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
/stackoverflow-M6HzSe6yue/mapping.base/prebid-wrapper.js	3600.0 s	84.0 KiB
cdn.cookielaw.org/scripttemplates/202602.1.0/otBannerSdk.js	86400.0 s	129.0 KiB
askubuntu.com/Content/Img/favicons-sprite32.png?v=91e30776b0a0	604800.0 s	275.2 KiB
/stackoverflow-M6HzSe6yue/mapping.base/prebid-load.js	3600.0 s	16.5 KiB
askubuntu.com/Content/Shared/stacks.css?v=b2264ccf0463	604800.0 s	110.2 KiB
raven-static.aditude.io/prod/1.19.14-y0ptsc/raven.js	604800.0 s	107.2 KiB
cdn.cookielaw.org/scripttemplates/202602.1.0/otGPP.js	86400.0 s	22.2 KiB
askubuntu.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?	14400.0 s	12.7 KiB
cdn.cookielaw.org/scripttemplates/202602.1.0/otTCF.js	86400.0 s	17.7 KiB
askubuntu.com/Content/Sites/askubuntu/primary.css?v=3dc445ae4447	604800.0 s	69.6 KiB
htlbid.com/v3/mapping.base/htlbid.js?v=1.4	600.0 s	7.3 KiB
cdn.cookielaw.org/scripttemplates/otSDKStub.js	86400.0 s	8.8 KiB
askubuntu.com/Content/Js/webpack-chunks/svelte.en.js?v=f773033c4e0b	604800.0 s	32.1 KiB
/Content/Js/third-party/npm/@stackoverflow/stacks/dist/js...	604800.0 s	30.5 KiB
raven-edge.aditude.io/raven/stackoverflow-main-I67Hg/library.js	300.0 s	2.6 KiB
/components/htl-injector-component.6f9fd855080891057769.js	86400.0 s	5.2 KiB
askubuntu.com/Content/Js/stub.en.js?v=e307fb81e738	604800.0 s	18.0 KiB
/components/creative-timed-refresh-component.a1a922b43837...	86400.0 s	4.1 KiB
/avatar/95cce5868ee57127e271ac7c6b513ee2?s=32&d=identicon...	300.0 s	1.7 KiB
/avatar/743571ff47ba100670d94ce757b72013?s=32&d=identicon...	300.0 s	1.7 KiB
/avatar/fea55afdf96c95e25054f78a31ef9fe2?s=32&d=identicon...	300.0 s	1.5 KiB
/avatar/75d4295aaf87cf6e15a767bee7699ee0?s=32&d=identicon...	300.0 s	1.5 KiB
www.gravatar.com/avatar/9a196d5a17b853eccec2b981fe52af1c?s=32&d=identicon&r=PG	300.0 s	1.4 KiB
/avatar/686701359124921d301b9f9e34e89c2f?s=32&d=identicon...	300.0 s	1.4 KiB
askubuntu.com/Content/Js/webpack-chunks/stacks-svelte.en.js?v=297d3b9a88f6	604800.0 s	12.8 KiB
/components/htl-prebid-floors-component.d3bc1be21aeafbc98...	86400.0 s	2.9 KiB
/components/first-party-data-component.9031b6342187473708...	86400.0 s	2.9 KiB
www.gravatar.com/avatar/a007be5a61f6aa8f3e85ae2fc18dd66e?s=32&d=identicon&r=PG	300.0 s	917 B
askubuntu.com/Content/Js/webpack-chunks/9366.en.js?v=c8d4e4e64bf3	604800.0 s	8.6 KiB
cdn.cookielaw.org/scripttemplates/gpp.stub.js	86400.0 s	2.1 KiB
askubuntu.com/Content/Js/islands/signup-modal.en.js?v=f64ec881ea96	604800.0 s	8.4 KiB
/components/throttle-refresh-component.de8e70e8b17a42bbf0...	86400.0 s	1.6 KiB
/components/refresh-all-ads-component.db7de998acab3aec35b...	86400.0 s	1.4 KiB
/prod/1.19.14-y0ptsc/prebid-analytics.980e6134af0dbb700d9...	604800.0 s	5.5 KiB
/-weQLu1Im8es/AAAAAAAAAAI/AAAAAAAABEg/4bXLPukGRgA/s32-rj/...	86400.0 s	1.3 KiB
askubuntu.com/Content/Shared/Channels/channels.css?v=d431b1be5a03	604800.0 s	4.7 KiB
askubuntu.com/Content/Sites/askubuntu/Img/logo.svg?v=472cf2768bba	604800.0 s	4.4 KiB
/components/taboola-auto-tagId-component.d35311409295ad80...	86400.0 s	1.1 KiB
askubuntu.com/px.js?ch=1	14400.0 s	520 B
askubuntu.com/px.js?ch=2	14400.0 s	391 B
askubuntu.com/Content/Js/google-analytics.en.js?v=48615a9a9bc4	604800.0 s	2.4 KiB
askubuntu.com/Content/Js/islands/one-tap.en.js?v=102f0378a2cf	604800.0 s	1.7 KiB
askubuntu.com/Content/Js/sprinkles/left-nav-events.en.js?v=2ac13fd60bf6	604800.0 s	1.2 KiB
/Content/Sites/askubuntu/img/site-background-image.png?v=...	604800.0 s	1.1 KiB
askubuntu.com/Content/Js/sprinkles/cookie-consent.en.js?v=7ee6963139c5	604800.0 s	911 B
askubuntu.com/Content/Sites/askubuntu/Img/icon-48.png?v=fd3b426e9803	604800.0 s	882 B

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
askubuntu.com/px.js?ch=2	391 B
askubuntu.com/px.js?ch=1	520 B	165 ms
ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js	30.4 KiB	1.2 s
cdn.cookielaw.org/scripttemplates/otSDKStub.js	8.8 KiB	166 ms
cdn.cookielaw.org/scripttemplates/gpp.stub.js	2.1 KiB	810 ms
askubuntu.com/Content/Sites/askubuntu/primary.css?v=3dc445ae4447	69.6 KiB	331 ms
askubuntu.com/Content/Shared/stacks.css?v=b2264ccf0463	110.2 KiB	1.5 s
askubuntu.com/Content/Js/stub.en.js?v=e307fb81e738	18.0 KiB
askubuntu.com/Content/Js/google-analytics.en.js?v=48615a9a9bc4	2.4 KiB
askubuntu.com/Content/Shared/Channels/channels.css?v=d431b1be5a03	4.7 KiB

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
div#hot-network-questions > ul > li > div.favicon `div#hot-network-questions > ul > li > div.favicon`	askubuntu.com/Content/Img/favicons-sprite32.png?v=91e30776b0a0	274.8 KiB	200.7 KiB

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

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

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: 1.3 s 169.6 KiB

URL	Transfer Size	Est Savings
askubuntu.com/Content/Shared/stacks.css?v=b2264ccf0463	110.1 KiB	104.5 KiB
askubuntu.com/Content/Sites/askubuntu/primary.css?v=3dc445ae4447	69.5 KiB	65.1 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: 3.0 s 601.1 KiB

URL	Transfer Size	Est Savings
/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31...	187.4 KiB	129.0 KiB
/prebid/9.30.0.js?fork=1&v=bf6611fc0393cee6578a23c9bb5689...	130.6 KiB	96.1 KiB
cdn.cookielaw.org/scripttemplates/202602.1.0/otBannerSdk.js	128.8 KiB	73.1 KiB
accounts.google.com/gsi/client	95.6 KiB	71.7 KiB
raven-static.aditude.io/prod/1.19.14-y0ptsc/raven.js	106.9 KiB	64.0 KiB
www.googletagmanager.com/gtag/js?id=G-S812YQPLT2	154.3 KiB	60.2 KiB
/stackoverflow-M6HzSe6yue/mapping.base/prebid-wrapper.js	83.6 KiB	33.8 KiB
askubuntu.com/Content/Js/webpack-chunks/svelte.en.js?v=f773033c4e0b	32.0 KiB	31.8 KiB
/Content/Js/third-party/npm/@stackoverflow/stacks/dist/js...	30.4 KiB	21.0 KiB
ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js	29.8 KiB	20.4 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
Unattributable	551 ms	29 ms	0.0 ms
askubuntu.com/	449 ms	49 ms	13 ms
cdn.cookielaw.org/scripttemplates/202602.1.0/otGPP.js	446 ms	410 ms	16 ms
/stackoverflow-M6HzSe6yue/mapping.base/prebid-wrapper.js	351 ms	198 ms	28 ms
www.googletagmanager.com/gtag/js?id=G-S812YQPLT2	236 ms	203 ms	32 ms
askubuntu.com/cdn-cgi/challenge-platform/scripts/jsd/main.js	211 ms	184 ms	9.7 ms
/prebid/9.30.0.js?fork=1&v=bf6611fc0393cee6578a23c9bb5689...	190 ms	153 ms	36 ms
/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31...	172 ms	114 ms	50 ms
raven-static.aditude.io/prod/1.19.14-y0ptsc/raven.js	160 ms	121 ms	39 ms
cdn.cookielaw.org/scripttemplates/202602.1.0/otBannerSdk.js	154 ms	68 ms	45 ms
askubuntu.com/Content/Js/islands/signup-modal.en.js?v=f64ec881ea96	133 ms	116 ms	2.3 ms
/components/throttle-refresh-component.de8e70e8b17a42bbf0...	108 ms	106 ms	0.4 ms
securepubads.g.doubleclick.net/tag/js/gpt.js	85 ms	72 ms	12 ms
askubuntu.com/Content/Js/islands/one-tap.en.js?v=102f0378a2cf	68 ms	40 ms	0.4 ms
/Content/Js/third-party/npm/@stackoverflow/stacks/dist/js...	63 ms	53 ms	9.2 ms
ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js	61 ms	50 ms	8.0 ms
cdn.cookielaw.org/scripttemplates/otSDKStub.js	60 ms	51 ms	2.6 ms

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
Script Evaluation	2.2 s
Other	550 ms
Style & Layout	451 ms
Script Parsing & Compilation	381 ms
Parse HTML & CSS	94 ms
Garbage Collection	85 ms
Rendering	32 ms

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
Ask Ubuntu `header.site-header > div.site-header--container > a.site-header--link > img.h-auto`	askubuntu.com/Content/Sites/askubuntu/Img/logo.svg?v=472cf2768bba

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

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,868 KiB

●User Timing marks and measures 5 user timings

●Avoid long main-thread tasks 15 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 100 ms

●Server Backend Latencies 280 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 160 ms

○INP breakdown

○LCP request discovery

○Avoid non-composited animations

○Avoid large layout shifts

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Ask Question `div#mainbar > div.d-flex > div.ml12 > a.ws-nowrap`
more tags `div#mainbar > div.d-flex > div.flex--item > a.more-tags`
32k `div#question-summary-1514281 > div.s-post-summary--stats > div.s-post-summary--stats-item > span.s-post-summary--stats-item-number`
views `div#question-summary-1514281 > div.s-post-summary--stats > div.s-post-summary--stats-item > span.s-post-summary--stats-item-unit`
mchid `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
13k `div#question-summary-1341389 > div.s-post-summary--stats > div.s-post-summary--stats-item > span.s-post-summary--stats-item-number`
views `div#question-summary-1341389 > div.s-post-summary--stats > div.s-post-summary--stats-item > span.s-post-summary--stats-item-unit`
Community `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
Kratz `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
guiverc `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
2k `div#question-summary-20178 > div.s-post-summary--stats > div.s-post-summary--stats-item > span.s-post-summary--stats-item-number`
views `div#question-summary-20178 > div.s-post-summary--stats > div.s-post-summary--stats-item > span.s-post-summary--stats-item-unit`
pee-j `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
DJCrashdummy `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
4k `div#question-summary-1526455 > div.s-post-summary--stats > div.s-post-summary--stats-item > span.s-post-summary--stats-item-number`
views `div#question-summary-1526455 > div.s-post-summary--stats > div.s-post-summary--stats-item > span.s-post-summary--stats-item-unit`
woodz `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
kyodake `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
David DE `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
David DE `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
David DE `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
kyodake `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
user222789 `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
15k `div#question-summary-824251 > div.s-post-summary--stats > div.s-post-summary--stats-item > span.s-post-summary--stats-item-number`
views `div#question-summary-824251 > div.s-post-summary--stats > div.s-post-summary--stats-item > span.s-post-summary--stats-item-unit`
Community `div.s-user-card--info > div.s-user-card--link > a.flex--item > span`
Browse more Questions `div#content > div.inner-content > div#mainbar > a.s-btn`
more hot questions `div.inner-content > div#sidebar > div#hot-network-questions > a.show-more`
Recent questions feed `div.inner-content > div#sidebar > div#feed-link > a`

These are opportunities to improve the legibility of your content.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Ubuntu 24.04 APT - Specify Architecture Using .sources Files `div > div#question-summary-1514281 > div.s-post-summary--content > h3.s-post-summary--content-title`

These are opportunities to improve keyboard navigation in your application.

Names and labels

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
body.home-page > header.s-topbar > div.s-topbar--container > a.s-topbar--menu-btn `body.home-page > header.s-topbar > div.s-topbar--container > a.s-topbar--menu-btn`
body.home-page > header.s-topbar > div.s-topbar--container > a.s-topbar--logo `body.home-page > header.s-topbar > div.s-topbar--container > a.s-topbar--logo`

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
Technology `div > ul.-list > li > a.-link`
Business `div > ul.-list > li > a.-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]` 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

●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

●`[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

●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

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Uses ARIA roles only on compatible elements

●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

○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.

○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>`.

○All heading elements contain content.

○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

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
site logo `div.s-modal--dialog > h1#signup-modal-title > div.s-modal--header > img.h48`	askubuntu.com/Content/Sites/askubuntu/Img/icon-48.png?v=fd3b426e9803	48 x 48	48 x 48	72 x 72

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 / Warning	Source
SharedStorage	askubuntu.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	askubuntu.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	askubuntu.com/cdn-cgi/challenge-platform/scripts/jsd/main.js

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.

Source	Description
accounts.google.com/gsi/client line 85, col 88	`[GSI_LOGGER]: FedCM get() rejects with NetworkError: Error retrieving a token.`
askubuntu.com/Content/Js/explore-qlist.en.js?v=ee2a4f8c3992	`Failed to load resource: the server responded with a status of 403 ()`
askubuntu.com/Content/Js/full-anon.en.js?v=037e97b07fca	`Failed to load resource: the server responded with a status of 403 ()`
askubuntu.com/	`Not signed in with the identity provider.`
askubuntu.com/	`Refused to execute script from 'https://askubuntu.com/Content/Js/explore-qlist.en.js?v=ee2a4f8c3992' because its MIME type ('text/html') is not executable, and strict MIME type checking is enabled.`
askubuntu.com/	`Refused to execute script from 'https://askubuntu.com/Content/Js/full-anon.en.js?v=037e97b07fca' because its MIME type ('text/html') is not executable, and strict MIME type checking is enabled.`

●Uses HTTPS

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Page has the HTML doctype

●Properly defines charset

●No 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

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 destination	Link Text
/internal/?utm_medium=referral&utm_source=askubuntu-commu...	Learn more
/internal/?utm_medium=referral&utm_source=askubuntu-commu...	Learn more

Format your HTML in a way that enables crawlers to better understand your app’s content.

○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 are crawlable

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid