Lighthouse Desktop
· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.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.
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
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.
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.
Performance issues directly impact user engagement and conversion rates.
Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.
Performance issues directly impact user engagement and conversion rates.
Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Est Savings |
|---|---|
| www.microsoft.com/mwf/_h/v3.54/mwf.app/fonts/mwfmdl2-v3.54.woff | 30 ms |
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
Abstract 3D image with Microsoft Copilot color theme. div.grid-box > div.grid-item > a.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/fb251361-e370-444d-a14c-c26563014817 | 228.6 KiB | 203.8 KiB |
Abstract illustration featuring the icons for Microsoft 365 Copilot, Excel, Pow… div.grid-box > div.grid-item > a.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/c633c7a0-de6a-4b55-b0d4-46d8b6db9d3d | 184.9 KiB | 160.1 KiB |
Abstract banner with gradient color scheme. div.grid-box > div.grid-item > div.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/247dac36-22f2-4bae-bc2a-cb110ae4ddf0 | 146.0 KiB | 126.0 KiB |
Abstract illustration with a colorful swirling glass-like design. div.grid-box > div.grid-item > div.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/627f8c27-e629-4c04-8b11-5e365a90c3a1 | 143.3 KiB | 123.3 KiB |
Abstract rendering with a blue and purple color scheme. div.grid-box > div.grid-item > div.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/59677f0c-5eed-4229-b6c6-9981ac4f40b4 | 140.0 KiB | 119.9 KiB |
Abstract banner with gradient color scheme. div.grid-box > div.grid-item > div.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/44af1244-87dc-4391-869e-8789235f2aef | 134.4 KiB | 114.3 KiB |
Abstract banner with geometric shapes and gradient color scheme. div.grid-box > div.grid-item > div.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/f8f27713-6c24-4e93-b397-48cad77b208c | 132.3 KiB | 112.3 KiB |
Abstract colorful gradient illustration. div.grid-box > div.grid-item > div.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/226d7984-dfc2-4e6b-b911-ea5391104c32 | 130.6 KiB | 110.6 KiB |
Colorful abstract banner with geometric shapes arranged in a swirling pattern. div.grid-box > div.grid-item > div.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/a0f22b94-92af-4a92-8fab-035a1071b5fa | 123.5 KiB | 103.4 KiB |
Illustration of Create in Microsoft 365 Copilot. div.grid-box > div.grid-item > a.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/ae891560-bf9b-4117-8669-a1afa64246db | 98.5 KiB | 73.8 KiB |
Abstract 3D image with Microsoft Copilot color theme. a.fluent-component > div.CardPreview > picture > img.fluentImage | /images/en-us/fb251361-e370-444d-a14c-c26563014817?format... | 18.9 KiB | 12.2 KiB |
Outlook product logo with grey background div.grid-box > div.grid-item > a.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/e6eecd30-cc50-477a-be9c-2ddea72012fe | 25.4 KiB | 8.8 KiB |
Microsoft Copilot logo with grey background div.grid-box > div.grid-item > a.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/af6441ee-2e11-4ca8-9f1d-a1a3ae557dfc | 24.3 KiB | 7.6 KiB |
Logo of Surface devices with grey background div.grid-box > div.grid-item > a.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/58885edf-41fb-4900-9de0-953c723c9ff8 | 22.7 KiB | 6.0 KiB |
Teams product logo with grey background div.grid-box > div.grid-item > a.fluent-component > div.CardPreview | support.microsoft.com/images/en-us/960dcbae-7561-44b8-b876-55045fbb9930 | 22.1 KiB | 5.5 KiB |
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| /files/fabric-cdn-prod_20230815.002/office-ui-fabric-core... | 30.7 KiB | 30.7 KiB |
| /onerfstatics/marketingsites-neu-prod/west-european/shell... | 22.3 KiB | 20.2 KiB |
| /css/Article/article.css?v=8DPw6NyG6bvzvGENuativBPQmvOlyK... | 19.9 KiB | 19.3 KiB |
| .mectrl_resetStyle,a.mectrl_resetStyle,button.mectrl_resetStyle{height:auto;min-width:auto; … } … | 15.2 KiB | 14.9 KiB |
| .mectrl_resetStyle,a.mectrl_resetStyle,button.mectrl_resetStyle{height:auto;min-width:auto; … } … | 10.3 KiB | 10.2 KiB |
Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache
Performance issues directly impact user engagement and conversion rates.
| Failure reason | Failure type |
|---|---|
| The page has an unload handler in the main frame. | Actionable |
| Pages with cache-control:no-store header cannot enter back/forward cache. | Actionable |
| Pages whose main resource has cache-control:no-store cannot enter back/forward cache. | Not actionable |
| Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header. | Not actionable |
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| /lib/ucs/dist/ucsCreativeService.js?v=RNwXI4r6IRH1mrd2dPP... | 170.5 KiB | 70.2 KiB |
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
Performance issues directly impact user engagement and conversion rates.
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
| URL | |
|---|---|
div.theme-light > div.c-uhfh-gcontainer-st > a#uhfLogo > img.c-image div.theme-light > div.c-uhfh-gcontainer-st > a#uhfLogo > img.c-image | uhf.microsoft.com/images/microsoft/RE1Mu3b.png |
More information about the performance of your application. These numbers don't directly affect the Performance score.
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| support.microsoft.com/ | 275 ms |
| support.microsoft.com/ | 113 ms |
| support.microsoft.com/en-us | 0.0 ms |
These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS
Performance issues directly impact user engagement and conversion rates.
| Element | Layout shift score |
|---|---|
Start your Copilot journey here
Ready to try Copilot?
Compare Copilot options t… div.row > main#supArticleContent > article.ocpArticleContent > div.no-wrapper | 0.193 |
Microsoft Support
Please sign in so we may serve you better Sign in
What do y… div#ocArticle > div#ocMainContent > div.row > main#supArticleContent | 0.076 |
Sign in with Microsoft
Sign in or create an… body.supCont > div#ocBodyWrapper > div#smcTeachingCalloutPopover | 0.009 |
Microsoft Support header#document-header > div#hero-welcome > div#document_default_hero > h1#document_default_hero_heading | 0.001 |
Please sign in so we may serve you better Sign in header#document-header > div#hero-welcome > div#document_default_hero > p.subtitle | 0.000 |
All Microsoft
Sign in to your account header.c-uhfh > div.theme-light > div.c-uhfh-gcontainer-st > div.c-uhfh-actions | 0.000 |
Meet your AI assistant, ready to help you be more productive. div.grid-item > a.fluent-component > div.CardHeader-version1 > div.description | 0.000 |
Search for help div.c-uhfh-gcontainer-st > div.c-uhfh-actions > form#searchForm > button#search | 0.000 |
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.
Best Practices
General
Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.
Performance issues directly impact user engagement and conversion rates.
| Deprecation / Warning | Source |
|---|---|
| Unload event listeners are deprecated and will be removed. | /lib/oneds/dist/ms.analytics-web-4.0.2.min.js?v=O7wAAOKAV... line 5, col 47176 |
| Specifying overflow: visible on img, video and canvas tags may cause them to produce visual content outside of the element bounds. See https://github.com/WICG/shared-element-transitions/blob/main/debugging_overflow_on_images.md. | /lib/uhf/dist/uhfbundle.js?v=of4Bk4iHW2lu2zc7UaUcCo47rVLN... line 4, col 10908 |
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.
Performance issues directly impact user engagement and conversion rates.
SEO
These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.
Crawling and Indexing
Search engines 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
Performance issues directly impact user engagement and conversion rates.
| Uncrawlable Link |
|---|
Skip to main content div#headerArea > div#headerRegion > div#headerUniversalHeader > a#uhfSkipToMain |
Close callout prompt. div#smcTeachingCalloutPopover > div.popoverMessageWrapper > div.calloutDismiss > a#teachingCalloutDismiss |
To appear in search results, crawlers need access to your app.