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Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

40

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.

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

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.

Why this matters

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
construction workers in safety gear repairing a road with heavy machinery in th… ul.featured > li > a > img.hidden
/medialibrary/media/research/images/april-2026/lse_2026_r...2.7 MiB2.6 MiB
ul.featured > li > a > img.hidden ul.featured > li > a > img.hidden
/medialibrary/media/images/v5/library/markets/reports/omo...970.6 KiB928.3 KiB
tropical rainstorm flooded residential homes and cars in suburban community ul.featured > li > a > img.hidden
/medialibrary/media/research/images/april-2026/lse_2026_e...877.3 KiB835.0 KiB
li#spotlight-slide-7 > div#spotlight-image-7 > a.spotlight-slide-link > img li#spotlight-slide-7 > div#spotlight-image-7 > a.spotlight-slide-link > img
/medialibrary/media/images/v5/library/markets/ttw-how-cha...229.2 KiB218.2 KiB
li#spotlight-slide-1 > div#spotlight-image-1 > a.spotlight-slide-link > img li#spotlight-slide-1 > div#spotlight-image-1 > a.spotlight-slide-link > img
/medialibrary/media/images/v4/markets/landing_page_photo/...166.3 KiB155.4 KiB
four professionals in discussion at a conference room table ul.featured > li > a > img.hidden
/medialibrary/media/research/images/april-2026/lse_2026_a...170.8 KiB128.5 KiB
report cover li#spotlight-slide-5 > div#spotlight-image-5 > a.spotlight-slide-link > img
/medialibrary/media/regional-economy/spotlight/spotlight-...110.1 KiB99.1 KiB
li#spotlight-slide-0 > div#spotlight-image-0 > a.spotlight-slide-link > img li#spotlight-slide-0 > div#spotlight-image-0 > a.spotlight-slide-link > img
/medialibrary/media/images/v5/library/people/nyfed/staff/...91.8 KiB80.8 KiB
ul.featured > li.featured-headline-active > a > img.hidden ul.featured > li.featured-headline-active > a > img.hidden
/medialibrary/media/images/v5/library/people/nyfed/staff/...111.2 KiB75.9 KiB
li#spotlight-slide-4 > div#spotlight-image-4 > a.spotlight-slide-link > img li#spotlight-slide-4 > div#spotlight-image-4 > a.spotlight-slide-link > img
/medialibrary/media/images/v5/library/economic-outlook/tt...73.5 KiB62.6 KiB
three professionals seated at a conference table li#spotlight-slide-2 > div#spotlight-image-2 > a.spotlight-slide-link > img
/medialibrary/media/images/v4/home_page/spotlight_photo/b...33.9 KiB23.7 KiB
li#spotlight-slide-8 > div#spotlight-image-8 > a.spotlight-slide-link > img li#spotlight-slide-8 > div#spotlight-image-8 > a.spotlight-slide-link > img
/medialibrary/media/images/v4/home_page/spotlight_photo/b...31.2 KiB21.8 KiB
li#spotlight-slide-3 > div#spotlight-image-3 > a.spotlight-slide-link > img li#spotlight-slide-3 > div#spotlight-image-3 > a.spotlight-slide-link > img
/medialibrary/media/images/v5/library/markets/tw-omo2025-...22.7 KiB15.8 KiB
packages on a conveyor belt li#spotlight-slide-6 > div#spotlight-image-6 > a.spotlight-slide-link > img
/medialibrary/media/images/v4/home_page/spotlight_photo/r...16.6 KiB7.5 KiB
Federal Reserve Bank Seal div.container_12 > div#footer > div.grid_3 > img#footer_seal
www.newyorkfed.org/medialibrary/media/v4/images/Fed-seal.png8.8 KiB5.6 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:644.9509990234375 label:Time to first byte subpart:timeToFirstByte] map[duration:13.2350009765625 label:Resource load delay subpart:resourceLoadDelay] map[duration:1713.168 label:Resource load duration subpart:resourceLoadDuration] map[duration:368.006 label:Element render delay subpart:elementRenderDelay]]
lhId: page-8-IMG
nodeLabel: ul.featured > li.featured-headline-active > a > img.hidden
path: 1,HTML,1,BODY,2,DIV,6,DIV,1,UL,0,LI,0,A,0,IMG
selector: ul.featured > li.featured-headline-active > a > img.hidden
snippet: <img src="/medialibrary/media/images/v5/library/people/nyfed/staff/williams-john-128…" alt="" class="hidden">

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-8-IMG
nodeLabel: ul.featured > li.featured-headline-active > a > img.hidden
path: 1,HTML,1,BODY,2,DIV,6,DIV,1,UL,0,LI,0,A,0,IMG
selector: ul.featured > li.featured-headline-active > a > img.hidden
snippet: <img src="/medialibrary/media/images/v5/library/people/nyfed/staff/williams-john-128…" alt="" class="hidden">

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
value: no origins were preconnected
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

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

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 850 ms
URLTime Spent
newyorkfed.org/850 ms
www.newyorkfed.org/0.0 ms

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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.

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 44.8 KiB

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 450 ms 48.4 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.

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.

Why this matters

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation1.4 s
Other916 ms
Style & Layout226 ms
Script Parsing & Compilation225 ms
Rendering60 ms
Parse HTML & CSS57 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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure 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

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
Federal Reserve Bank Seal div.container_12 > div#footer > div.grid_3 > img#footer_seal
www.newyorkfed.org/medialibrary/media/v4/images/Fed-seal.png
Close div#myCookieConsent > div > a#cookieButton > img
www.newyorkfed.org/medialibrary/media/footer/close-notice.png

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

●Layout shift culprits
●Optimize DOM size
●Forced reflow
●Modern HTTP
●Optimize viewport for mobile
●User Timing marks and measures 5 user timings
●Avoid long main-thread tasks 11 long tasks found
●Network Requests
●Network Round Trip Times 40 ms
●Server Backend Latencies 380 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 470 ms
○INP breakdown
○Avoid non-composited animations
○Avoid large layout shifts
71

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

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.dxt-logo-wrapper > div > div.dxt-logo-wrapper-a > a.dxt-logo div.dxt-logo-wrapper > div > div.dxt-logo-wrapper-a > a.dxt-logo
div.featured-headlines > ul.featured > li.featured-headline-active > a div.featured-headlines > ul.featured > li.featured-headline-active > a
div.featured-headlines > ul.featured > li > a div.featured-headlines > ul.featured > li > a
ul.spotlight > li#spotlight-slide-0 > div#spotlight-image-0 > a.spotlight-slide-link ul.spotlight > li#spotlight-slide-0 > div#spotlight-image-0 > a.spotlight-slide-link
ul.spotlight > li#spotlight-slide-1 > div#spotlight-image-1 > a.spotlight-slide-link ul.spotlight > li#spotlight-slide-1 > div#spotlight-image-1 > a.spotlight-slide-link
ul.spotlight > li#spotlight-slide-3 > div#spotlight-image-3 > a.spotlight-slide-link ul.spotlight > li#spotlight-slide-3 > div#spotlight-image-3 > a.spotlight-slide-link
ul.spotlight > li#spotlight-slide-4 > div#spotlight-image-4 > a.spotlight-slide-link ul.spotlight > li#spotlight-slide-4 > div#spotlight-image-4 > a.spotlight-slide-link
ul.spotlight > li#spotlight-slide-7 > div#spotlight-image-7 > a.spotlight-slide-link ul.spotlight > li#spotlight-slide-7 > div#spotlight-image-7 > a.spotlight-slide-link
ul.spotlight > li#spotlight-slide-8 > div#spotlight-image-8 > a.spotlight-slide-link ul.spotlight > li#spotlight-slide-8 > div#spotlight-image-8 > a.spotlight-slide-link

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.

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.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
head > meta head > meta

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
PRESS CENTER li#spotlight-slide-0 > a.spotlight-slide-link > span.strap > a.dxt-spotlight-title
REGIONAL ECONOMY li#spotlight-slide-2 > a.spotlight-slide-link > span.strap > a.dxt-spotlight-title
THE TELLER WINDOW li#spotlight-slide-3 > a.spotlight-slide-link > span.strap > a.dxt-spotlight-title
THE TELLER WINDOW li#spotlight-slide-4 > a.spotlight-slide-link > span.strap > a.dxt-spotlight-title
REGIONAL ECONOMY li#spotlight-slide-5 > a.spotlight-slide-link > span.strap > a.dxt-spotlight-title
REGIONAL ECONOMY li#spotlight-slide-6 > a.spotlight-slide-link > span.strap > a.dxt-spotlight-title
THE TELLER WINDOW li#spotlight-slide-7 > a.spotlight-slide-link > span.strap > a.dxt-spotlight-title
ABOUT THE NEW YORK FED li#spotlight-slide-8 > a.spotlight-slide-link > span.strap > a.dxt-spotlight-title

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 html

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-hidden="true"]` is not present on the document `<body>`
●Image elements have `[alt]` attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●Heading elements appear in a sequentially-descending order
○`[accesskey]` values are unique
○`[aria-*]` attributes match their roles
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA attributes are used as specified for the element's role
○Deprecated ARIA roles were not used
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○`[aria-hidden="true"]` elements do not contain focusable descendents
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements use only permitted ARIA attributes
○`[role]`s have all required `[aria-*]` attributes
○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
○`[role]` values are valid
○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
○`[aria-*]` attributes have valid values
○`[aria-*]` attributes are valid and not misspelled
○Buttons have an accessible name
○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
○`<frame>` or `<iframe>` elements have a title
○`<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
○Links are distinguishable without relying on color.
○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
○Image elements do not have `[alt]` attributes that are redundant text.
○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.
77

Best Practices

User Experience

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLDisplayed sizeActual sizeExpected size
Information Requests div.dxt-menu-content > div.dxt-menu-images > a.dxt-menu-content-item > img
/medialibrary/media/images/v4/about_the_fed/mega_menu/atn...140 x 88140 x 88210 x 132
Gold Vault div.dxt-menu-content > div.dxt-menu-images > a.dxt-menu-content-item > img
/medialibrary/media/images/v4/about_the_fed/mega_menu/atn...140 x 88140 x 88210 x 132
Frauds and Scams div.dxt-menu-content > div.dxt-menu-images > a.dxt-menu-content-item > img
/medialibrary/media/images/v4/fisg/mega_menu/fisg_mm_cons...140 x 88140 x 88210 x 132
Need to file a report with the New York Fed? div.dxt-menu-content > div.dxt-menu-images > a.dxt-menu-content-item > img
/medialibrary/media/images/v4/fisg/mega_menu/fisg_mm_repo...140 x 88140 x 88210 x 132
The Governance & Culture Reform div.dxt-menu-content > div.dxt-menu-images > a.dxt-menu-content-item > img
/medialibrary/media/images/v4/fisg/mega_menu/governance-c...140 x 88140 x 88210 x 132
Specialized Courses div.dxt-menu-content > div.dxt-menu-images > a.dxt-menu-content-item > img
/medialibrary/media/images/v4/fs_i/mega_menu/fsi_mm_semin...140 x 88140 x 88210 x 132
Close div#myCookieConsent > div > a#cookieButton > img
www.newyorkfed.org/medialibrary/media/footer/close-notice.png20 x 2020 x 2030 x 30

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Unload event listeners are deprecated and will be removed.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

●Uses HTTPS
●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
●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 clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
100

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.

○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 have descriptive text
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
○Document has a valid `rel=canonical`

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