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Lighthouse Desktop

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

Audit breakdown by category with detailed findings.

51

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.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
contentinfo.discover.com/cdn/ca/jquery-3.6.1.min.js?0.0 ms635.3 KiB
cdnssl.clicktale.net/www15/ptc/fd145cf2-4109-439c-97f8-e0bc3c3e290d.js900.0 s145.2 KiB
www.discover.com/s6YAhsHw9/lG/-KY1u8g/V9uaQXY39fzYJmiX9S/dj0xMno/GnF/9EF5LIFcB21600.0 s179.0 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
assets.adobedtm.com/1e5ef0994701/d37390dc6a0a/launch-c54b9d72c46c.min.js3600.0 s78.1 KiB
www.datadoghq-browser-agent.com/us1/v5/datadog-rum.js14400.0 s52.0 KiB
/signals/config/1206772346807435?v=2.9.303&r=stable&domai...1200.0 s39.4 KiB
/etc.clientlibs/dfs-core/clientlibs/clientlib-core/resour...86400.0 s85.0 KiB
/js/current/dpm_pixel_min.js?aid=discover-dc1bf83e-5f06-4...0.0 ms31.6 KiB
cdn.branch.io/branch-latest.min.js300.0 s23.5 KiB
portal.discover.com/web/enterprise/login/index-EXzV9Qvm.js1296000.0 s191.8 KiB
/etc.clientlibs/dfs-core/clientlibs/clientlib-core/resour...86400.0 s42.6 KiB
/etc.clientlibs/dfs-core/clientlibs/clientlib-core/resour...86400.0 s42.0 KiB
/etc.clientlibs/dfs-core/clientlibs/clientlib-core/resour...86400.0 s41.3 KiB
/pcc/fd145cf2-4109-439c-97f8-e0bc3c3e290d.js?DeploymentCo...900.0 s18.4 KiB
/etc.clientlibs/dfs-core/clientlibs/clientlib-core/resour...86400.0 s30.3 KiB
cdnssl.clicktale.net/ptc/fd145cf2-4109-439c-97f8-e0bc3c3e290d.js900.0 s8.1 KiB
s.go-mpulse.net/boomerang/RL6FP-7VUY8-NDC3K-X55B8-GT8C6604800.0 s56.6 KiB
/cdn/ca/1.7.2/mutha-discover-wrapper.js?a=9f89c84a559f573...0.0 ms1.8 KiB
/1e5ef0994701/d37390dc6a0a/304a5647508f/RCa7ff936fdac846f...3600.0 s1.3 KiB
cdnssl.clicktale.net/www/bridge-WR110.js86400.0 s2.6 KiB
/_r?sdk=web2.87.1&branch_key=key_live_gevPwVGxd97F95YmLl3...0.0 ms664 B
cdnssl.clicktale.net/www15/ptc/fd145cf2-4109-439c-97f8-e0bc3c3e290d.js900.0 s441 B
/tr/?id=1206772346807435&ev=PageView&dl=https%3A%2F%2Fwww...0.0 ms16 B

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.

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:140.941 label:Time to first byte subpart:timeToFirstByte] map[duration:2459.973 label:Resource load delay subpart:resourceLoadDelay] map[duration:16.41 label:Resource load duration subpart:resourceLoadDuration] map[duration:54.61 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-DIV
nodeLabel: Whatever you’re looking for— we’ve got a card for that Unlimited rewards, sec…
path: 1,HTML,1,BODY,36,DIV,0,DIV,0,DIV,0,DIV,1,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,SECTION,0,DIV
selector: div.dynamic-banner > div.dmp-area > section.banner > div#item-size1
snippet: <div class="item-image default-content background-image--variation" id="item-size1" style="background-image: url(&quot;/content/dam/discover/en_us/gateway/tiles/JC_Image_…&quot;);">

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-0-DIV
nodeLabel: Whatever you’re looking for— we’ve got a card for that Unlimited rewards, sec…
path: 1,HTML,1,BODY,36,DIV,0,DIV,0,DIV,0,DIV,1,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,SECTION,0,DIV
selector: div.dynamic-banner > div.dmp-area > section.banner > div#item-size1
snippet: <div class="item-image default-content background-image--variation" id="item-size1" style="background-image: url(&quot;/content/dam/discover/en_us/gateway/tiles/JC_Image_…&quot;);">

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

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.

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
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

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.

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
/content/dam/discover/en_us/gateway/tiles/Q2_2026_BoxC_Kn...24.4 KiB9.8 KiB
div.aem-Grid > div.dmptilesfragment > div.dmp-tile-container > div.dmp-tile-wrapper div.aem-Grid > div.dmptilesfragment > div.dmp-tile-container > div.dmp-tile-wrapper
/content/dam/discover/en_us/gateway/tiles/D.com_Placement...14.3 KiB5.7 KiB
div.dmptilesfragment > div.dmp-tile-container > div.right-top-yellow-curve > div.dmp-tile-wrapper div.dmptilesfragment > div.dmp-tile-container > div.right-top-yellow-curve > div.dmp-tile-wrapper
/content/dam/discover/en_us/gateway/tiles/danceB_C_460x19...18.8 KiB4.1 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 268 ms
URLTime Spent
discover.com/268 ms
www.discover.com/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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

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

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: 130 ms 140.3 KiB
URLTransfer SizeEst Savings
/etc.clientlibs/dfs-cards-portfolio/clientlibs/clientlib-...145.3 KiB140.3 KiB

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 Evaluation2.3 s
Other570 ms
Script Parsing & Compilation264 ms
Style & Layout111 ms
Garbage Collection64 ms
Rendering52 ms
Parse HTML & CSS35 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
The page has an unload handler in a sub frame.Actionable

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

Layout shift culprits
Optimize DOM size
Font display
Forced reflow
Optimize viewport for mobile
Minify CSS
Minify JavaScript
User Timing marks and measures 5 user timings
Avoid long main-thread tasks 10 long tasks found
Image elements have explicit `width` and `height`
Network Requests
Network Round Trip Times 100 ms
Server Backend Latencies 210 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 20 ms
Avoid large layout shifts 3 layout shifts found
INP breakdown
Avoid non-composited animations
97

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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Explore Cards div.sitex-btnLeftSection > div.sitex-btn-div > a.cmp-button > span.cmp-button__text

These are opportunities to improve the legibility of your content.

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-*]` attributes match their roles
`[aria-hidden="true"]` is not present on the document `<body>`
`[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
`[aria-*]` attributes have valid values
`[aria-*]` attributes are valid and not misspelled
Buttons have an accessible name
Image elements have `[alt]` attributes
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
ARIA attributes are used as specified for the element's role
`[aria-hidden="true"]` elements do not contain focusable descendents
Elements use only permitted ARIA attributes
Document has a `<title>` element
`<html>` element has a `[lang]` attribute
`<html>` element has a valid value for its `[lang]` attribute
Links are distinguishable without relying on color.
Links have a discernible name
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
Touch targets have sufficient size and spacing.
Heading elements appear in a sequentially-descending order
Skip links are focusable.
Document has a main landmark.
Deprecated ARIA roles were not used
ARIA IDs are unique
Identical links have the same purpose.
Elements with visible text labels have matching accessible names.
`[accesskey]` values are unique
`button`, `link`, and `menuitem` elements have accessible names
Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
ARIA input fields have accessible names
ARIA `meter` elements have accessible names
ARIA `progressbar` elements have accessible names
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
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
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
The document does not use `<meta http-equiv="refresh">`
`<object>` elements have alternate text
Select elements have associated label elements.
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.
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.
65

Best Practices

User Experience

Preventing input pasting is a bad practice for the UX, and weakens security by blocking password managers.Learn more about user-friendly input fields.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#search_overlay > div.search-container > form#suggestion_form > input#predict-input div#search_overlay > div.search-container > form#suggestion_form > input#predict-input

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.
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

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
Failed to load resource: the server responded with a status of 451 ()

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
Avoids requesting the geolocation permission on page load
Avoids requesting the notification permission on page load
Displays images with correct aspect ratio
Serves images with appropriate resolution
Page has the HTML doctype
Properly defines charset
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 DOM-based XSS with Trusted Types
Detected JavaScript libraries
Redirects HTTP traffic to HTTPS
Mitigate clickjacking with XFO or CSP
77

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

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
ContinueLeave pulsenetwork.com and continue to external website div.modal-dialog > div.modal-content > div.modal-footer > a.btn-continue

To appear in search results, crawlers need access to your app.

Structured data is valid
Page isn’t blocked from indexing
Document has a `<title>` element
Page has successful HTTP status code
robots.txt is valid
Image elements have `[alt]` attributes
Document has a valid `hreflang`
Document has a valid `rel=canonical`

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