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· 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.

60

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
/lite/1.2.0-beta/helper_styles.css0.0 ms291.1 KiB
/2BV563CzQeVx21jTBA/hwiELf9Yb1w1/fARXBBIUJAo/SxI/-W1pkOVU...21600.0 s149.0 KiB
assets.adobedtm.com/7e08552ade3f/1a8047d2b483/launch-f46125d37e44.min.js3600.0 s73.1 KiB
tfux.thermofisher.com/cdn/fonts/v2/HelveticaNeueforTFS-Md.woff20.0 ms39.8 KiB
tfux.thermofisher.com/cdn/fonts/v2/HelveticaNeueforTFS.woff20.0 ms39.1 KiB
tfux.thermofisher.com/cdn/fonts/v2/HelveticaNeueforTFS-Bd.woff20.0 ms39.0 KiB
tfux.thermofisher.com/cdn/fonts/v2/HelveticaNeueforTFS-Th.woff20.0 ms38.6 KiB
tfux.thermofisher.com/cdn/fonts/v2/HelveticaNeueforTFS-Lt.woff20.0 ms38.4 KiB
cdn1.adoberesources.net/alloy/2.23.0/alloy.min.js3600.0 s34.5 KiB
/is/image/thermofisherscientific/WB-14355329-HR-8192x1888...85975.0 s60.1 KiB
/etc/designs/komodo/clientlibs/base-jquery.min.8d1dd69327...86400.0 s44.8 KiB
/is/image/thermofisherscientific/wb49093_edu_1528x860:the...157072.0 s46.5 KiB
/is/image/thermofisherscientific/WB-13314087-PC-q2-26.jpg...9897.0 s17.2 KiB
www.thermofisher.com/search/searchbar/resources/js/searchbarv2.js86400.0 s30.0 KiB
/etc.clientlibs/tfsite/clientlibs/clientlib-site.min.1797...86400.0 s29.2 KiB
/is/image/Invitrogen/wb49317-np-1200x669:thermofisher-sma...6584.0 s15.3 KiB
/notice?c=teconsent&pcookie=true&js=nj&gtm=true&noticeTyp...3600.0 s14.1 KiB
/designsystem-cdn/libraries/core/komodo-core-web-componen...86400.0 s25.0 KiB
/is/image/thermofisherscientific/OF-14025474-WB-MK-FP-137...156102.0 s28.5 KiB
/is/image/thermofisherscientific/WB49637-pc-v2-656x368:th...29575.0 s15.3 KiB
chat-api.thermofisher.com/search/chat-launcher/chat-launcher.js86400.0 s21.9 KiB
komodo-web-components.s3.us-east-1.amazonaws.com/skins/core_variables.css0.0 ms8.5 KiB
www.thermofisher.com/dm-offers/offers.min.js86400.0 s20.1 KiB
/is/image/thermofisherscientific/OF-14043185-WB-1200x669:...85231.0 s18.4 KiB
/etc/designs/komodo/clientlibs/base-bootstrap.min.194d136...86400.0 s16.4 KiB
www.thermofisher.com/akam/13/7b39edf221600.0 s9.4 KiB
/designsystem-cdn/libraries/core/komodo-core-web-componen...86400.0 s12.3 KiB
/is/image/thermofisherscientific/OF-13292407-WB-PC:thermo...158095.0 s15.1 KiB
www.thermofisher.com/store/minicartv3/minicart.js86400.0 s11.7 KiB
www.thermofisher.com/dm-offers/dm-offer-style.css86400.0 s11.4 KiB
/etc.clientlibs/tfsite/clientlibs/clientlib-base.min.c501...86400.0 s9.7 KiB
/store/global-header-footer-static/tf/js/lt.2fcc55055ffa7...86400.0 s9.0 KiB
www.thermofisher.com/designsystem-cdn/css/komodo-icons.css86400.0 s8.7 KiB
/is/image/thermofisherscientific/WB-14217950-PC:thermofis...126615.0 s9.6 KiB
www.thermofisher.com/shared-static/scripts/global-variables-fallback.js86400.0 s8.0 KiB
/etc.clientlibs/tfsite/clientlibs/clientlib-base.min.4e86...86400.0 s6.6 KiB
/store/global-header-footer-static/tf/js/utilities.min.2f...86400.0 s5.9 KiB
/is/image/thermofisherscientific/WB-14355329-POD-02-600x7...85975.0 s5.9 KiB
/designsystem-cdn/libraries/core/komodo-core-web-componen...86400.0 s4.5 KiB
/is/image/thermofisherscientific/WB-14355329-POD-01-600x7...85975.0 s4.3 KiB
/7e08552ade3f/1a8047d2b483/016796604787/RC88def096fa2b413...3600.0 s2.1 KiB
/etc.clientlibs/tfsite/clientlibs/clientlib-site.min.0da5...86400.0 s4.0 KiB
/etc/designs/komodo/clientlibs/base-addons.min.3b6dd4e5f4...86400.0 s3.9 KiB
www.thermofisher.com/search/static/resources/js/signals.min.js86400.0 s3.2 KiB
/is/image/thermofisherscientific/WB-14355329-POD-03-600x7...85975.0 s2.7 KiB
www.thermofisher.com/designsystem-cdn/design-tokens/variables.css86400.0 s2.6 KiB
tfux.thermofisher.com/cdn/fonts/v2/kmd-fonts.css0.0 ms953 B
/etc.clientlibs/corpcommons/clientlibs/polyfill.min.ced9a...86400.0 s2.2 KiB
/designsystem-cdn/libraries/core/komodo-core-web-componen...86400.0 s2.0 KiB
www.thermofisher.com/store/v3/web-components/cart-nudge.js86400.0 s1.9 KiB
www.thermofisher.com/shared-static/scripts/global-functions-fallback.js86400.0 s1.6 KiB
/7e08552ade3f/1a8047d2b483/016796604787/RC7005d082e2dd4af...3600.0 s621 B
/7e08552ade3f/1a8047d2b483/016796604787/RC53c1bf8b962e4bc...3600.0 s597 B
identity.thermofisher.com/account-center/scripts/identityGlobal.min.js571265.0 s4.2 KiB
/7e08552ade3f/1a8047d2b483/016796604787/RCabb269afb2e14f9...3600.0 s560 B
www.thermofisher.com/designsystem-cdn/text-comp-icons/style.css86400.0 s840 B
/store/global-header-footer-static/tf/js/footer-base.min....86400.0 s811 B
/designsystem-cdn/libraries/core/komodo-core-web-componen...86400.0 s612 B
/designsystem-cdn/libraries/core/komodo-core-web-componen...86400.0 s579 B
/etc.clientlibs/tfsite/clientlibs/clientlib-dependencies....86400.0 s326 B
/etc.clientlibs/tfsite/clientlibs/clientlib-dependencies....86400.0 s316 B

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.4376070000000001] map[node:map[boundingRect:map[bottom:3689 height:2312 left:16 right:1334 top:1377 width:1318] lhId:page-11-DIV nodeLabel:Featured Education See all topics Gene therapy learning center From innovativ… path:1,HTML,1,BODY,25,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV selector:div.cmp-p-container > div#container-fd2232b888 > div.cmp-p-container > div#container-ba2ea4bbed snippet:<div id="container-ba2ea4bbed" class="cmp-container"> type:node] score:0.196809 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:143 height:1 left:0 right:1 top:142 width:1] lhId:page-19-IMG nodeLabel:1x1 image pixel for data collection path:1,HTML,1,BODY,13,IMG selector:body#page-74069a10a4 > img snippet:<img src="https://consent-insights-3c23a978f31a.herokuapp.com/api/v1/visits/capture?…" alt="1x1 image pixel for data collection"> type:node]] map[cause:Web font extra:map[type:url value:https://tfux.thermofisher.com/cdn/fonts/v2/HelveticaNeueforTFS-Bd.woff2]] map[cause:Web font extra:map[type:url value:https://tfux.thermofisher.com/cdn/fonts/v2/HelveticaNeueforTFS-Md.woff2]] map[cause:Web font extra:map[type:url value:https://tfux.thermofisher.com/cdn/fonts/v2/HelveticaNeueforTFS-Lt.woff2]] map[cause:Web font extra:map[type:url value:https://tfux.thermofisher.com/cdn/fonts/v2/HelveticaNeueforTFS-Th.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:3689 height:2312 left:16 right:1334 top:1377 width:1318] lhId:page-11-DIV nodeLabel:Featured Education See all topics Gene therapy learning center From innovativ… path:1,HTML,1,BODY,25,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV selector:div.cmp-p-container > div#container-fd2232b888 > div.cmp-p-container > div#container-ba2ea4bbed snippet:<div id="container-ba2ea4bbed" class="cmp-container"> type:node] score:0.112766 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:4236 height:11 left:1156 right:1172 top:4225 width:16] lhId:page-21-IMG nodeLabel:united states flag icon path:1,HTML,1,BODY,27,DIV,1,FOOTER,0,DIV,15,DIV,1,DIV,0,DIV,0,DIV,3,DIV,0,DIV,0,IMG selector:div.footer-legal-link > div.footer-legal-country > div.country-flag > img.country-flag-img snippet:<img class="country-flag-img" src="https:////www.thermofisher.com/store/global-header-footer-static/global/im…" alt="united states flag icon" data-uw-rm-ima-original="United States flag icon"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:3689 height:2312 left:16 right:1334 top:1377 width:1318] lhId:page-11-DIV nodeLabel:Featured Education See all topics Gene therapy learning center From innovativ… path:1,HTML,1,BODY,25,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV selector:div.cmp-p-container > div#container-fd2232b888 > div.cmp-p-container > div#container-ba2ea4bbed snippet:<div id="container-ba2ea4bbed" class="cmp-container"> type:node] score:0.049366 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:4236 height:11 left:1156 right:1172 top:4225 width:16] lhId:page-21-IMG nodeLabel:united states flag icon path:1,HTML,1,BODY,27,DIV,1,FOOTER,0,DIV,15,DIV,1,DIV,0,DIV,0,DIV,3,DIV,0,DIV,0,IMG selector:div.footer-legal-link > div.footer-legal-country > div.country-flag > img.country-flag-img snippet:<img class="country-flag-img" src="https:////www.thermofisher.com/store/global-header-footer-static/global/im…" alt="united states flag icon" data-uw-rm-ima-original="United States flag icon"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:1271 height:441 left:31 right:263 top:830 width:232] lhId:page-12-DIV nodeLabel:Catalog Number: A5256701 Fetal Bovine Serum, Value, bottle, 500 mL Price (USD)… path:1,HTML,1,BODY,25,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,3,DIV,0,CORE-CAROUSEL,0,CORE-CAROUSEL-ITEM,0,DIV selector:div > core-carousel#dm-tf-new-lower-price-nlp-recommendations > core-carousel-item.dm-tf-new-lower-price-nlp-recommendation-item > div.kmd-carousel__item snippet:<div class="kmd-carousel__item kmd-text-sml kmd-d-flex kmd-d-direction-column"> type:node] score:0.037531 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:2309 height:150 left:53 right:216 top:2159 width:163] lhId:page-20-IMG nodeLabel:Lipofectamine™ 2000 Transfection Reagent, 15 mL path:1,HTML,1,BODY,25,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,0,DIV,0,DIV,1,DIV,3,DIV,0,CORE-CAROUSEL,0,CORE-CAROUSEL-ITEM,0,DIV,0,DIV,0,DIV,0,A,0,IMG selector:div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm snippet:<img class="kmd-img-height-sm kmd-img-fit-contain dm-pod-image" alt="Lipofectamine™ 2000 Transfection Reagent, 15 mL" data-part-number="11668500" data-image-url="https://assets.thermofisher.com/TFS-Assets/BID/product-images/11668500_m5h…" data-position="1" src="https://assets.thermofisher.com/TFS-Assets/BID/product-images/11668500_m5h…"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:1271 height:441 left:559 right:791 top:830 width:232] lhId:page-13-CORE-CAROUSEL-ITEM nodeLabel:Catalog Number: 26619 PageRuler™ Plus Prestained Protein Ladder, 10 to 250 kDa… path:1,HTML,1,BODY,25,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,3,DIV,0,CORE-CAROUSEL,2,CORE-CAROUSEL-ITEM selector:div#at-track-click-1779773769710 > div > core-carousel#dm-tf-new-lower-price-nlp-recommendations > core-carousel-item.dm-tf-new-lower-price-nlp-recommendation-item snippet:<core-carousel-item class="dm-tf-new-lower-price-nlp-recommendation-item hydrated" data-id="26619" data-index="3" data-sku="26619" data-title="PageRuler™ Plus Prestained Protein Ladder, 10 to 250 kDa, 2 x 250 μL" data-attr-pname="PageRuler™ Plus Prestained Protein Ladder, 10 to 250 kDa, 2 x 250 μL" data-price="208.00" data-online-price="176.65" data-uom="EA" data-currency="USD" data-final-price="176.65" style="flex: 0 0 232px; scroll-snap-align: start; margin-right: 32px;"> type:node] score:0.035211 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:4236 height:11 left:1156 right:1172 top:4225 width:16] lhId:page-21-IMG nodeLabel:united states flag icon path:1,HTML,1,BODY,27,DIV,1,FOOTER,0,DIV,15,DIV,1,DIV,0,DIV,0,DIV,3,DIV,0,DIV,0,IMG selector:div.footer-legal-link > div.footer-legal-country > div.country-flag > img.country-flag-img snippet:<img class="country-flag-img" src="https:////www.thermofisher.com/store/global-header-footer-static/global/im…" alt="united states flag icon" data-uw-rm-ima-original="United States flag icon"> type:node]]] type:subitems]]]

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.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:52.671 source:map[column:7348 line:5 type:source-location url:https://assets.adobedtm.com/7e08552ade3f/1a8047d2b483/launch-f46125d37e44.min.js urlProvider:network]]]

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
Neuroscience Takes Flight: How Collaboration, Spaceflight, and... div#blog-template > div#post-2 > a.pull-left > img
/blog/wp-content/uploads/sites/25/2026/04/Neuroscience-ta...16.4 KiB13.8 KiB
Niton XL5e Handheld XRF Analyzer div#offerContent > div#dynamicOffer > div.offer-bkg-img > img
/is/image/thermofisherscientific/OF-14025474-WB-MK-FP-137...28.2 KiB11.1 KiB
SwiftArrayStudio Microarray Analyzer div > div#dynamicOffer > div.offer-bkg-img > img
/is/image/thermofisherscientific/WB-14355329-HR-8192x1888...59.8 KiB10.2 KiB
Advanced Verification in Pharmaceutical Manufacturing Using Raman... div#blog-template > div#post-0 > a.pull-left > img
/blog/wp-content/uploads/sites/9/2026/04/iStock-135515209...11.2 KiB8.6 KiB
Dubai Chocolate: The Viral Confection Driving Demand for Perfect... div#blog-template > div#post-1 > a.pull-left > img
/blog/wp-content/uploads/sites/5/2026/03/iStock-221332354...10.5 KiB7.9 KiB
Benchtop essentials div#offerContent > div#dynamicOffer > div.offer-bkg-img > img
/is/image/thermofisherscientific/WB-13314087-PC-q2-26.jpg...16.8 KiB7.8 KiB
Protein biology essentials div#offerContent > div#dynamicOffer > div.offer-bkg-img > img
/is/image/thermofisherscientific/WB49637-pc-v2-656x368:th...15.0 KiB5.9 KiB
Neuronal research products div#offerContent > div#dynamicOffer > div.offer-bkg-img > img
/is/image/thermofisherscientific/OF-13292407-WB-PC:thermo...14.7 KiB5.6 KiB
Gene therapy learning center div > div#dynamicOffer > div.offer-bkg-img > img
/is/image/thermofisherscientific/wb49093_edu_1528x860:the...46.1 KiB4.2 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.

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.

URLTransfer SizeDuration
tfux.thermofisher.com/cdn/fonts/v2/kmd-fonts.css953 B401 ms
/etc/designs/komodo/clientlibs/base-jquery.min.8d1dd69327...44.8 KiB
/store/global-header-footer-static/tf/js/lt.2fcc55055ffa7...9.0 KiB
/etc.clientlibs/tfsite/clientlibs/clientlib-site.min.1797...29.2 KiB82 ms
www.thermofisher.com/dm-offers/dm-offer-style.css11.4 KiB
/etc.clientlibs/tfsite/clientlibs/clientlib-dependencies....316 B
www.thermofisher.com/designsystem-cdn/design-tokens/variables.css2.6 KiB
www.thermofisher.com/designsystem-cdn/css/komodo-icons.css8.7 KiB
/etc.clientlibs/tfsite/clientlibs/clientlib-base.min.4e86...6.6 KiB
www.thermofisher.com/designsystem-cdn/text-comp-icons/style.css840 B

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: 468 ms
URLTime Spent
thermofisher.com/246 ms
www.thermofisher.com/222 ms
www.thermofisher.com/us/en/home.html0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
Featured Education See all topics Gene therapy learning center From innovativ… div.cmp-p-container > div#container-fd2232b888 > div.cmp-p-container > div#container-ba2ea4bbed
0.197
Featured Education See all topics Gene therapy learning center From innovativ… div.cmp-p-container > div#container-fd2232b888 > div.cmp-p-container > div#container-ba2ea4bbed
0.113
Featured Education See all topics Gene therapy learning center From innovativ… div.cmp-p-container > div#container-fd2232b888 > div.cmp-p-container > div#container-ba2ea4bbed
0.049
Catalog Number: A5256701 Fetal Bovine Serum, Value, bottle, 500 mL Price (USD)… div > core-carousel#dm-tf-new-lower-price-nlp-recommendations > core-carousel-item.dm-tf-new-lower-price-nlp-recommendation-item > div.kmd-carousel__item
0.038
Catalog Number: 26619 PageRuler™ Plus Prestained Protein Ladder, 10 to 250 kDa… div#at-track-click-1779773769710 > div > core-carousel#dm-tf-new-lower-price-nlp-recommendations > core-carousel-item.dm-tf-new-lower-price-nlp-recommendation-item
0.035
body#page-74069a10a4 body#page-74069a10a4
0.005
Search All header.header > div#hfGlobalHeader > div.main-header-container > div.search-container
0.001

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: 220 ms 332.5 KiB
URLTransfer SizeEst Savings
/lite/1.2.0-beta/helper_styles.css290.7 KiB288.8 KiB
/etc.clientlibs/tfsite/clientlibs/clientlib-site.min.1797...28.9 KiB28.7 KiB
/* Hash: 2fcc55055ffa73 Source: /tf/css/dist/header.min.css */ .hf-content{width:100%; … } …17.5 KiB15.0 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 250 ms 198.0 KiB
URLTransfer SizeEst Savings
cdn.userway.org/widgetapp/2022-01-10/remediation/remediation_1641814805298.js38.7 KiB36.4 KiB
cdn.userway.org/widgetapp/2022-01-10/widget_app_1641814805298.js52.6 KiB30.7 KiB
/2BV563CzQeVx21jTBA/hwiELf9Yb1w1/fARXBBIUJAo/SxI/-W1pkOVU...148.7 KiB29.8 KiB
cdn1.adoberesources.net/alloy/2.23.0/alloy.min.js34.3 KiB29.5 KiB
consent.trustarc.com/asset/thermofisher-custom-js.js/v/v1.7-172936.0 KiB25.6 KiB
/etc/designs/komodo/clientlibs/base-jquery.min.8d1dd69327...44.4 KiB24.5 KiB
assets.adobedtm.com/7e08552ade3f/1a8047d2b483/launch-f46125d37e44.min.js72.8 KiB21.5 KiB

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
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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 26.3 KiB
URLTransfer SizeEst Savings
chat-api.thermofisher.com/search/chat-launcher/chat-launcher.js21.5 KiB16.3 KiB
www.thermofisher.com/search/searchbar/resources/js/searchbarv2.js29.5 KiB7.1 KiB
/store/global-header-footer-static/tf/js/lt.2fcc55055ffa7...8.7 KiB3.0 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
Advanced Verification in Pharmaceutical Manufacturing Using Raman... div#blog-template > div#post-0 > a.pull-left > img
/blog/wp-content/uploads/sites/9/2026/04/iStock-135515209...
Dubai Chocolate: The Viral Confection Driving Demand for Perfect... div#blog-template > div#post-1 > a.pull-left > img
/blog/wp-content/uploads/sites/5/2026/03/iStock-221332354...
Neuroscience Takes Flight: How Collaboration, Spaceflight, and... div#blog-template > div#post-2 > a.pull-left > img
/blog/wp-content/uploads/sites/25/2026/04/Neuroscience-ta...
DPBS, no calcium, no magnesium, 20 L bag div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/14190359_Gibco DPBS no cal...
DPBS, no calcium, no magnesium, 500 mL bottle div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/14190144-STD-00-1280x1280....
Fetal Bovine Serum, Value, bottle, 500 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/23-6973318-A5256701-STD-00...
PageRuler™ Plus Prestained Protein Ladder, 10 to 250 kDa, 2 x 250 μL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/26619-pageruler-mw-ladder....
Pierce™ BCA Protein Assay Kit, 1 Kit (1 L) div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/23225-BCA-Assay-Kit.jpg-15...
Pierce™ Streptavidin Coated High Capacity Plates, Clear, 96-Well, 5 plates div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/15500-Strept-Plates.jpg-15...
Viral Production Medium, 10 L div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/25-12870831-A4817903-STD-0...
Fetal Bovine Serum, Premium Plus, heat inactivated, 500 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/23-6973227-A5669801 -STD-0...
Fetal Bovine Serum, Value, heat inactivated, 500 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/23-6973400-A5256801-STD-00...
Matrix™ 0.64 mL V-Bottom ScrewTop Tubes in Barcoded Latch Racks, Clear/Colorless div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/CCG/Thermo-Scientific/product-images/20-15911...
SYBR™ Safe DNA Gel Stain div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
assets.thermofisher.com/TFS-Assets/LSG/product-images/S33102_650x600.jpg-150.jpg
DMEM, high glucose, pyruvate, 500 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/BID/product-images/11995065_650x600.jpg-150.jpg
Lipofectamine™ 2000 Transfection Reagent, 15 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/BID/product-images/11668500_m5h5_650x600.jpg-...
TaqMan™ Fast Advanced Master Mix for qPCR, 10 x 5 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/4444557-650x600.jpg-150.jpg
Quant-iT™ dsDNA Assay Kit, high sensitivity, 1 kit div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
assets.thermofisher.com/TFS-Assets/LSG/product-images/Q33120_640x600.jpg-150.jpg
SuperScript™ IV One-Step RT-PCR System with ezDNase™, 100 rxns div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/BID/product-images/12595100-650x600.jpg-150.jpg
TaqPath™ 1-Step RT-qPCR Master Mix, CG, 1 x 10 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/A15300_TaqPath-1-Step_RT-q...
Platinum™ SuperFi II DNA Polymerase, 5 x 500 reactions div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/BID/product-images/12361250_650x600.jpg-150.jpg
TaqMan™ Fast Virus 1-Step Master Mix for qPCR, 5 x 1 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/4444434-650x600.jpg-150.jpg
SuperScript™ IV First-Strand Synthesis System, Each div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/18091200-650x600.jpg-150.jpg
TaqMan™ Universal PCR Master Mix (individually packaged), 10 x 5 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/4304437-650x600.jpg-150.jpg
TaqMan™ Fast Virus 1-Step Master Mix for qPCR, 1 x 10 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/4444436-650x600.jpg-150.jpg
Pierce™ Streptavidin Magnetic Beads, 5 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/88817-SA-Magnetic-Beads.jp...
TaqPath™ qPCR Master Mix, CG, 1 x 50 mL div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/A15298_TaqPath-qPCR-Master...
DMEM, high glucose, pyruvate, 10 L div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/BID/product-images/11995123_Gibco_DMEM_wf1661...
TMTpro™ 18-plex Label Reagent Set, 1 x 5 mg div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/BID/product-images/A52045_md50_650x600.jpg-15...
SuperScript™ II Reverse Transcriptase, 4 x 10,000 units div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/18064071-650x600.jpg-150.jpg
Multidrop™ Combi Accessories, Small tube metal tip dispensing cassette div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
assets.thermofisher.com/TFS-Assets/LED/product-images/F76107_p.eps-150.jpg
MitoSOX™ Red Mitochondrial Superoxide Indicator, for live-cell imaging, 10 vial… div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
assets.thermofisher.com/TFS-Assets/LSG/product-images/M36008_0630.jpg-150.jpg
ExpiFectamine™ 293 Transfection Kit, For 50 L of culture div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
assets.thermofisher.com/TFS-Assets/LSG/product-images/A14526_10IN.jpg-150.jpg
Custom TaqMan™ SNP Genotyping Assay, non-human, L (2400 reactions), made to ord… div.kmd-card__header > div.kmd-text-center > a > img.kmd-img-height-sm
/TFS-Assets/LSG/product-images/22-5319492-Group 1-RET.jpg...
Feedback body#page-74069a10a4 > span#customKampyleButtonContainer > button#nebula_div_btn > img
/content/dam/LifeTech/global/shared/images/feedback/givef...
united states flag icon div.footer-legal-link > div.footer-legal-country > div.country-flag > img.country-flag-img
/store/global-header-footer-static/global/images/flags/us...
1x1 image pixel for data collection body#page-74069a10a4 > img
/api/v1/visits/capture?api_key=CI-3929813243&secret=81027...
1x1 image pixel for data collection body#page-74069a10a4 > img
/api/v1/impressions/capture?api_key=CI-3929813243&secret=...

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

●Optimize DOM size
●Font display
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Avoids enormous network payloads Total size was 1,947 KiB
●User Timing marks and measures 40 user timings
●JavaScript execution time 0.8 s
●Minimizes main-thread work 2.0 s
●Avoid long main-thread tasks 4 long tasks found
●Avoid non-composited animations 1 animated element found
●Network Requests
●Network Round Trip Times 60 ms
●Server Backend Latencies 100 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 40 ms
○INP breakdown
80

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

Each ARIA `role` supports a specific subset of `aria-*` attributes. Mismatching these invalidates the `aria-*` attributes. Learn how to match ARIA attributes to their roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#generalSearchInput > div#header-typeahead-input-container > div.suggest1_wrapper > input#suggest1 div#generalSearchInput > div#header-typeahead-input-container > div.suggest1_wrapper > input#suggest1

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.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#generalSearch > form#smartsearch > div.general_search > button#searchButton div#generalSearch > form#smartsearch > div.general_search > button#searchButton

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#offerContent > div#dynamicOffer > div.entireClickable > a div#offerContent > div#dynamicOffer > div.entireClickable > a
div#commerce-bar > ul.quick-menu > li.cart > a#cart-link div#commerce-bar > ul.quick-menu > li.cart > a#cart-link
div > div#dynamicOffer > div.entireClickable > a div > div#dynamicOffer > div.entireClickable > a
div > div#dynamicOffer > div.entireClickable > a div > div#dynamicOffer > div.entireClickable > a
div > div#dynamicOffer > div.entireClickable > a div > div#dynamicOffer > div.entireClickable > a
div > div#dynamicOffer > div.entireClickable > a div > div#dynamicOffer > div.entireClickable > a
div > div#dynamicOffer > div.entireClickable > a div > div#dynamicOffer > div.entireClickable > a
div > div#dynamicOffer > div.entireClickable > a div > div#dynamicOffer > div.entireClickable > a
div#offerContent > div#dynamicOffer > div.entireClickable > a div#offerContent > div#dynamicOffer > div.entireClickable > a
div#offerContent > div#dynamicOffer > div.entireClickable > a div#offerContent > div#dynamicOffer > div.entireClickable > a
div#offerContent > div#dynamicOffer > div.entireClickable > a div#offerContent > div#dynamicOffer > div.entireClickable > a
div#offerContent > div#dynamicOffer > div.entireClickable > a div#offerContent > div#dynamicOffer > div.entireClickable > a
div#offerContent > div#dynamicOffer > div.entireClickable > a div#offerContent > div#dynamicOffer > div.entireClickable > a
div#offerContent > div#dynamicOffer > div.entireClickable > a div#offerContent > div#dynamicOffer > div.entireClickable > a
div#offerContent > div#dynamicOffer > div.entireClickable > a div#offerContent > div#dynamicOffer > div.entireClickable > 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.

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

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Fetal Bovine Serum, Value, bottle, 500 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
SYBR™ Safe DNA Gel Stain div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
PageRuler™ Plus Prestained Protein Ladder, 10 to 250 kDa, 2 x 250 μL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Pierce™ BCA Protein Assay Kit, 1 Kit (1 L) div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
DMEM, high glucose, pyruvate, 500 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
DPBS, no calcium, no magnesium, 500 mL bottle div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
MitoSOX™ Red Mitochondrial Superoxide Indicator, for live-cell imaging, 10 vial… div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Lipofectamine™ 2000 Transfection Reagent, 15 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
TaqMan™ Fast Advanced Master Mix for qPCR, 10 x 5 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Pierce™ Streptavidin Coated High Capacity Plates, Clear, 96-Well, 5 plates div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Quant-iT™ dsDNA Assay Kit, high sensitivity, 1 kit div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Custom TaqMan™ SNP Genotyping Assay, non-human, L (2400 reactions), made to ord… div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
SuperScript™ IV One-Step RT-PCR System with ezDNase™, 100 rxns div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
TaqPath™ 1-Step RT-qPCR Master Mix, CG, 1 x 10 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Platinum™ SuperFi II DNA Polymerase, 5 x 500 reactions div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
TaqMan™ Fast Virus 1-Step Master Mix for qPCR, 5 x 1 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Viral Production Medium, 10 L div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
SuperScript™ IV First-Strand Synthesis System, Each div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Multidrop™ Combi Accessories, Small tube metal tip dispensing cassette div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Fetal Bovine Serum, Premium Plus, heat inactivated, 500 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
TaqMan™ Universal PCR Master Mix (individually packaged), 10 x 5 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Fetal Bovine Serum, Value, heat inactivated, 500 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
DPBS, no calcium, no magnesium, 20 L bag div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
TaqMan™ Fast Virus 1-Step Master Mix for qPCR, 1 x 10 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Matrix™ 0.64 mL V-Bottom ScrewTop Tubes in Barcoded Latch Racks, Clear/Colorless div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
ExpiFectamine™ 293 Transfection Kit, For 50 L of culture div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
Pierce™ Streptavidin Magnetic Beads, 5 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
TaqPath™ qPCR Master Mix, CG, 1 x 50 mL div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
DMEM, high glucose, pyruvate, 10 L div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
TMTpro™ 18-plex Label Reagent Set, 1 x 5 mg div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > a
SuperScript™ II Reverse Transcriptase, 4 x 10,000 units div.kmd-carousel__item > div.kmd-card__header > div.kmd-text-center > 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-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
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[accesskey]` values are unique
●`button`, `link`, and `menuitem` elements have accessible names
●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
●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 are distinguishable without relying on color.
●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.
●`[lang]` attributes have a valid value
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
●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.
○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
○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
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○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.
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○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.
96

Best Practices

General

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
www.thermofisher.com/us/en/home.html line 488, col 5228
ReferenceError: digitalData is not defined at Object.processOOBCartDetails (https://www.thermofisher.com/us/en/home.html:489:5229) at t.onreadystatechange (https://www.thermofisher.com/us/en/home.html:489:4694)
www.thermofisher.com/shared-static/scripts/global-variables-fallback.js
SyntaxError: Identifier 'domain_list' has already been declared
cdn.userway.org/widgetapp/2022-01-10/remediation/remediation_1641814805298.js line 2, col 2666
Uncaught TypeError: Cannot read properties of undefined (reading 'quotaExceeded')
●Uses HTTPS
●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
●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 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
85

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
/newsroom/press-releases/press-release-details/2026/Therm...Learn more
/us/en/home/clinical/cell-gene-therapy/cell-gene-therapy-...Learn more
/us/en/home/materials-science/battery-research/extrusion-...Learn more
/uk/en/home/global/forms/bioprocessing/cell-culture/chova...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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
Search All div.header_row_2 > div#focusAreaSelector > div#focusAreaSelector > a.chosen-single
div#commerce-bar > ul.quick-menu > li.cart > a#cart-link div#commerce-bar > ul.quick-menu > li.cart > a#cart-link

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
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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