Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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.

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.

Request	Cache TTL	Transfer Size
cdn.universityrelations.cornell.edu/images/research-2025.jpg	0.0 ms	121.7 KiB
/photos/400x225/97ED1A7B-A4EA-2A1D-0682FB1FC93E4312.jpg	36000.0 s	213.3 KiB
/photos/360x360/AA85866B-C44E-42F6-24C93F3A6A54E260.jpg	0.0 ms	114.0 KiB
/photos/360x360/AA35CCCB-A98C-F255-3FB3D87C97A41615.jpg	36000.0 s	188.6 KiB
/photos/360x360/AA427B20-D637-6D0E-190A5C495943239C.jpg	36000.0 s	179.9 KiB
/photos/360x360/AA505462-AF6E-14EB-391E7B23F0B05978.jpg	36000.0 s	171.0 KiB
/photos/360x360/1A07FF21-BAD7-6A1C-BB7C63EB8210FBE7.jpg	36000.0 s	120.5 KiB
/photos/400x225/850FCA14-9FD4-867A-6CD5A1621A680F3E.jpg	0.0 ms	65.8 KiB
/photos/360x360/AA714B42-BFFF-B6A8-02E0E198925385AC.jpg	36000.0 s	110.7 KiB
/photos/360x360/959BCAAF-FC30-8716-A3B213D64FE3D41A.jpg	36000.0 s	108.4 KiB
/photos/360x360/F4FD8094-E12B-0957-5E262F301DDD8B91.jpg	36000.0 s	97.2 KiB
/photos/360x360/A746AA91-F77D-AB4C-9F141556580C6E4C.jpg	36000.0 s	87.0 KiB
/photos/360x360/AB69298D-A62D-B445-9A92E772C3BAD9DD.jpg	36000.0 s	82.6 KiB
/photos/400x225/AA664986-C9E4-E7DB-D5AC14ED3C2BCD8D.jpg	36000.0 s	79.5 KiB
/photos/400x225/4F45AC93-09A5-5E26-B59B80F5D7E369F3.jpg	36000.0 s	77.8 KiB
/photos/360x360/76583D5F-E4A2-0A6C-F49C1FC9E7067410.jpg	36000.0 s	74.0 KiB
/photos/360x360/CBEDE10A-9C64-465F-AC30FBF6802F84F3.jpg	36000.0 s	68.5 KiB
/photos/360x360/A1D836A8-CC07-608E-7D68529F791B6AA9.jpg	36000.0 s	62.1 KiB
/photos/400x225/1A0BB4DE-BAC0-5DE3-C487894F3B5F68CE.jpg	36000.0 s	58.0 KiB
/photos/360x360/302DED93-F593-9467-3E522A81AC61C14B.jpg	36000.0 s	54.0 KiB
/photos/360x360/60EBEEC5-CE92-845C-74B7376D643E24EB.jpg	36000.0 s	47.4 KiB
/photos/360x360/8BB745DD-F57F-EC7B-13CA4386B1D18703.jpg	36000.0 s	39.4 KiB
ssl.google-analytics.com/ga.js	7200.0 s	17.4 KiB
media.univcomm.cornell.edu/photos/campaign/TDTGG.png	7200.0 s	12.2 KiB
use.typekit.net/gog6dck.js	600.0 s	7.0 KiB
siteimproveanalytics.com/js/siteanalyze_6120104.js	86400.0 s	13.3 KiB
/p.gif?s=1&k=gog6dck&ht=tk&h=www.cornell.edu&f=10954.1345...	604800.0 s	205 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.

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.

URL	Est Savings
www.cornell.edu/assets/core/fonts/fontcustom.woff	665 ms
use.typekit.net/af/5464d5/00000000000000000001205a/27/l?subset_id=2&fvd=i4&v=3	20 ms
use.typekit.net/af/8cf83d/00000000000000000001205c/27/l?subset_id=2&fvd=i7&v=3	15 ms
use.typekit.net/af/cef9f3/000000000000000000010b5e/27/l?subset_id=2&fvd=n6&v=3	10 ms
use.typekit.net/af/04ec74/00000000000000000001205b/27/l?subset_id=2&fvd=n7&v=3	10 ms
use.typekit.net/af/ac6334/000000000000000000012059/27/l?subset_id=2&fvd=n4&v=3	5.0 ms
use.typekit.net/af/1709eb/000000000000000000010b60/27/l?subset_id=2&fvd=n7&v=3	5.0 ms
use.typekit.net/af/1aea0d/000000000000000000012106/27/l?subset_id=2&fvd=n3&v=3	5.0 ms

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.

	URL	Resource Size	Est Savings
Ezra Cornell statue imposed over a red background in front of a large floating … `body.home > div#campaign > img#campaignCoverImg`	www.cornell.edu/assets/images/campaign/ezra.jpg	219.6 KiB	173.7 KiB
Three Cornellians sit on the Cornell Libe Slope on a warm March day. `a.socialmedia-grid-link > div.socialmedia-grid > div.socialmedia-item > img`	/photos/360x360/AA35CCCB-A98C-F255-3FB3D87C97A41615.jpg	188.2 KiB	171.5 KiB
The reflection of cherry blossoms seen in a window of Cornell's Sage Hall. `a.socialmedia-grid-link > div.socialmedia-grid > div.socialmedia-item > img`	/photos/360x360/AA714B42-BFFF-B6A8-02E0E198925385AC.jpg	110.4 KiB	106.4 KiB
A video of collage of various Cornell reasearhers and their work. `div > div#cover-area > div#cover-video > video#cover-vid`	cdn.universityrelations.cornell.edu/images/research-2025.jpg	121.1 KiB	101.4 KiB
div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace `div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace`	/photos/360x360/1A07FF21-BAD7-6A1C-BB7C63EB8210FBE7.jpg	120.1 KiB	99.0 KiB
Cornellian operating a dril press. `a.socialmedia-grid-link > div.socialmedia-grid > div.socialmedia-item > img`	/photos/360x360/F4FD8094-E12B-0957-5E262F301DDD8B91.jpg	96.9 KiB	92.9 KiB
Cornell's McGraw Tower, framed by cherry leaves, against a brilliant blue sky. `a.socialmedia-grid-link > div.socialmedia-grid > div.socialmedia-item > img`	/photos/400x225/AA664986-C9E4-E7DB-D5AC14ED3C2BCD8D.jpg	79.2 KiB	69.8 KiB
div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace `div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace`	/photos/360x360/A746AA91-F77D-AB4C-9F141556580C6E4C.jpg	86.7 KiB	65.6 KiB
Students perform a wet aggregate stability experiment. `div.slide-mask > div.slideshow > a.grid-box > img.image-replace`	/photos/400x225/4F45AC93-09A5-5E26-B59B80F5D7E369F3.jpg	77.5 KiB	62.9 KiB
div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace `div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace`	/photos/360x360/AB69298D-A62D-B445-9A92E772C3BAD9DD.jpg	82.3 KiB	61.2 KiB
div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace `div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace`	/photos/360x360/76583D5F-E4A2-0A6C-F49C1FC9E7067410.jpg	73.7 KiB	52.6 KiB
Gavin Sacks. `div.slide-mask > div.slideshow > a.grid-box > img.image-replace`	/photos/400x225/850FCA14-9FD4-867A-6CD5A1621A680F3E.jpg	65.6 KiB	50.9 KiB
To do he greatest good: The Campaign for Cornell University `li.ftr-item > div.ftr-item-campaign > a > img`	media.univcomm.cornell.edu/photos/campaign/TDTGG.png	12.8 KiB	7.2 KiB

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-13-SPAN

nodeLabel: A revived device reveals scents that attract and deter crop pests

path: 5,HTML,2,BODY,9,DIV,1,DIV,2,DIV,0,SPAN

selector: div#main > div.marquee-mask > div.marquee > span#panobg-1A023AAE-0694-71F8-FF05A7CAD582F72F

snippet: <span id="panobg-1A023AAE-0694-71F8-FF05A7CAD582F72F" class="marquee-item gradientAdjustTop0p gradientAdjustBottom0p marquee-position-1…" style="position: absolute; left: 0px; top: 0px; display: block;" data-counter="1" data-click-label="1|1A023AAE-0694-71F8-FF05A7CAD582F72F|A62E1CFA-A4A5-EAAC-BBFFF9FFFFEACDC6|…" data-click-action="pano | content">

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

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.

URL	Transfer Size	Duration
www.cornell.edu/assets/css/style.css?ver=20250512	12.4 KiB	311 ms
www.cornell.edu/assets/css/print.css?ver=20250512	700 B
www.cornell.edu/assets/core/css/cornell.css?ver=20250512	45.4 KiB	621 ms
www.cornell.edu/assets/core/js/lib/modernizr.js?ver=20250512	6.4 KiB
use.typekit.net/gog6dck.js	7.0 KiB
www.cornell.edu/assets/css/social-grid.css	1.2 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: 1.1 s

URL	Time Spent
cornell.edu/	1.1 s
www.cornell.edu/	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

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: 420 ms 50.9 KiB

URL	Transfer Size	Est Savings
www.cornell.edu/assets/core/css/cornell.css?ver=20250512	45.1 KiB	40.3 KiB
www.cornell.edu/assets/css/style.css?ver=20250512	12.1 KiB	10.6 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.

Estimated savings: 1.2 s 241.8 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-PMZ19X3F8W&cx=c&gtm=4e64f0	156.4 KiB	110.4 KiB
www.googletagmanager.com/gtag/js?id=G-PMZ19X3F8W	156.4 KiB	67.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-WW83RG9	127.1 KiB	64.2 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.

Category	Time Spent
Other	917 ms
Script Evaluation	752 ms
Style & Layout	478 ms
Rendering	196 ms
Script Parsing & Compilation	157 ms
Parse HTML & CSS	61 ms

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.

Estimated savings: 0.0 ms 12.8 KiB

URL	Transfer Size	Est Savings
www.cornell.edu/assets/core/css/cornell.css?ver=20250512	45.4 KiB	9.0 KiB
www.cornell.edu/assets/css/style.css?ver=20250512	12.4 KiB	3.8 KiB

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: 0.0 ms 10.9 KiB

URL	Transfer Size	Est Savings
www.cornell.edu/assets/core/js/lib/plugins.js	9.9 KiB	4.9 KiB
www.cornell.edu/assets/core/js/cornell.js?ver=20191023a	9.5 KiB	3.3 KiB
www.cornell.edu/assets/js/cornelledu.js?ver=20230613a	7.1 KiB	2.6 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
/p/537811/sp/53781100/download/entry_id/1_6qqtj7t8/flavor...	8.6 MiB
/photos/400x225/97ED1A7B-A4EA-2A1D-0682FB1FC93E4312.jpg	213.3 KiB
www.cornell.edu/assets/images/campaign/ezra.jpg	202.3 KiB
/photos/360x360/AA35CCCB-A98C-F255-3FB3D87C97A41615.jpg	188.6 KiB
/photos/360x360/AA427B20-D637-6D0E-190A5C495943239C.jpg	179.9 KiB
/photos/360x360/AA505462-AF6E-14EB-391E7B23F0B05978.jpg	171.0 KiB
www.googletagmanager.com/gtag/js?id=G-PMZ19X3F8W&cx=c&gtm=4e64f0	156.5 KiB
www.googletagmanager.com/gtag/js?id=G-PMZ19X3F8W	156.5 KiB
www.googletagmanager.com/gtm.js?id=GTM-WW83RG9	127.4 KiB
cdn.universityrelations.cornell.edu/images/research-2025.jpg	121.7 KiB

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
Ezra Cornell statue imposed over a red background in front of a large floating … `body.home > div#campaign > img#campaignCoverImg`	www.cornell.edu/assets/images/campaign/ezra.jpg
div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace `div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace`	/photos/360x360/AB69298D-A62D-B445-9A92E772C3BAD9DD.jpg
div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace `div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace`	/photos/360x360/A746AA91-F77D-AB4C-9F141556580C6E4C.jpg
div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace `div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace`	/photos/360x360/76583D5F-E4A2-0A6C-F49C1FC9E7067410.jpg
div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace `div.home-honeycomb > div#honeycomb > a.hc-item > img.image-replace`	/photos/360x360/1A07FF21-BAD7-6A1C-BB7C63EB8210FBE7.jpg
Tweezers holding a tiny device. `div.marquee-mask > div.marquee > span#panobg-1A023AAE-0694-71F8-FF05A7CAD582F72F > img.marquee-img`	/photos/400x225/1A0BB4DE-BAC0-5DE3-C487894F3B5F68CE.jpg
Gavin Sacks. `div.slide-mask > div.slideshow > a.grid-box > img.image-replace`	/photos/400x225/850FCA14-9FD4-867A-6CD5A1621A680F3E.jpg
Students perform a wet aggregate stability experiment. `div.slide-mask > div.slideshow > a.grid-box > img.image-replace`	/photos/400x225/4F45AC93-09A5-5E26-B59B80F5D7E369F3.jpg
To do he greatest good: The Campaign for Cornell University `li.ftr-item > div.ftr-item-campaign > a > img`	media.univcomm.cornell.edu/photos/campaign/TDTGG.png
body.home > div#main > div.marquee-mask > img.image-replace `body.home > div#main > div.marquee-mask > img.image-replace`

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

●Max Potential First Input Delay 130 ms

●Layout shift culprits

●Optimize DOM size

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●User Timing marks and measures 5 user timings

●JavaScript execution time 0.8 s

●Avoid long main-thread tasks 6 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 160 ms

●Server Backend Latencies 120 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 220 ms

●Avoid large layout shifts 11 layout shifts found

○INP breakdown

○Avoid non-composited animations

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

Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Research saves lives. Research feeds the world. Research helps animals. Researc… `div.vcenter2 > div.container > div.typing-container > span#typedText`

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.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Skip to content `body.home > nav#skip-link > a`

These are opportunities to improve keyboard navigation in your application.

○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

●`[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

●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

●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

●`<video>` elements contain a `<track>` element with `[kind="captions"]`

●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 an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○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

○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.

○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

○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.

Best Practices

Trust and Safety

All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being served over HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more about HTTPS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Insecure URL	Request Resolution
www.cornell.edu/assets/core/social-icons/linkedin-in-logo.svg	Automatically upgraded to HTTPS

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.

	URL	Displayed size	Actual size	Expected size
body.home > div#main > div.marquee-mask > img.image-replace `body.home > div#main > div.marquee-mask > img.image-replace`		412 x 232	16 x 9	618 x 348
Tweezers holding a tiny device. `div.marquee-mask > div.marquee > span#panobg-1A023AAE-0694-71F8-FF05A7CAD582F72F > img.marquee-img`	/photos/400x225/1A0BB4DE-BAC0-5DE3-C487894F3B5F68CE.jpg	412 x 232	400 x 225	618 x 348

General

Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Issue type
Mixed content

●Avoids deprecated APIs

●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

●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

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

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.

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
1 `div.container > div.marquee-controls > nav.pager > a.active`
2 `div.container > div.marquee-controls > nav.pager > a`

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

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`