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.

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]

items: [map[duration:355.385 label:Time to first byte subpart:timeToFirstByte] map[duration:2502.603 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-H1

nodeLabel: Welcome to the social internet.

path: 1,HTML,1,BODY,0,DIV,1,DIV,0,MAIN,0,SECTION,2,DIV,0,DIV,0,H1

selector: section.800:min-h-[800px] > div.relative > div.max-w-[800px] > h1.text-shadow-hero

snippet: <h1 class="text-shadow-hero shadow-black-shadow text-sans-42 800:text-sans-76 font-50…" style="opacity: 1; transform: none;">

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

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
Image of a post by user @theferocity.bsky.social. `div.bg-offwhite > div.absolute > picture > img`	bsky.social/about/hero-reply-card.webp	52.7 KiB	46.8 KiB
Image of a post by user @mnateshyamalan.bsky.social. `div.bg-offwhite > div.absolute > picture > img`	bsky.social/about/hero-social-card.webp	38.3 KiB	34.8 KiB

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

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.0 s

URL	Time Spent
bsky.social/	1.0 s
bsky.social/about	0.0 ms

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.

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: 770 ms 178.5 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-WTBZ3K80ET&cx=c&gtm=4e64k1	156.9 KiB	66.1 KiB
www.googletagmanager.com/gtm.js?id=GTM-KZT6XPW7	118.0 KiB	64.6 KiB
bsky.social/about/_next/static/chunks/framework-fa877b8be7542607.js	58.1 KiB	27.6 KiB
bsky.social/about/_next/static/chunks/pages/_app-e6ca888df01112c8.js	42.0 KiB	20.2 KiB

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Other	938 ms
Script Evaluation	938 ms
Style & Layout	300 ms
Script Parsing & Compilation	186 ms
Rendering	123 ms
Parse HTML & CSS	29 ms
Garbage Collection	17 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
CNBC `div > div > div.flex > img.w-auto`	bsky.social/about/cnbc-1.svg
CNBC `div > div > div.flex > img.w-auto`	bsky.social/about/cnbc-1.svg
TechCrunch `div > div > div.flex > img.w-auto`	bsky.social/about/techcrunch-logo-1.svg
TechCrunch `div > div > div.flex > img.w-auto`	bsky.social/about/techcrunch-logo-1.svg
Engadget `div > div > div.flex > img.w-auto`	bsky.social/about/engadget.svg
Engadget `div > div > div.flex > img.w-auto`	bsky.social/about/engadget.svg
The Verge `div > div > div.flex > img.w-auto`	bsky.social/about/the-verge.svg
The Verge `div > div > div.flex > img.w-auto`	bsky.social/about/the-verge.svg
The Wall Street Journal `div > div > div.flex > img.w-auto`	bsky.social/about/the-wall-street-journal-1.svg
The Wall Street Journal `div > div > div.flex > img.w-auto`	bsky.social/about/the-wall-street-journal-1.svg
Image of a post by user @theferocity.bsky.social. `div.bg-offwhite > div.absolute > picture > img`	bsky.social/about/hero-reply-card.webp
The Washington Post `div > div > div.flex > img.w-auto`	bsky.social/about/the-washington-post.svg
The Washington Post `div > div > div.flex > img.w-auto`	bsky.social/about/the-washington-post.svg
Image of a post by user @mnateshyamalan.bsky.social. `div.bg-offwhite > div.absolute > picture > img`	bsky.social/about/hero-social-card.webp
Tech Dirt `div > div > div.flex > img.w-auto`	bsky.social/about/techdirt-logo.svg
Tech Dirt `div > div > div.flex > img.w-auto`	bsky.social/about/techdirt-logo.svg
Associated Press `div > div > div.flex > img.w-auto`	bsky.social/about/associate-press.svg
Associated Press `div > div > div.flex > img.w-auto`	bsky.social/about/associate-press.svg
NY Times `div > div > div.flex > img.w-auto`	bsky.social/about/the-new-york-times.svg
NY Times `div > div > div.flex > img.w-auto`	bsky.social/about/the-new-york-times.svg
Mashable `div > div > div.flex > img.w-auto`	bsky.social/about/mash-logo.svg
Mashable `div > div > div.flex > img.w-auto`	bsky.social/about/mash-logo.svg

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

●Use efficient cache lifetimes

●Layout shift culprits

●Optimize DOM size

●Font display

●Forced reflow

●Modern HTTP

●Render blocking requests

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Avoids enormous network payloads Total size was 861 KiB

●User Timing marks and measures 9 user timings

●JavaScript execution time 1.1 s

●Avoid long main-thread tasks 8 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 70 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 130 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
How is Bluesky different? `div.flex > div.h-full > div.mt-4 > h5.text-sans-20`
Take a deeper dive `div.flex > div.h-full > div.mt-4 > h5.text-sans-20`
Martin Kleppmann `div.h-full > div.mt-4 > p.mt-4 > a.text-primary-blue`
See project `div.grid > a.rounded-[20px] > div.flex > p.font-600`
See project `div.grid > a.rounded-[20px] > div.flex > p.font-600`
See project `div.grid > a.rounded-[20px] > div.flex > p.font-600`
See project `div.grid > a.rounded-[20px] > div.flex > p.font-600`
See project `div.grid > a.rounded-[20px] > div.flex > p.font-600`
See project `div.grid > a.rounded-[20px] > div.flex > p.font-600`

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
Your timeline, your choice `div.flex > div.w-full > div.max-w-[440px] > h4.font-700`
How is Bluesky different? `div.flex > div.h-full > div.mt-4 > h5.text-sans-20`

These are opportunities to improve keyboard navigation in your application.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Company Blog AT Protocol App `div#__next > div.grid > nav.800:hidden > ul.w-full`

Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Company `nav.800:hidden > ul.w-full > div.py-8 > li.block`
Blog `nav.800:hidden > ul.w-full > div.py-8 > li.block`
AT Protocol `nav.800:hidden > ul.w-full > div.py-8 > li.block`
App `nav.800:hidden > ul.w-full > div.py-8 > li.block`

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●ARIA attributes are used as specified for the element's role

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Elements use only permitted ARIA attributes

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links are distinguishable without relying on color.

●Links have a discernible name

●Touch targets have sufficient size and spacing.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●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 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

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○No element has a `[tabindex]` value greater than 0

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

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

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○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.

100

Best Practices

●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 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 clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

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
bsky.social/about/faq	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

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`