js	7.1 KiB
c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/mouse.min.js	1.5 KiB
c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery-migrate.min.js	5.3 KiB
c0.wp.com/c/6.9.4/wp-includes/js/mediaelement/wp-mediaelement.min.css	1.4 KiB
/wp-content/plugins/gutenberg/build/styles/block-library/...	18.3 KiB	110 ms
/wp-content/plugins/jetpack/jetpack_vendor/automattic/jet...	1.1 KiB

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
opensource.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?	14400.0 s	12.0 KiB

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
div.wp-block-columns > div.wp-block-column > figure.wp-block-image > img.wp-image-136872 `div.wp-block-columns > div.wp-block-column > figure.wp-block-image > img.wp-image-136872`	/opensource.org/wp-content/uploads/2025/06/image-1.png?w=...	28.3 KiB	14.8 KiB
Open Source Initiative `div.header--inner > div.site-branding > a > img.header-logo`	/opensource.org/wp-content/uploads/2023/03/cropped-OSI-ho...	12.3 KiB	9.6 KiB

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

Diagnostics

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 14.2 KiB

URL	Transfer Size	Est Savings
/wp-content/plugins/events-manager/includes/js/events-man...	117.5 KiB	14.2 KiB

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: 220 ms 212.2 KiB

URL	Transfer Size	Est Savings
/wp-content/plugins/events-manager/includes/css/events-ma...	49.0 KiB	48.9 KiB
opensource.org/wp-content/plugins/syndication-links/css/syn.min.css?ver=4.5.3	32.0 KiB	32.0 KiB
opensource.org/wp-content/plugins/coblocks/dist/style-coblocks-1.css?ver=3.1.17	31.8 KiB	31.3 KiB
opensource.org/wp-content/plugins/indieweb/static/css/indieweb.css?ver=5.1.1	28.8 KiB	28.8 KiB
opensource.org/wp-content/themes/osi/style.css?ver=1750065233	27.8 KiB	23.6 KiB
/wp-content/plugins/gutenberg/build/styles/block-library/...	18.1 KiB	17.7 KiB
/wp-content/plugins/jetpack/_inc/genericons/genericons/ge...	15.7 KiB	15.7 KiB
/wp-content/plugins/gutenberg/build/styles/components/sty...	14.3 KiB	14.2 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: 90 ms 148.1 KiB

URL	Transfer Size	Est Savings
/wp-content/plugins/events-manager/includes/js/events-man...	117.4 KiB	107.1 KiB
unpkg.com/swiper@11/swiper-bundle.min.js?ver=1750065233	42.1 KiB	41.0 KiB

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 8.6 KiB

URL	Transfer Size	Est Savings
opensource.org/wp-content/themes/osi/style.css?ver=1750065233	28.0 KiB	4.1 KiB
opensource.org/wp-content/plugins/syndication-links/css/syn.min.css?ver=4.5.3	32.1 KiB	2.3 KiB
opensource.org/wp-content/plugins/indieweb/static/css/indieweb.css?ver=5.1.1	28.9 KiB	2.2 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
ul.columns-2 > li.wp-block-post > figure.wp-block-post-featured-image > img.attachment-post-thumbnail `ul.columns-2 > li.wp-block-post > figure.wp-block-post-featured-image > img.attachment-post-thumbnail`	/opensource.org/wp-content/uploads/2026/04/osi_leader_dua...
ul.columns-2 > li.wp-block-post > figure.wp-block-post-featured-image > img.attachment-post-thumbnail `ul.columns-2 > li.wp-block-post > figure.wp-block-post-featured-image > img.attachment-post-thumbnail`	/opensource.org/wp-content/uploads/2026/04/osi_leader_dua...
Members Newsletter `ul.columns-2 > li.wp-block-post > figure.wp-block-post-featured-image > img.attachment-post-thumbnail`	/opensource.org/wp-content/uploads/2024/08/image-1.png?re...
ul.columns-2 > li.wp-block-post > figure.wp-block-post-featured-image > img.attachment-post-thumbnail `ul.columns-2 > li.wp-block-post > figure.wp-block-post-featured-image > img.attachment-post-thumbnail`	/opensource.org/wp-content/uploads/2026/02/mou_osi_aboutc...
Open Source Initiative `div.header--inner > div.site-branding > a > img.header-logo`	/opensource.org/wp-content/uploads/2023/03/cropped-OSI-ho...

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

●Time to Interactive 1.4 s

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Max Potential First Input Delay 30 ms

●Avoids enormous network payloads Total size was 1,115 KiB

●JavaScript execution time 0.1 s

●Minimizes main-thread work 0.5 s

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 20 ms

●Server Backend Latencies 590 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 50 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○User Timing marks and measures

○Avoid long main-thread tasks

○Avoid non-composited animations

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

A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. Learn more about the `tabindex` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`
Image `div.has-carousel > div.swiper-wrapper > div.swiper-slide > div.coblocks-gallery--item`

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
We have released the first stable version of the Definition. `article#post-136840 > div.entry-content > section.wp-block-group > h4.wp-block-heading`

These are opportunities to improve keyboard navigation in your application.

Names and labels

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#newsletter > p > span.wpcf7-form-control-wrap > input.wpcf7-form-control `div#newsletter > p > span.wpcf7-form-control-wrap > input.wpcf7-form-control`

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.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

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

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

●Image elements have `[alt]` attributes

●Input buttons have discernible text.

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

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

●ARIA attributes are used as specified for the element's role

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

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

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

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

●Links are distinguishable without relying on color.

●Links have a discernible name

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

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

●Touch targets have sufficient size and spacing.

●`[lang]` attributes have a valid value

●Document has a main landmark.

●Deprecated ARIA roles were not used

○`[accesskey]` values are unique

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

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○Buttons have an accessible name

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○`<input type="image">` elements have `[alt]` text

○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.

○`<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.

○Identical links have the same purpose.

○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

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	opensource.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	opensource.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	opensource.org/cdn-cgi/challenge-platform/scripts/jsd/main.js

●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

●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 clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

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

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`