Skip to content
https://unam.mx

Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
SCORE
0
GRADE
FIX
0
REVIEW
0
PASS
0
INFO
0

Detailed Report

Audit breakdown by category with detailed findings.

62

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
www.unam.mx/sites/default/files/images/carrusel/banneranimado-ok.gif1800.0 s1.3 MiB
www.unam.mx/sites/default/files/images/eventos/300.gif1800.0 s230.8 KiB
/sites/default/files/images/carrusel/260420-portada-gacet...1800.0 s129.8 KiB
/sites/default/files/images/carrusel/banner-1960x600-beca...1800.0 s128.0 KiB
www.unam.mx/sites/default/files/images/carrusel/500-historias-1960x600.jpg1800.0 s111.2 KiB
connect.facebook.net/es_LA/bundle/sdk.js/1200.0 s77.8 KiB
www.unam.mx/sites/default/files/images/carrusel/banner-8m-2026.jpg1800.0 s48.9 KiB
i.ytimg.com/vi_webp/DStkZOFgcMU/sddefault.webp300.0 s37.7 KiB
platform.twitter.com/widgets.js1800.0 s27.3 KiB
/sites/default/files/images/gaceta/lunes_20_abril_2026_ga...1800.0 s25.9 KiB
www.unam.mx/sites/default/files/images/boletines/2341.jpg1800.0 s24.4 KiB
www.unam.mx/sites/default/files/images/eventos/pt-2026.jpg1800.0 s21.0 KiB
www.unam.mx/sites/default/files/images/boletines/2351.jpg1800.0 s19.1 KiB
/sites/default/files/js/js_rR1UpFcxYbve0531qs7TKMKfw50KNI...1800.0 s18.9 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
www.unam.mx/sites/default/files/images/eventos/informe2025.jpg1800.0 s15.8 KiB
/sites/default/files/css/css_uc1RcvZeZUNveo7aHETNpsDro7gP...1800.0 s15.2 KiB
www.unam.mx/sites/default/files/images/campanias/llvr.jpg1800.0 s10.8 KiB
www.unam.mx/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?14400.0 s12.1 KiB
/sites/default/files/js/js_dWhBODswdXXk1M5Z5nyqNfGljmqwxU...1800.0 s8.9 KiB
/sites/default/files/css/css_JLCP4n47Z8AISwIm1s1TnuIbTc65...1800.0 s8.5 KiB
www.unam.mx/sites/default/files/images/campanias/ptu.jpg1800.0 s8.1 KiB
/sites/default/files/js/js_xVdESRffMtg-VD1YEgI9Mt1hde2nAM...1800.0 s6.7 KiB
www.unam.mx/sites/all/themes/unam/logo.png1800.0 s6.2 KiB
www.unam.mx/sites/default/files/images/campanias/cigu-abajo.jpg1800.0 s6.2 KiB
connect.facebook.net/es_LA/sdk.js#xfbml=1&version=v2.111200.0 s5.1 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...86400.0 s10.7 KiB
cse.google.com/cse.js?cx=000862918480106004188:wi2hxgsc9de0.0 ms3.3 KiB
www.unam.mx/sites/all/themes/unam/images/jquery-ui/ui-icons_ffffff_256x240.png1800.0 s3.8 KiB
/sites/default/files/js/js_SpbJAG1Bu1guk20fiA-z1XncJHF44B...1800.0 s3.8 KiB
/sites/default/files/css/css_Q7R7Blo9EYqLDI5rIlO_T3uTFBjI...1800.0 s2.9 KiB
/sites/default/files/css/css_dWBHPbSQWh-19e3Bc29cTHIsefj-...1800.0 s2.6 KiB
www.unam.mx/sites/all/libraries/superfish/images/shadow.png1800.0 s2.4 KiB
www.unam.mx/sites/default/files/tiktok-ok.jpg1800.0 s2.3 KiB
www.unam.mx/sites/default/files/images/ingles.jpg1800.0 s2.2 KiB
www.unam.mx/sites/default/files/images/logo_instagram_70.jpg1800.0 s2.1 KiB
www.unam.mx/sites/default/files/images/logo-global_0.png1800.0 s2.1 KiB
www.unam.mx/sites/default/files/images/social/twitter-x_0.png1800.0 s1.5 KiB
www.unam.mx/sites/default/files/images/social/mail.png1800.0 s1.4 KiB
www.unam.mx/sites/default/files/images/social/facebook.png1800.0 s1.4 KiB
www.unam.mx/sites/default/files/images/frances.jpg1800.0 s1.4 KiB
/sites/default/files/css/css_lQaZfjVpwP_oGNqdtWCSpJT1EMqX...1800.0 s1.3 KiB
www.google.com/cse/static/style/look/v6/default.css3000.0 s1.2 KiB
www.unam.mx/sites/default/files/images/social/rss.png1800.0 s1.1 KiB
/sites/default/files/js/js_o0NmOA6FrOQamIKXP181IN2QejpF72...1800.0 s1.1 KiB
www.unam.mx/sites/default/files/newsletter-unam.jpg1800.0 s1.0 KiB
www.unam.mx/sites/default/files/images/social/youtube.png1800.0 s1015 B
www.unam.mx/sites/all/libraries/superfish/style/simple/images/simple-arrows.png1800.0 s551 B
www.unam.mx/sites/all/themes/unam/images/anterior.png1800.0 s536 B
www.unam.mx/sites/all/themes/unam/images/bullet_magenta.png1800.0 s512 B
static.doubleclick.net/instream/ad_status.js900.0 s494 B
www.unam.mx/sites/all/themes/unam/images/bg_cabecera.png1800.0 s459 B
/sites/all/themes/unam/images/jquery-ui/ui-bg_flat_65_048...1800.0 s446 B
/sites/all/themes/unam/images/jquery-ui/ui-bg_flat_75_048...1800.0 s442 B
/sites/all/themes/unam/images/jquery-ui/ui-bg_flat_75_fff...1800.0 s423 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:0.32646] map[node:map[boundingRect:map[bottom:1640 height:1122 left:185 right:1165 top:519 width:980] lhId:page-14-DIV nodeLabel:21 ABR BOLETÍN UNAM-2026/235 Gonzalo Celorio, Premio Cervantes 2025, resguarda … path:6,HTML,2,BODY,1,DIV,1,DIV,3,DIV selector:body.html > div#page > div#main > div#content snippet:<div id="content" class="column" role="main"> type:node] score:0.32646 subItems:map[items:[map[cause:Unsized image element]] 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:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:32.812 source:map[column:9837 line:2 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:10.72 source:map[type:text value:[unattributed]]] map[reflowTime:0.685 source:map[column:21731 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:0.296 source:map[column:21828 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:0.217 source:map[column:22058 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:0.175 source:map[column:22485 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:0.257 source:map[column:22640 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:0.257 source:map[column:22785 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:0.316 source:map[column:41 line:778 type:source-location url:https://www.unam.mx/sites/default/files/js/js_dWhBODswdXXk1M5Z5nyqNfGljmqwxUwAK9i6D0YSDNs.js urlProvider:network]] map[reflowTime:6.002 source:map[column:75373 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:17.54 source:map[column:76049 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:1.777 source:map[column:3477 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:0.688 source:map[column:75395 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:1.62 source:map[column:504 line:116 type:source-location url:https://www.unam.mx/sites/default/files/js/js_xVdESRffMtg-VD1YEgI9Mt1hde2nAMJ-UvxnP-vdHvQ.js urlProvider:network]] map[reflowTime:0.753 source:map[column:93259 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:2.229 source:map[column:77143 line:1 type:source-location url:https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js urlProvider:network]] map[reflowTime:0.715 source:map[column:278 line:92 type:source-location url:https://www.google-analytics.com/analytics.js urlProvider:network]] map[reflowTime:1.624 source:map[column:8327 line:0 type:source-location url:https://www.unam.mx/cdn-cgi/challenge-platform/scripts/jsd/main.js urlProvider:network]] map[reflowTime:1.174 source:map[column:10449 line:7 type:source-location url:https://platform.twitter.com/widgets.js urlProvider:network]] map[reflowTime:9.474 source:map[column:280 line:387 type:source-location url:https://www.google.com/cse/static/element/dc329f57de078f5d/cse_element__es.js?usqp=CAM%3D urlProvider:network]] map[reflowTime:1.549 source:map[column:390 line:538 type:source-location url:https://www.google.com/cse/static/element/dc329f57de078f5d/cse_element__es.js?usqp=CAM%3D urlProvider:network]] map[reflowTime:2.803 source:map[column:1998 line:202 type:source-location url:https://connect.facebook.net/es_LA/bundle/sdk.js/ urlProvider:network]] map[reflowTime:0.715 source:map[column:46511 line:7 type:source-location url:https://platform.twitter.com/widgets.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
475 aniversario de la Universidad de México div.owl-item > div > a > img
www.unam.mx/sites/default/files/images/carrusel/banneranimado-ok.gif1.3 MiB1.2 MiB
Nuestro video institucional, en varios idiomas: UNAM, Somos la Universidad de … div.views-field > div.field-content > a > img
www.unam.mx/sites/default/files/images/eventos/300.gif230.4 KiB218.7 KiB
Gaceta UNAM div.owl-item > div > a > img
/sites/default/files/images/carrusel/260420-portada-gacet...129.4 KiB97.1 KiB
Becas UNAM div.owl-item > div > a > img
/sites/default/files/images/carrusel/banner-1960x600-beca...127.7 KiB95.7 KiB
UNAM Global TV div.owl-item > div > a > img
www.unam.mx/sites/default/files/images/carrusel/500-historias-1960x600.jpg110.8 KiB83.1 KiB
8M, Día Internacional de las Mujeres div.owl-item > div > a > img
www.unam.mx/sites/default/files/images/carrusel/banner-8m-2026.jpg48.5 KiB36.4 KiB
Lunes 20 de abril de 2026. El arte de gobernar (en tiempos de incertidumbre) de… div.views-field > div.field-content > a > img
/sites/default/files/images/gaceta/lunes_20_abril_2026_ga...25.5 KiB21.0 KiB
Programa de Trabajo Anual 2026 div.views-field > div.field-content > a > img
www.unam.mx/sites/default/files/images/eventos/pt-2026.jpg20.7 KiB18.3 KiB
Gobernar, labor compleja: Patricia Dolores Dávila Aranda div.views-field > div.field-content > a > img
www.unam.mx/sites/default/files/images/boletines/2341.jpg24.1 KiB18.1 KiB
Informe anual de actividades div.views-field > div.field-content > a > img
www.unam.mx/sites/default/files/images/eventos/informe2025.jpg15.4 KiB13.6 KiB
Gonzalo Celorio, Premio Cervantes 2025, resguarda su legado en la Caja de las L… div.views-field > div.field-content > a > img
www.unam.mx/sites/default/files/images/boletines/2351.jpg18.1 KiB12.2 KiB
Página del Rector div.views-field > div.field-content > a > img
www.unam.mx/sites/default/files/images/campanias/llvr.jpg10.5 KiB8.2 KiB
Portal de Transparencia Universitaria, UNAM, México, 2022 div.views-field > div.field-content > a > img
www.unam.mx/sites/default/files/images/campanias/ptu.jpg7.7 KiB6.1 KiB
Coordinación para la Igualdad de Género div.views-field > div.field-content > a > img
www.unam.mx/sites/default/files/images/campanias/cigu-abajo.jpg5.8 KiB4.6 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-2-IMG
nodeLabel: Gaceta UNAM
path: 6,HTML,2,BODY,1,DIV,1,DIV,1,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,A,0,IMG
selector: div.owl-item > div > a > img
snippet: <img typeof="foaf:Image" src="https://www.unam.mx/sites/default/files/images/carrusel/260420-portada-gac…" width="1960" height="600" alt="Gaceta UNAM">

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
ajax.googleapis.com/ajax/libs/jqueryui/1.10.2/jquery-ui.min.js59.3 KiB121 ms
ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js33.4 KiB329 ms
/sites/default/files/js/js_SpbJAG1Bu1guk20fiA-z1XncJHF44B...3.8 KiB80 ms
/sites/default/files/js/js_o0NmOA6FrOQamIKXP181IN2QejpF72...1.1 KiB80 ms
/sites/default/files/js/js_xVdESRffMtg-VD1YEgI9Mt1hde2nAM...6.7 KiB80 ms
/sites/default/files/js/js_dWhBODswdXXk1M5Z5nyqNfGljmqwxU...8.9 KiB257 ms
/sites/default/files/css/css_uc1RcvZeZUNveo7aHETNpsDro7gP...15.2 KiB257 ms
/sites/default/files/css/css_dWBHPbSQWh-19e3Bc29cTHIsefj-...2.6 KiB198 ms
/sites/default/files/css/css_JLCP4n47Z8AISwIm1s1TnuIbTc65...8.5 KiB198 ms
/sites/default/files/css/css_Q7R7Blo9EYqLDI5rIlO_T3uTFBjI...2.9 KiB198 ms
/sites/default/files/css/css_lQaZfjVpwP_oGNqdtWCSpJT1EMqX...1.3 KiB80 ms

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.

URLEst Savings
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff215 ms
/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBHMdazT...15 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 581 ms
URLTime Spent
www.unam.mx/681 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
21 ABR BOLETÍN UNAM-2026/235 Gonzalo Celorio, Premio Cervantes 2025, resguarda … body.html > div#page > div#main > div#content
0.326

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 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: 120 ms 253.7 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtag/js?id=G-R800EXT5K9&cx=c&_slc=1159.7 KiB66.7 KiB
/cse/static/element/dc329f57de078f5d/cse_element__es.js?u...102.9 KiB52.6 KiB
ajax.googleapis.com/ajax/libs/jqueryui/1.10.2/jquery-ui.min.js59.3 KiB51.9 KiB
connect.facebook.net/es_LA/bundle/sdk.js/77.7 KiB51.0 KiB
cse.google.com/adsense/search/async-ads.js43.3 KiB31.5 KiB

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 3.3 KiB
URLTransfer SizeEst Savings
www.google.com/cse/static/element/dc329f57de078f5d/default_v6+es.css12.0 KiB3.3 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 12.0 KiB
URLTransfer SizeEst Savings
/sites/default/files/js/js_rR1UpFcxYbve0531qs7TKMKfw50KNI...18.6 KiB6.1 KiB
/sites/default/files/js/js_dWhBODswdXXk1M5Z5nyqNfGljmqwxU...8.6 KiB5.9 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: 0.0 ms 23.1 KiB
URLTransfer SizeEst Savings
/sites/default/files/css/css_uc1RcvZeZUNveo7aHETNpsDro7gP...14.9 KiB11.7 KiB
www.google.com/cse/static/element/dc329f57de078f5d/default_v6+es.css11.9 KiB11.5 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.

URLTransfer Size
www.unam.mx/sites/default/files/images/carrusel/banneranimado-ok.gif1.3 MiB
www.youtube.com/s/player/218d9d92/player_embed_es6.vflset/en_US/base.js435.8 KiB
www.unam.mx/sites/default/files/images/eventos/300.gif230.8 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.CYE28xQTWxU.2021...193.0 KiB
www.googletagmanager.com/gtag/js?id=G-R800EXT5K9&cx=c&_slc=1160.0 KiB
/s/_/ytembeds/_/js/k=ytembeds.base.en_US.CYE28xQTWxU.2021...146.3 KiB
/sites/default/files/images/carrusel/260420-portada-gacet...129.8 KiB
/sites/default/files/images/carrusel/banner-1960x600-beca...128.0 KiB
www.unam.mx/sites/default/files/images/carrusel/500-historias-1960x600.jpg111.2 KiB
/widgets/widget_iframe.2f70fb173b9000da126c79afe2098f02.h...103.4 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
Inicio div#page > header#header > a#logo > img.header__logo-image
www.unam.mx/sites/all/themes/unam/logo.png
Facebook de la UNAM div#block-block-11 > p > a > img
www.unam.mx/sites/default/files/images/social/facebook.png
Canal de la UNAM en youtube div#block-block-11 > p > a > img
www.unam.mx/sites/default/files/images/social/youtube.png
Dudas y comentarios div#block-block-11 > p > a > img
www.unam.mx/sites/default/files/images/social/mail.png

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

●Max Potential First Input Delay 100 ms
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●User Timing marks and measures 5 user timings
●JavaScript execution time 0.7 s
●Minimizes main-thread work 1.6 s
●Avoid long main-thread tasks 4 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 40 ms
●Server Backend Latencies 150 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Avoid multiple page redirects
○INP breakdown
○Avoid non-composited animations
85

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

Some ARIA parent roles must contain specific child roles to perform their intended accessibility functions. Learn more about roles and required children elements.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Facebook X div.inside > div#block-block-6 > div#accordion > div#jquery-ui-filter

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
7 ABR 2026 div.views-row > div.views-field > div.field-content > span.date-display-single
7 ABR 2026 div.views-row > div.views-field > div.field-content > span.date-display-single
1 MAYO 2023 div.views-row > div.views-field > div.field-content > span.date-display-single
Eventos div.view > div.view-footer > p > a
Créditos div.region > div#block-bloque-legales-bloque-legales > p > a
Conoce el Portal div.region > div#block-bloque-legales-bloque-legales > p > a#tour-conoce

These are opportunities to improve the legibility of your content.

Names and labels

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.field-items > div.field-item > p > iframe div.field-items > div.field-item > p > iframe

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

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
Facebook div#accordion > div#jquery-ui-filter > div#ui-accordion-jquery-ui-filter-header-0 > a
Protección de Datos Personales div#block-menu-menu-men-del-pie > ul.menu > li.menu__item > a.menu__link
Transparencia Universitaria div#block-menu-menu-men-del-pie > ul.menu > li.menu__item > a.menu__link
Teléfonos y medidas de emergencia div#block-menu-menu-men-del-pie > ul.menu > li.menu__item > a.menu__link
Preguntas frecuentes div#block-menu-menu-men-del-pie > ul.menu > li.menu__item > a.menu__link
Mapa de sitio div#block-menu-menu-men-del-pie > ul.menu > li.menu__item > a.menu__link

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-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[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
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[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 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
●No element has a `[tabindex]` value greater than 0
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●All heading elements contain content.
●Identical links have the same purpose.
○`[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
○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
○`<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
○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.
○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>`.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○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.
81

Best Practices

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
SharedStorage
www.unam.mx/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
www.unam.mx/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge
www.unam.mx/cdn-cgi/challenge-platform/scripts/jsd/main.js
●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
●Serves images with appropriate resolution
●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 DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
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
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`
○robots.txt is valid

Send Feedback