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
www.jenkins.io/images/post-images/2025/07/24/redesigning-jenkins-part-two.png	172800.0 s	895.0 KiB
www.jenkins.io/images/post-images/2025/06/Jenkins-2025-CDF-Awards.png	172800.0 s	319.9 KiB
www.jenkins.io/images/post-images/2026/04/02/redesigned-credentials-plugin.png	172800.0 s	304.3 KiB
www.jenkins.io/images/post-images/2026/04/plugin_of_the_month_april.png	172800.0 s	190.1 KiB
www.jenkins.io/images/post-images/2025/12/yeswehack-jenkins.jpg	172800.0 s	96.4 KiB
/images/post-images/2025/01/22/2025-01-22-devops-dozen-20...	172800.0 s	93.2 KiB
/u/155388736?u=55db0be9d035475d94636dc312ead3848aa650d7&v=4	300.0 s	24.2 KiB
www.jenkins.io/images/cdf/cdf-background-wide.jpg	172800.0 s	72.2 KiB
www.jenkins.io/images/avatars/stefan_spieker.png	172800.0 s	60.2 KiB
i.ytimg.com/vi_webp/_MXtbjwsz3A/sddefault.webp	7200.0 s	17.6 KiB
www.jenkins.io/images/avatars/krisstern.png	172800.0 s	42.6 KiB
www.jenkins.io/assets/bower/bootstrap/css/bootstrap.min.css	172800.0 s	42.1 KiB
www.jenkins.io/assets/bower/jquery/jquery.min.js	172800.0 s	35.6 KiB
www.jenkins.io/images/logos/needs-you/Jenkins_Needs_You-transparent.png	172800.0 s	34.0 KiB
www.jenkins.io/images/post-images/2026/04/06/jenkins-as-one-of-best-ci-tools.png	172800.0 s	27.6 KiB
www.jenkins.io/images/logos/jenkins/jenkins.png	172800.0 s	23.3 KiB
www.jenkins.io/assets/bower/bootstrap/js/bootstrap.min.js	172800.0 s	20.2 KiB
www.jenkins.io/stylesheets/styles.css	172800.0 s	16.7 KiB
www.jenkins.io/images/post-images/jenkins-is-the-way/jenkins-is-the-way.png	172800.0 s	13.3 KiB
cdn.jsdelivr.net/npm/@docsearch/js@3	604800.0 s	35.7 KiB
www.jenkins.io/images/logos/jenkins/jenkins.svg	172800.0 s	10.4 KiB
mirrors.creativecommons.org/presskit/buttons/88x31/svg/by-sa.svg	43200.0 s	6.1 KiB
www.jenkins.io/css/jenkins.css	172800.0 s	9.1 KiB
cdn.jsdelivr.net/npm/@jenkinsci/jenkins-io-components/+esm	604800.0 s	26.0 KiB
www.jenkins.io/assets/bower/@popperjs/core/umd/popper.min.js	172800.0 s	8.1 KiB
www.jenkins.io/css/font-awesome.min.css	172800.0 s	7.0 KiB
www.jenkins.io/assets/bower/anchor-js/anchor.min.js	172800.0 s	2.7 KiB
static.doubleclick.net/instream/ad_status.js	900.0 s	495 B
www.jenkins.io/js/copy-to-clipboard.js	172800.0 s	1.4 KiB
cdn.jsdelivr.net/npm/@docsearch/css@3	604800.0 s	3.7 KiB
www.jenkins.io/css/copy-to-clipboard.css	172800.0 s	854 B
www.jenkins.io/css/footer.css	172800.0 s	410 B

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
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2	40 ms

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.row > div.col-md-12 > a > img `div.row > div.col-md-12 > a > img`	www.jenkins.io/images/post-images/2025/07/24/redesigning-jenkins-part-two.png	894.5 KiB	871.3 KiB
Redesigned Credentials in Jenkins `li.app-card > a > div.app-card__preview > img`	www.jenkins.io/images/post-images/2026/04/02/redesigned-credentials-plugin.png	304.0 KiB	245.2 KiB
Plugin of the Month – April 2026: Pipeline Graph View `li.app-card > a > div.app-card__preview > img`	www.jenkins.io/images/post-images/2026/04/plugin_of_the_month_april.png	189.9 KiB	130.4 KiB
Stefan Spieker `div.app-card__details__authors > a.app-author-link > div.app-avatar > img.app-avatar__image`	www.jenkins.io/images/avatars/stefan_spieker.png	60.1 KiB	59.7 KiB
Kris Stern `div.app-card__details__authors > a.app-author-link > div.app-avatar > img.app-avatar__image`	www.jenkins.io/images/avatars/krisstern.png	42.5 KiB	42.1 KiB
JetBrains Report Highlights Jenkins as a Popular CI/CD Tool in 2026 `li.app-card > a > div.app-card__preview > img`	www.jenkins.io/images/post-images/2026/04/06/jenkins-as-one-of-best-ci-tools.png	27.5 KiB	12.7 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-0-IMG

nodeLabel: div.container > div.row > div.col-md-5 > img

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

selector: div.container > div.row > div.col-md-5 > img

snippet: <img src="/images/logos/jenkins/jenkins.svg" style="width: 256px;">

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
cdn.jsdelivr.net/npm/@docsearch/css@3	3.7 KiB	782 ms
www.jenkins.io/assets/bower/jquery/jquery.min.js	35.6 KiB	451 ms
www.jenkins.io/js/copy-to-clipboard.js	1.4 KiB
www.jenkins.io/css/jenkins.css	9.1 KiB	150 ms
www.jenkins.io/assets/bower/bootstrap/css/bootstrap.min.css	42.1 KiB	601 ms
www.jenkins.io/css/font-awesome.min.css	7.0 KiB
www.jenkins.io/stylesheets/styles.css	16.7 KiB	301 ms
www.jenkins.io/css/copy-to-clipboard.css	854 B
www.jenkins.io/css/footer.css	410 B

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

Diagnostics

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 2.1 KiB

URL	Transfer Size	Est Savings
www.jenkins.io/css/jenkins.css	9.1 KiB	2.1 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: 0.0 ms 29.6 KiB

URL	Transfer Size	Est Savings
cdn.jsdelivr.net/npm/@docsearch/js@3	35.5 KiB	29.6 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.

URL	Transfer Size
www.jenkins.io/images/post-images/2025/07/24/redesigning-jenkins-part-two.png	895.0 KiB
www.youtube.com/s/player/57fefa84/player_embed_es6.vflset/en_US/base.js	433.2 KiB
www.jenkins.io/images/post-images/2025/06/Jenkins-2025-CDF-Awards.png	319.9 KiB
www.jenkins.io/images/post-images/2026/04/02/redesigned-credentials-plugin.png	304.3 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.I-saIP3mOa8.2021...	207.3 KiB
www.jenkins.io/images/post-images/2026/04/plugin_of_the_month_april.png	190.1 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.I-saIP3mOa8.2021...	130.4 KiB
www.jenkins.io/images/post-images/2025/12/yeswehack-jenkins.jpg	96.4 KiB
/images/post-images/2025/01/22/2025-01-22-devops-dozen-20...	93.2 KiB
www.jenkins.io/images/cdf/cdf-background-wide.jpg	72.2 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
div.row > div.col-md-12 > a > img `div.row > div.col-md-12 > a > img`	www.jenkins.io/images/post-images/2025/07/24/redesigning-jenkins-part-two.png
Stefan Spieker `div.app-card__details__authors > a.app-author-link > div.app-avatar > img.app-avatar__image`	www.jenkins.io/images/avatars/stefan_spieker.png
Stefan Spieker `div.app-card__details__authors > a.app-author-link > div.app-avatar > img.app-avatar__image`	www.jenkins.io/images/avatars/stefan_spieker.png
Stefan Spieker `div.app-card__details__authors > a.app-author-link > div.app-avatar > img.app-avatar__image`	www.jenkins.io/images/avatars/stefan_spieker.png
Stefan Spieker `div.app-card__details__authors > a.app-author-link > div.app-avatar > img.app-avatar__image`	www.jenkins.io/images/avatars/stefan_spieker.png
Stefan Spieker `div.app-card__details__authors > a.app-author-link > div.app-avatar > img.app-avatar__image`	www.jenkins.io/images/avatars/stefan_spieker.png
Kris Stern `div.app-card__details__authors > a.app-author-link > div.app-avatar > img.app-avatar__image`	www.jenkins.io/images/avatars/krisstern.png
div.container > div.row > div.col-md-5 > img `div.container > div.row > div.col-md-5 > img`	www.jenkins.io/images/logos/jenkins/jenkins.svg
Jan Faracik `div.app-card__details__authors > a.app-author-link > div.app-avatar > img.app-avatar__image`
Tim Jacomb `div.app-card__details__authors > a.app-author-link > div.app-avatar > img.app-avatar__image`
Jan Faracik `div.app-card__details__authors > a.app-author-link > div.app-avatar > img.app-avatar__image`

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

●Max Potential First Input Delay 130 ms

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify JavaScript

●Reduce unused CSS

●JavaScript execution time 0.3 s

●Minimizes main-thread work 1.3 s

●Avoid long main-thread tasks 3 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 60 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 0 ms

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

○User Timing marks and measures

○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.

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#ProjectCarousel_590 > div.container > div.carousel-indicators > button.active `div#ProjectCarousel_590 > div.container > div.carousel-indicators > button.active`
div#ProjectCarousel_590 > div.container > div.carousel-indicators > button `div#ProjectCarousel_590 > div.container > div.carousel-indicators > button`
div#ProjectCarousel_590 > div.container > div.carousel-indicators > button `div#ProjectCarousel_590 > div.container > div.carousel-indicators > button`
div#ProjectCarousel_590 > div.container > div.carousel-indicators > button `div#ProjectCarousel_590 > div.container > div.carousel-indicators > button`
div#ProjectCarousel_590 > div.container > div.carousel-indicators > button `div#ProjectCarousel_590 > div.container > div.carousel-indicators > button`
div#ProjectCarousel_590 > div.container > div.carousel-indicators > button `div#ProjectCarousel_590 > div.container > div.carousel-indicators > button`
div#ProjectCarousel_590 > div.container > div.carousel-indicators > button `div#ProjectCarousel_590 > div.container > div.carousel-indicators > 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.container > div.row > div.col-md-5 > img `div.container > div.row > div.col-md-5 > img`

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.container > div.section > div.video > iframe `div.container > div.section > div.video > iframe`

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.row > div.col-md-12 > a `div.container > div.row > div.col-md-12 > a`
div.sponsors > ul > li > a `div.sponsors > ul > li > a`
div.sponsors > ul > li > a `div.sponsors > ul > li > a`
div.sponsors > ul > li > a `div.sponsors > ul > li > a`
div.sponsors > ul > li > a `div.sponsors > ul > li > a`
div.sponsors > ul > li > a `div.sponsors > ul > li > 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
Download `div.row > div.col-md-5 > div > a.app-button`
Atlassian `div.supporters > ul > li > a`
Datadog `div.supporters > ul > li > a`
DigitalOcean `div.supporters > ul > li > a`
Discourse `div.supporters > ul > li > a`
Fastly `div.supporters > ul > li > a`
IBM `div.supporters > ul > li > a`
Netlify `div.supporters > ul > li > a`
PagerDuty `div.supporters > ul > li > a`
Sentry `div.supporters > ul > li > a`
Tsinghua University `div.supporters > ul > li > a`
XMission `div.supporters > ul > li > a`
Belnet `div.supporters > ul > li > a`
RWTH Aachen University `div.supporters > ul > li > a`
Hostico `div.supporters > ul > li > a`
FreeDif `div.supporters > ul > li > a`
Servana `div.supporters > ul > li > a`
Yamagata University `div.supporters > ul > li > a`
ProthamD `div.contributor-data > div.desc-div > p > a`
contributor-spotlight `div.contributor-data > div.desc-div > p > a`

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
Continuous Integration and Continuous Delivery `div.row > div.col-md-6 > div.box > h5`
Plugin of the Month – April 2026: Pipeline Graph View `ul.app-cards > li.app-card > a > h5.app-card__title`

These are opportunities to improve keyboard navigation in your application.

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
Plugins `div.div-mar > ul.resources > li > a`
Security `div.div-mar > ul.resources > li > a`
Roadmap `div.div-mar > ul.project > li > a`
GitHub `div.div-mar > ul.project > li > a`
Forum `div.div-mar > ul.community > li > a`
Events `div.div-mar > ul.community > li > a`
LinkedIn `div.div-mar > ul.community > li > a`
Bluesky `div.div-mar > ul.community > li > a`
Mastodon `div.div-mar > ul.community > li > a`
Youtube `div.div-mar > ul.community > li > a`
Reddit `div.div-mar > ul.community > li > a`
Artwork `div.div-mar > ul.other > li > a`
Awards `div.div-mar > ul.other > li > a`

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.hydrated `html.hydrated`

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>`

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

●`[role]` values are valid

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

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

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

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

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

●Elements use only permitted ARIA attributes

●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.

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

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

●Deprecated ARIA roles were not used

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

○`[accesskey]` values are unique

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

○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

○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

○`<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

○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

○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.

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

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 destination	Link Text
devopsdozen.com/devops-dozen-2024-community-award-winners/	More info
/blog/2025/12/10/jenkins-bug-bounty-program-yeswehack-eur...	More info
contributors.jenkins.io/	More info
stories.jenkins.io/	More info
www.jenkins.io/participate/	More info

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.container > div.row > div.col-md-5 > img `div.container > div.row > div.col-md-5 > img`

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

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid