Lighthouse Mobile
· 0 checks — Mobile 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.
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.
Performance issues directly impact user engagement and conversion rates.
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.
| URL | Transfer Size | Duration |
|---|---|---|
| www.xbox.com/en-US/home/js/allContent2.js | 64.1 KiB | 1.4 s |
| assets-www.xbox.com/legacy/shell/js/legacylayout.min.js | 42.5 KiB | 1.7 s |
| /xbox-web/static/css/mwf/west-european/green/mwf-main.min... | 85.3 KiB | 460 ms |
| www.xbox.com/en-US/home/js/allHeroes2.js | 16.4 KiB | 452 ms |
| www.xbox.com/en-US/home/js/contentPop2.js | 20.1 KiB | 302 ms |
| /onerfstatics/marketingsites-eas-prod/west-european/shell... | 23.1 KiB | 1.1 s |
| cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js | 27.5 KiB | 1.3 s |
| www.xbox.com/en-US/home/js/lazyload.js | 1.5 KiB | |
| assets-xbxweb.xbox.com/xbox-web/static/css/3772.a18935f8.css | 22.4 KiB | 1.1 s |
| assets-xbxweb.xbox.com/xbox-web/static/css/6923.04468c8b.css | 27.5 KiB | 614 ms |
| assets-xbxweb.xbox.com/xbox-web/static/css/client.a9501186.css | 26.7 KiB | 307 ms |
| assets-xbxweb.xbox.com/xbox-web/static/css/ContentPage.a1efaec3.chunk.css | 8.6 KiB | 153 ms |
| assets-xbxweb.xbox.com/xbox-web/static/css/4278.aafcdaf5.css | 4.3 KiB | 153 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 | |
|---|---|---|---|
Sierra holds on to a rope, carrying her away from a blast of energy. li#hero-2 > section.m-hero-item > picture.c-image > img | /assets/5a/4f/5a4fbdc7-b443-4462-80ca-2e2faf11c617.jpg?n=... | 413.5 KiB | 283.9 KiB |
Futuristic city scene with neon lights, abstract blue and orange shapes and a t… ul > li#zoomImg3-parent > picture.c-image > img | /assets/8e/76/8e76da06-7d5b-40ed-b947-076826cc3d89.jpg?n=... | 319.8 KiB | 275.9 KiB |
A robot with a gleaming visor holds a rifle as a fleet of spacecraft flies over… section.m-image-intro > a.white-c > picture.c-image > img | /assets/5a/96/5a9622ee-fb6a-4444-9ade-9487bd6bc68a.jpg?n=... | 249.3 KiB | 161.1 KiB |
A wristwatch with the number 2039 displayed. section.m-image-intro > a.lightboxToutTab > picture.c-image > img | /assets/28/37/28373de2-407d-4e2a-94e2-6a805437e192.jpg?n=... | 216.9 KiB | 128.7 KiB |
Imagery from multiple games available or coming soon with Xbox Game Pass Ultima… li#zoomImg1-parent > a.lightboxToutTab > picture.c-image > img | /assets/4d/72/4d728a5f-de3a-4865-8aa8-34dfabf76c36.jpg?n=... | 170.1 KiB | 126.2 KiB |
Brightly coloured anamorphic clay pots run across a cobblestone street with a w… ul > li#zoomImg2-parent > picture.c-image > img | /assets/d0/92/d0923375-699c-4ac5-abe6-335b7aa26cf6.jpg?n=... | 162.1 KiB | 118.1 KiB |
The ROG Xbox Ally floating with the dashboard open section.m-image-intro > a.lightboxToutTab > picture.c-image > img | /assets/e7/cb/e7cbf8ee-16e8-45d9-8a69-f1c37c0b2fba.jpg?n=... | 116.0 KiB | 68.5 KiB |
A group of devices li.fullTile > section.m-hero-item > picture > img | /assets/0c/50/0c501c35-ed71-475b-bbc3-bae23029be2e.jpg?n=... | 100.3 KiB | 57.8 KiB |
An operator wearing a gas mask and bomber jacket. li#hero-1 > section.m-hero-item > picture.c-image > img | /assets/16/6e/166e1965-a049-43f0-8f9a-118fe7799217.jpg?n=... | 126.6 KiB | 14.7 KiB |
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
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.
Performance issues directly impact user engagement and conversion rates.
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 |
|---|---|
| xbox.com/ | 1.4 s |
| www.xbox.com/ | 769 ms |
| www.xbox.com/en-HK/ | 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 |
|---|---|
Xbox First Look: METRO 2039
Join us on 17 April at 1:00 AM HKT for a first loo… div#bodycolumn > div#BodyContent > div > div#ContentBlockList_5 | 0.639 |
GAME PASS
GAMES
DEVICES
ACCESSORIES
DEALS
SIGN IN div > div#ContentBlockList_4 > div > div.icons | 0.004 |
GAME PASS
GAMES
DEVICES
ACCESSORIES
DEALS
SIGN IN div > div#ContentBlockList_4 > div > div.icons | 0.003 |
div.theme-light > div.c-uhfh-gcontainer-st > button.c-action-trigger > ::before div.theme-light > div.c-uhfh-gcontainer-st > button.c-action-trigger > ::before | 0.000 |
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.
Performance issues directly impact user engagement and conversion rates.
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 |
|---|---|---|
| www.xbox.com/en-US/global-shares/templates/CSS/SegoePro-Black-2021.css | 92.7 KiB | 92.7 KiB |
| /xbox-web/static/css/mwf/west-european/green/mwf-main.min... | 84.9 KiB | 82.6 KiB |
| www.xbox.com/en-US/global-shares/templates/CSS/MWFMDL2-Xbox-2021.css | 74.1 KiB | 74.1 KiB |
| assets-xbxweb.xbox.com/xbox-web/static/css/client.a9501186.css | 26.2 KiB | 26.2 KiB |
| assets-xbxweb.xbox.com/xbox-web/static/css/6923.04468c8b.css | 27.1 KiB | 25.6 KiB |
| assets-xbxweb.xbox.com/xbox-web/static/css/3772.a18935f8.css | 22.0 KiB | 22.0 KiB |
| /onerfstatics/marketingsites-eas-prod/west-european/shell... | 22.3 KiB | 19.5 KiB |
| .mectrl_resetStyle,a.mectrl_resetStyle,button.mectrl_resetStyle{height:auto;min-width:auto; … } … | 15.2 KiB | 14.9 KiB |
| www.xbox.com/en-US/global-shares/templates/CSS/xbox-MWF-2021.css | 13.6 KiB | 13.2 KiB |
| .mectrl_resetStyle,a.mectrl_resetStyle,button.mectrl_resetStyle{height:auto;min-width:auto; … } … | 10.3 KiB | 10.2 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| assets-xbxweb.xbox.com/xbox-web/static/js/client.1879560c.js | 280.1 KiB | 195.3 KiB |
| assets-xbxweb.xbox.com/xbox-web/static/js/4278.cec36ae2.js | 195.1 KiB | 122.9 KiB |
| assets-xbxweb.xbox.com/xbox-web/static/js/mwf/mwf-auto-init-main.var.min.js | 81.8 KiB | 59.5 KiB |
| connect.facebook.net/en_US/fbevents.js | 96.3 KiB | 35.8 KiB |
| wcpstatic.microsoft.com/mscc/lib/v2/wcp-consent.js | 51.5 KiB | 28.9 KiB |
| assets-xbxweb.xbox.com/xbox-web/static/js/6305.45044f2a.js | 70.6 KiB | 28.7 KiB |
| assets-xbxweb.xbox.com/xbox-web/static/js/ContentPage.6f8142e6.chunk.js | 29.9 KiB | 28.0 KiB |
| assets-xbxweb.xbox.com/xbox-web/static/js/7828.a5029d2d.chunk.js | 32.0 KiB | 23.7 KiB |
| assets-xbxweb.xbox.com/xbox-web/static/js/4814.2eb587ab.js | 60.6 KiB | 23.6 KiB |
| /onerfstatics/marketingsites-eas-prod/shell/_scrf/js/them... | 36.3 KiB | 20.8 KiB |
| assets-www.xbox.com/legacy/shell/js/legacylayout.min.js | 26.1 KiB | 20.5 KiB |
| assets-xbxweb.xbox.com/xbox-web/static/js/6923.4df879d7.js | 51.5 KiB | 20.5 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.
Performance issues directly impact user engagement and conversion rates.
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
Performance issues directly impact user engagement and conversion rates.
| Category | Time Spent |
|---|---|
| Script Evaluation | 4.3 s |
| Other | 1.7 s |
| Style & Layout | 1.3 s |
| Script Parsing & Compilation | 984 ms |
| Parse HTML & CSS | 398 ms |
| Rendering | 310 ms |
| Garbage Collection | 118 ms |
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 |
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.xbox.com/en-US/global-shares/templates/CSS/xbox-MWF-2021.css | 13.6 KiB | 3.5 KiB |
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.xbox.com/en-US/home/js/contentPop2.js | 20.1 KiB | 8.3 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 | |
|---|---|
A wristwatch with the number 2039 displayed. section.m-image-intro > a.lightboxToutTab > picture.c-image > img | /assets/28/37/28373de2-407d-4e2a-94e2-6a805437e192.jpg?n=... |
The ROG Xbox Ally floating with the dashboard open section.m-image-intro > a.lightboxToutTab > picture.c-image > img | /assets/e7/cb/e7cbf8ee-16e8-45d9-8a69-f1c37c0b2fba.jpg?n=... |
A robot with a gleaming visor holds a rifle as a fleet of spacecraft flies over… section.m-image-intro > a.white-c > picture.c-image > img | /assets/5a/96/5a9622ee-fb6a-4444-9ade-9487bd6bc68a.jpg?n=... |
Imagery from multiple games available or coming soon with Xbox Game Pass Ultima… li#zoomImg1-parent > a.lightboxToutTab > picture.c-image > img | /assets/4d/72/4d728a5f-de3a-4865-8aa8-34dfabf76c36.jpg?n=... |
Brightly coloured anamorphic clay pots run across a cobblestone street with a w… ul > li#zoomImg2-parent > picture.c-image > img | /assets/d0/92/d0923375-699c-4ac5-abe6-335b7aa26cf6.jpg?n=... |
Futuristic city scene with neon lights, abstract blue and orange shapes and a t… ul > li#zoomImg3-parent > picture.c-image > img | /assets/8e/76/8e76da06-7d5b-40ed-b947-076826cc3d89.jpg?n=... |
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 |
a > div > div > img a > div > div > img | /assets/37/ec/37ec5a7a-08b4-466f-93e3-81fb5dd0b471.svg?n=... |
a > div > div > img a > div > div > img | /assets/e2/a8/e2a830ea-71e7-42fa-af94-7a07d66f150e.svg?n=... |
a > div > div > img a > div > div > img | /assets/29/ff/29ffa9b2-2d48-433b-abb7-99229bcbaa8b.svg?n=... |
a > div > div > img a > div > div > img | /assets/50/9a/509a35c3-472d-46ed-b29d-2f47adca7be9.svg?n=... |
a > div > div > img a > div > div > img | /assets/30/ab/30abec76-ab4c-4275-b0ca-725a6eb2f85f.svg?n=... |
a > div > div > img a > div > div > img | /assets/23/fa/23faa3d3-6b06-4f5a-af6b-398871766985.svg?n=... |
Email icon li > a > picture > img | |
Facebook logo li > a > picture > img | |
Instagram logo li > a > picture > img | |
WhatsApp logo li > a > picture > img | |
TikTok logo li > a > picture > img | |
YouTube logo li > a > picture > img | |
X logo li > a > picture > img | |
A human and a golem surrounded by many small animals, ducks, pigs, sheep, turtl… ul > li#zoomImg4-parent > picture.c-image > img | |
Shai Gilgeous-Alexander wearing a Thunder jersey, dribbling a basketball ul > li#zoomImg5-parent > picture.c-image > img | |
A man wearing a fur collared jacket and reflective sunglasses reaches for his h… ul > li#zoomImg6-parent > picture.c-image > img | |
A horned figure stands with his arms raised, to his left a woman sits on a thro… li#zoomImg7-parent > a > picture.c-image > img | |
Lightning strikes behind a monstrous demon with imposing black horns. section.m-image-intro > a.white-c > picture.c-image > img | |
Xbox sphere surrounded by a fog of bright green plasma, with a double-feature s… li#zoomImg8-parent > a > picture.c-image > img |
More information about the performance of your application. These numbers don't directly affect the Performance score.
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Skip to main content div#headerArea > div#headerRegion > div#headerUniversalHeader > a#uhfSkipToMain |
All Microsoft expand to see list of Microsoft products and services header.c-uhfh > div.theme-light > div.c-uhfh-gcontainer-st > button.c-action-trigger |
Microsoft header.c-uhfh > div.theme-light > div.c-uhfh-gcontainer-st > a#uhfLogo |
Xbox div.theme-light > div.c-uhfh-gcontainer-st > div.cat-logo-button-cont > button#uhfCatLogoButton |
Search xbox.com div.c-uhfh-gcontainer-st > div.c-uhfh-actions > form#searchForm > button#search |
0 items in shopping cart div.theme-light > div.c-uhfh-gcontainer-st > div.c-uhfh-actions > a#uhf-shopping-cart |
These are opportunities to improve keyboard navigation in your application.
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. | assets-xbxweb.xbox.com/xbox-web/static/js/6305.45044f2a.js line 1, col 191999 |
| Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/. | cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js line 1, col 79777 |
| CSS appearance value slider-vertical is not standardized and will be removed. | |
| 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. | /onerfstatics/marketingsites-eas-prod/shell/_scrf/js/them... line 4, col 11496 |
| AttributionReporting | connect.facebook.net/en_US/fbevents.js line 279, col 769 |
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
Performance issues directly impact user engagement and conversion rates.
| Source | Description |
|---|---|
Failed to load resource: net::ERR_NAME_NOT_RESOLVED |
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.
Content Best Practices
Descriptive link text helps search engines understand your content. Learn how to make links more accessible.
Performance issues directly impact user engagement and conversion rates.
| Link destination | Link Text |
|---|---|
| www.xbox.com/games/call-of-duty-black-ops-7#whatsnew | LEARN MORE |
| news.xbox.com/2026/04/13/metro-2039-xbox-first-look-how-to-watch/ | LEARN MORE |
| www.xbox.com/handhelds/rog-xbox-ally | LEARN MORE |
| www.xbox.com/games/minecraft#whatsnew | LEARN MORE |
| www.xbox.com/games/xbox-play-anywhere | LEARN MORE |
| /en-us/2026/03/30/xbox-games-showcase-2026-gears-of-war-e... | LEARN MORE |
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
Performance issues directly impact user engagement and conversion rates.
| Uncrawlable Link |
|---|
Skip to main content div#headerArea > div#headerRegion > div#headerUniversalHeader > a#uhfSkipToMain |
To appear in search results, crawlers need access to your app.