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.
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.
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 | |
|---|---|---|---|
Hallmarks of Liver Cancer figure > a > picture > img | /files/MSHealth/Assets/Global/Newsroom/2026/Release-Resiz... | 504.9 KiB | 498.5 KiB |
AlzheimersProgression figure > a > picture > img | /files/MSHealth/Assets/Global/Newsroom/2026/Release-Resiz... | 451.8 KiB | 445.4 KiB |
Adams Valve Institute figure > a > picture > img | /files/MSHealth/Assets/Global/Newsroom/2026/Release-Resiz... | 391.2 KiB | 384.7 KiB |
Guttman figure > a > picture > img | /files/MSHealth/Assets/Global/Newsroom/2026/Release-Resiz... | 310.5 KiB | 304.1 KiB |
Ianchulev figure > a > picture > img | /files/MSHealth/Assets/Global/Newsroom/2026/Release-Resiz... | 175.8 KiB | 169.3 KiB |
New York skyscrapers figure > a > picture > img | /files/MSHealth/Assets/Global/Newsroom/2021/ISMMS-Spotlig... | 138.8 KiB | 132.3 KiB |
Instagram Icon
Instagram
Did you know our labs process around 40,000 specimens… div.owl-stage-outer > div.owl-stage > div.owl-item > aside | www.juicer.io/api/media/28295660?s=1c1321758d72a87df1dae04e39c4c435371351cf | 541.0 KiB | 91.2 KiB |
Doctor using a computer figure > a > picture > img | /files/MSHealth/Assets/Global/Newsroom/2021/ISMMS-Spotlig... | 62.4 KiB | 55.9 KiB |
Find a Location div.full-width > aside.full > picture > img | /files/MSHealth/Assets/Media/final/new-york-city-brooklyn... | 133.9 KiB | 36.2 KiB |
YouTube Icon
YouTube
In this episode of The Vitals, we explore a question that… div.owl-stage-outer > div.owl-stage > div.owl-item > aside | i.ytimg.com/vi/_PyhoRA7Vas/maxresdefault.jpg | 167.5 KiB | 17.5 KiB |
Facebook Icon
Facebook
Did you know our labs process around 40,000 specimens p… div.owl-stage-outer > div.owl-stage > div.owl-item > aside | /api/posts/507360690/images.jpg?external_id=1436163448555... | 123.6 KiB | 11.1 KiB |
Facebook Icon
Facebook
In recognition of Medical Laboratory Professionals Week… div.owl-stage-outer > div.owl-stage > div.owl-item > aside | /api/posts/507405530/images.jpg?external_id=1437630158408... | 112.3 KiB | 6.8 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.
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 |
|---|---|
| mountsinai.org/ | 454 ms |
| www.mountsinai.org/ | 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 |
|---|---|---|
| /mshealth/themes/default/styles/style.css?v=1768312164000... | 29.0 KiB | 25.7 KiB |
| /mshealth/themes/default/styles/override.css?v=1768312164... | 21.9 KiB | 20.4 KiB |
| www.mountsinai.org/mshealth/themes/default/styles/vendor.css | 21.8 KiB | 19.0 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 |
|---|---|---|
| /answers/dev/dev-iife/answers.js?v=1768312164000build_msh... | 1.0 MiB | 162.5 KiB |
| /_/translate_http/_/js/k=translate_http.tr.nl.2-2JqXXxIUQ... | 78.1 KiB | 60.9 KiB |
| www.googletagmanager.com/gtm.js?id=GTM-5Z94L8 | 140.1 KiB | 60.0 KiB |
| ide.user1st.info/content/ufeInit.prod.js | 95.0 KiB | 55.0 KiB |
| /answers/v1.4.2/answerstemplates-iife.compiled.min.js?v=1... | 51.2 KiB | 42.0 KiB |
| doctor.mountsinai.org/v3/_next/static/chunks/15-180dc80c167df091.js | 62.8 KiB | 41.0 KiB |
| mountsinai.containers.piwik.pro/a27d2fb5-8255-4f15-94c7-cd1f4ffb0436.js | 146.3 KiB | 22.4 KiB |
| mountsinai.containers.piwik.pro/a27d2fb5-8255-4f15-94c7-cd1f4ffb0436.js | 146.3 KiB | 21.2 KiB |
| h1.avaamo.com/web_channels/dafef244-f2b4-44f7-92d6-343dcf6ed55d | 96.4 KiB | 21.1 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 | 2.3 s |
| Other | 902 ms |
| Style & Layout | 720 ms |
| Script Parsing & Compilation | 549 ms |
| Rendering | 243 ms |
| Parse HTML & CSS | 115 ms |
| Garbage Collection | 49 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 a sub frame. | 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 |
|---|---|---|
| /answers/dev/dev-iife/answers.js?v=1768312164000build_msh... | 1.0 MiB | 859.2 KiB |
| cdn.plu.mx/extjs/xss.js | 49.3 KiB | 20.7 KiB |
| cdn.plu.mx/extjs/xss.js | 49.3 KiB | 20.7 KiB |
| www.mountsinai.org/gsights/vendor/requirejs/require.js | 17.3 KiB | 11.9 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.
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.
ARIA
Focusable descendents within an `[aria-hidden="true"]` element prevent those interactive elements from being available to users of assistive technologies like screen readers. Learn how `aria-hidden` affects focusable elements.
Informational: a Permissions-Policy directive showing feature -> allowed origins.
Source: MDN Permissions-Policy
| Failing Elements |
|---|
x
Mount Sinai has reached an agreement with Anthem Blue Cross Blue Shield to r… body.mshs-home > div.mshs-alert |
Get Care Now
Get Care Now
Getting care is easy and convenient. Access virtual… body.mshs-home > div.container-fluid |
We use cookies and similar technologies to improve your experience, analyze usa… body.mshs-home > div#ppms_cm_consent_popup_a27d2fb5-8255-4f15-94c7-cd1f4ffb0436 |
These are opportunities to improve the usage of ARIA in your application which 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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Find a Doctor nav.main-nav > ul.navbar > li.no-expand-mobile > a.hidden-xs |
Our Locations nav.main-nav > ul.navbar > li > a.hidden-xs |
Patient Care nav.main-nav > ul.navbar > li > a.hidden-xs |
About Us nav.main-nav > ul.navbar > li > a.hidden-xs |
Search a.hidden-xs > section.global-search__container--parent > div.global-search__container--icon > span |
MyMountSinai (MyChart) div.pull-right > ul.contact-list > li > a |
Check Symptoms & Get Care div.pull-right > ul.contact-list > li > a |
Pay My Bill div.pull-right > ul.contact-list > li > a |
For Physicians div.pull-right > ul.contact-list > li > a |
Icahn School of Medicine div.pull-right > ul.contact-list > li > a |
Make a Gift div.pull-right > ul.contact-list > li > a |
Get Care Now div.hpcards__container--inner > div.hpcards__container--content > a.hpcards__container--a > span.hpcards__container--content--title |
Getting care is easy and convenient. Access virtual visits or in-person care. div.hpcards__container--inner > div.hpcards__container--content > span.hpcards__container--content--desc > p |
See Care Options div.hpcards__container--inner > div.text-center > a.btn > span |
Book Online div.hpcards__container--inner > div.hpcards__container--content > a.hpcards__container--a > span.hpcards__container--content--title |
Book an Appointment now with a Mount Sinai doctor. div.hpcards__container--inner > div.hpcards__container--content > span.hpcards__container--content--desc > p |
Book an Appointment div.hpcards__container--inner > div.text-center > a.btn > span |
MyMountSinai® App div.hpcards__container--inner > div.hpcards__container--content > a.hpcards__container--a > span.hpcards__container--content--title |
Sign in with your MyChart account and take care of your healthcare needs. div.hpcards__container--inner > div.hpcards__container--content > span.hpcards__container--content--desc > p |
Download Our App div.hpcards__container--inner > div.text-center > a.btn > span |
Our Services div.listing > h2 > a > span |
Cancer div > ul > li > a |
Ear, Nose, and Throat div > ul > li > a |
Geriatrics div > ul > li > a |
Heart - Cardiology and Cardiovascular Surgery div > ul > li > a |
Neurology div > ul > li > a |
Neurosurgery div > ul.ul-columns > li > a |
Orthopedics div > ul.ul-columns > li > a |
Spine div > ul.ul-columns > li > a |
Surgery div > ul.ul-columns > li > a |
Urology div > ul.ul-columns > li > a |
View All of Our Services div.listing-img > div.listing-block > div.listing > a.view-more |
View All Press Releases div.infobox-panel > div.detail > div > a |
View All Press Releases div.infobox-panel > div.detail > div > a |
View All Press Releases div.infobox-panel > div.detail > div > a |
Agree to all div#ppms_cm_popup_responsive_wrapper_id > div#ppms-59442d7f-1516-40e2-bbd7-12ad4b9a353e > div#ppms-3cde0edc-dff1-4c19-939f-15c95f4382d6 > button#ppms_cm_agree-to-all |
Decline all div#ppms_cm_popup_responsive_wrapper_id > div#ppms-59442d7f-1516-40e2-bbd7-12ad4b9a353e > div#ppms-3cde0edc-dff1-4c19-939f-15c95f4382d6 > button#ppms_cm_reject-all |
Adjust cookie settings div#ppms_cm_popup_main_id > div#ppms_cm_popup_responsive_wrapper_id > div#ppms-b7755843-4632-4d35-aa07-c3748012a683 > button#ppms_cm_content_expander_show_btn |
Privacy policy div#ppms_cm_popup_main_id > div#ppms_cm_popup_responsive_wrapper_id > div#ppms-b7755843-4632-4d35-aa07-c3748012a683 > a#popup-link |
These are opportunities to improve the legibility of your content.
Best practices
Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.
Informational: a Permissions-Policy directive showing feature -> allowed origins.
Source: MDN Permissions-Policy
| Failing Elements |
|---|
head > meta head > meta |
One main landmark helps screen reader users navigate a web page. Learn more about landmarks.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
html.flexboxlegacy html.flexboxlegacy |
These items highlight common accessibility best practices.
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 body.mshs-home > header.c01-crown > div.skiptomain__ribbon > a#skiptomain__btn |
These are opportunities to improve keyboard navigation in your application.
Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Find a Doctor nav.main-nav > ul.navbar > li.no-expand-mobile > a.hidden-xs |
Our Locations nav.main-nav > ul.navbar > li > a.hidden-xs |
Patient Care nav.main-nav > ul.navbar > li > a.hidden-xs |
About Us nav.main-nav > ul.navbar > li > a.hidden-xs |
Search nav.main-nav > ul.navbar > li.no-expand-mobile > a.hidden-xs |
Translate div#google_translate_element > div.skiptranslate > span > a.VIpgJd-ZVi9od-l4eHX-hSRGPd |
MyMountSinai (MyChart) div.pull-right > ul.contact-list > li > a |
Check Symptoms & Get Care div.pull-right > ul.contact-list > li > a |
Pay My Bill div.pull-right > ul.contact-list > li > a |
For Physicians div.pull-right > ul.contact-list > li > a |
Icahn School of Medicine div.pull-right > ul.contact-list > li > a |
Make a Gift div.pull-right > ul.contact-list > li > a |
Mount Sinai Today Blog div.nav > ul > li > a |
MyMountSinai® App div.nav > ul > li > a |
Pay My Bill div.nav > ul > li > a |
No Surprises Act div.nav > ul > li > a |
International Services div.nav > ul > li > a |
Mount Sinai Access div.nav > ul > li > a |
Find a Doctor div.nav > ul > li > a |
Check Symptoms & Get Care div.nav > ul > li > a |
Patient Representatives Offices div.nav > ul > li > a |
Language and Accessibility div.nav > ul > li > a |
Clinical Trials div.nav > ul > li > a |
Newsroom div.nav > ul > li > a |
Patient Events div.nav > ul > li > a |
Icahn School of Medicine at Mount Sinai div.nav > ul > li > a |
Medical Education div.nav > ul > li > a |
Graduate Education div.nav > ul > li > a |
Research div.nav > ul > li > a |
Find Faculty div.nav > ul > li > a |
Phillips School of Nursing div.nav > ul > li > a |
Insurance div.nav > ul > li > a |
Faculty Events div.nav > ul > li > a |
Transfer a Patient div.nav > ul > li > a |
Mount Sinai Connect div.nav > ul > li > a |
Refer a Patient div.nav > ul > li > a |
Nursing div.nav > ul > li > a |
Hospital Sponsored Programs div.nav > ul > li > a |
Medical Staff Services div.nav > ul > li > a |
Staff Events div.nav > ul > li > a |
Contact Us div.nav > ul > li > a |
Careers div.nav > ul > li > a |
Terms & Conditions div.nav > ul > li > a |
Privacy Policy div.nav > ul > li > a |
HIPAA Privacy Practices div.nav > ul > li > a |
Compliance div.nav > ul > li > a |
Non-Discrimination Notice div.nav > ul > li > a |
Patient Responsibilities div.nav > ul > li > a |
Price Transparency div.nav > ul > li > a |
Vendors div.nav > ul > li > a |
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. | s.go-mpulse.net/boomerang/BFBHG-C2X3N-GCWAN-UMPXK-HSX6S line 9, col 11356 |
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: the server responded with a status of 403 () | |
Failed to load resource: the server responded with a status of 404 () | |
TypeError: g.owlCarousel is not a function |
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 |
|---|---|
| keepmountsinai.org/ | 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 |
|---|
x body.mshs-home > div.mshs-alert > div.mshs-text > a.mshs-close |
Accessibility div.nav > ul > li#u1st-accessibility-footer-link > a |
body.mshs-home > div#avm_chat_widget_dafef244-f2b4-44f7-92d6-343dcf6ed55d > div.avm-bot-welcome-notification > a.avm-icon-cross body.mshs-home > div#avm_chat_widget_dafef244-f2b4-44f7-92d6-343dcf6ed55d > div.avm-bot-welcome-notification > a.avm-icon-cross |
To appear in search results, crawlers need access to your app.