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.
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.
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.
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.
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 | |
|---|---|---|---|
A white Sonos Ray on a credenza beneath a TV div > div#_0108f2b45991 > figure.relative > img | /images/znqtjj88/production/450055a719c987960f6687fcd8e7f... | 1.4 MiB | 1.4 MiB |
Person riding a bicycle with a black Sonos Play speaker in the front basket div > div#_0108f2b45991 > figure.relative > img | /images/znqtjj88/production/effaa2a79865dd4b84e2a471da38e... | 350.1 KiB | 228.2 KiB |
Person outside listening to music on white Sonos Ace headphones with blue sky a… div > div#_0108f2b45991 > figure.relative > img | /images/znqtjj88/production/fefba3c63bdadf7c6eacb6fbb0c6e... | 84.0 KiB | 54.7 KiB |
Giles Martin section.lg:order-none > div#_29192a56f169 > figure.relative > img | /images/znqtjj88/production/accad8cf4db6cc8cef8454c2ce5c8... | 33.5 KiB | 13.0 KiB |
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
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 |
|---|---|
| sonos.com/ | 243 ms |
| www.sonos.com/en/home | 0.0 ms |
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.
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.
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 |
|---|---|---|
| /_next/static/css/4be42307400234d4.css?dpl=dpl_HR77npGmmW... | 30.9 KiB | 24.9 KiB |
| 21.2 KiB | 20.9 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 | 4.1 s |
| Other | 905 ms |
| Script Parsing & Compilation | 497 ms |
| Style & Layout | 331 ms |
| Garbage Collection | 134 ms |
| Parse HTML & CSS | 116 ms |
| Rendering | 33 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 |
|---|---|
| Pages with cache-control:no-store header cannot enter back/forward cache. | Actionable |
| The page has an unload handler in a sub frame. | 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 |
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 |
|---|---|---|
| analytics.sonos.com/p.js | 120.0 KiB | 47.9 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.
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.
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.
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.basis-full > div#q3fy26-earth-day-refurb > div.w-2 > button.flex div.basis-full > div#q3fy26-earth-day-refurb > div.w-2 > button.flex |
Search nav#right > ul.inline-flex > li.flex > button.flex |
div.relative > div.absolute > div.z-[9] > button.border-none div.relative > div.absolute > div.z-[9] > button.border-none |
div.relative > div.absolute > div.z-[9] > button.border-none div.relative > div.absolute > div.z-[9] > button.border-none |
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
body.has-cookie-banner > img body.has-cookie-banner > 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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.flex > ul.flex > li > a div.flex > ul.flex > li > a |
div.flex > ul.flex > li > a div.flex > ul.flex > li > a |
div.flex > ul.flex > li > a div.flex > ul.flex > li > a |
div.flex > ul.flex > li > a div.flex > ul.flex > 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.
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Astonishingly clear section.lg:order-none > section.w-full > div > h3.tw-typography-h3 |
4000+ div > div.border > div.flex > h5.block |
Mix and match speakers section.lg:order-none > section.w-full > div > h4.block |
Sets nav.flex > div.flex > a.flex > h6.block |
These are opportunities to improve keyboard navigation in your application.
Tables and lists
Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Home body.has-cookie-banner > header.tw-header-nav-spacing > nav#left > ul.inline-flex |
Sale
Shop
New Arrivals
Learn
Support
Professional body.has-cookie-banner > header.tw-header-nav-spacing > nav#center > ul.inline-flex |
My Account body.has-cookie-banner > header.tw-header-nav-spacing > nav#right > ul.inline-flex |
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
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. | |
| AttributionReporting |
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 |
|---|---|
Error: Minified React error #418; visit https://react.dev/errors/418?args[]=HTML&args[]= for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
at rX (https://www.sonos.com/_next/static/chunks/61b5e853-8430af891c2cc329.js?dpl=dpl_HR77npGmmWfDQznR71rQzE97oiSB:1:36657)
at is (https://www.sonos.com/_next/static/chunks/61b5e853-8430af891c2cc329.js?dpl=dpl_HR77npGmmWfDQznR71rQzE97oiSB:1:87558)
at sp (https://www.sonos.com/_next/static/chunks/61b5e853-8430af891c2cc329.js?dpl=dpl_HR77npGmmWfDQznR71rQzE97oiSB:1:128029)
at https://www.sonos.com/_next/static/chunks/61b5e853-8430af891c2cc329.js?dpl=dpl_HR77npGmmWfDQznR71rQzE97oiSB:1:122919
at sn (https://www.sonos.com/_next/static/chunks/61b5e853-8430af891c2cc329.js?dpl=dpl_HR77npGmmWfDQznR71rQzE97oiSB:1:123020)
at sQ (https://www.sonos.com/_next/static/chunks/61b5e853-8430af891c2cc329.js?dpl=dpl_HR77npGmmWfDQznR71rQzE97oiSB:1:149408)
at MessagePort.M (https://www.sonos.com/_next/static/chunks/3528-22399f527ed2dbbd.js?dpl=dpl_HR77npGmmWfDQznR71rQzE97oiSB:2:131186) | |
Failed to load resource: the server responded with a status of 401 () |
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.sonos.com/en/controller-app | Learn more |
| www.sonos.com/en/sonos-radio | Learn more |
| www.sonos.com/en/controller-app | Learn more |
| www.sonos.com/legal/privacy | More information |
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
body.has-cookie-banner > img body.has-cookie-banner > img |
Format your HTML in a way that enables crawlers to better understand your app’s content.