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
f-droid.org/assets/fdroid-screenshot-en.png	43200.0 s	56.9 KiB
/assets/opencollective_button_iIGF0Hixdj0EaYR3Sd7FRigTVcl...	43200.0 s	11.9 KiB
f-droid.org/css/main.css	43200.0 s	7.4 KiB
/assets/liberapay_donate_button_GHdOOfmFJNeSXjfjnA-98XtIu...	43200.0 s	2.2 KiB
f-droid.org/assets/ic_search_black_24px.svg	43200.0 s	1.6 KiB

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:0.191799] map[node:map[boundingRect:map[bottom:2165 height:842 left:16 right:396 top:1323 width:380] lhId:page-2-DIV nodeLabel:العربية བོད་སྐད་ català Čeština Deutsch English Español euskara فارسی Français עב… path:1,HTML,1,BODY,2,DIV,1,DIV,1,DIV selector:body > div.site-wrapper > div.main-content > div.sidebar snippet:<div class="sidebar"> type:node] score:0.191799 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:1316 height:694 left:16 right:396 top:622 width:380] lhId:page-0-IMG nodeLabel:F-Droid Android app screenshot path:1,HTML,1,BODY,2,DIV,1,DIV,0,DIV,2,DIV,1,DIV,0,IMG selector:div.article-area > div.download-and-screenshot > div.screenshot > img snippet:<img src="/assets/phone-frame_kEDoOnDDPLnsqH4lVaEun9wfQgM9ivrhk5OiUWWdKHc=.png" alt="F-Droid Android app screenshot" style=""> type:node]]] type:subitems]]]

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
F-Droid Android app screenshot `div.article-area > div.download-and-screenshot > div.screenshot > img`	f-droid.org/assets/fdroid-screenshot-en.png	56.7 KiB	26.3 KiB
Donate to our Collective `ul.donate-options > li.donate-option > a > img`	/assets/opencollective_button_iIGF0Hixdj0EaYR3Sd7FRigTVcl...	11.7 KiB	8.9 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-0-IMG

nodeLabel: F-Droid Android app screenshot

path: 1,HTML,1,BODY,2,DIV,1,DIV,0,DIV,2,DIV,1,DIV,0,IMG

selector: div.article-area > div.download-and-screenshot > div.screenshot > img

snippet: <img src="/assets/phone-frame_kEDoOnDDPLnsqH4lVaEun9wfQgM9ivrhk5OiUWWdKHc=.png" alt="F-Droid Android app screenshot" style="">

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

value: No additional origins are good candidates for preconnecting

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

Diagnostics

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
F-Droid Android app screenshot `div.article-area > div.download-and-screenshot > div.screenshot > img`	f-droid.org/assets/phone-frame_kEDoOnDDPLnsqH4lVaEun9wfQgM9ivrhk5OiUWWdKHc=.png
Donate to our Collective `ul.donate-options > li.donate-option > a > img`	/assets/opencollective_button_iIGF0Hixdj0EaYR3Sd7FRigTVcl...
F-Droid `div.site-wrapper > header.site-header > a.site-title > img`	/assets/fdroid-logo-text_S0MUfk_FsnAYL7n2MQye-34IoSNm6QM6...
Donate via Liberapay `ul.donate-options > li.donate-option > a > img`	/assets/liberapay_donate_button_GHdOOfmFJNeSXjfjnA-98XtIu...

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

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.

Element	Layout shift score
العربية བོད་སྐད་ català Čeština Deutsch English Español euskara فارسی Français עב… `body > div.site-wrapper > div.main-content > div.sidebar`	0.192

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Render blocking requests

●Optimize viewport for mobile

●Time to Interactive 1.6 s

●Max Potential First Input Delay 20 ms

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Reduce unused JavaScript

●Avoids enormous network payloads Total size was 164 KiB

●JavaScript execution time 0.0 s

●Minimizes main-thread work 0.3 s

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 60 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

○User Timing marks and measures

○Avoid long main-thread tasks

○Avoid non-composited animations

Accessibility

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

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
body > div.banner > button.banner--close `body > div.banner > button.banner--close`

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div > form.search-form > div.search-input-wrp > input.search-input `div > form.search-form > div.search-input-wrp > input.search-input`

Form elements without effective labels can create frustrating experiences for screen reader users. Learn more about the `select` element.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
العربية བོད་སྐད་ català Čeština Deutsch English Español euskara فارسی Français עב… `div.sidebar > div.sidebar-widget > form > select#language-chooser-select`

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.

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
https://keepandroidopen.org/ `body > div.banner > div.banner--text > a`
Edit on GitLab `div.site-description > p > span.edit-this-page-area > a`

These are opportunities to improve the legibility of your content.

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
Instructions to verify the download `div.download-and-screenshot > div.download > div.pgp-verification > a`

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `html`

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

●Image elements have `[alt]` attributes

●Input buttons have discernible text.

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

●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

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●Heading elements appear in a sequentially-descending order

○`[accesskey]` values are unique

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

○`button`, `link`, and `menuitem` elements have accessible names

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

○Deprecated ARIA roles were not used

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

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

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements use only permitted ARIA attributes

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

○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

○`[role]` values are valid

○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

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

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

○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 type="image">` elements have `[alt]` text

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

○`<object>` elements have alternate text

○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.

○Identical links have the same purpose.

○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.

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
F-Droid Android app screenshot `div.article-area > div.download-and-screenshot > div.screenshot > img`	f-droid.org/assets/phone-frame_kEDoOnDDPLnsqH4lVaEun9wfQgM9ivrhk5OiUWWdKHc=.png	380 x 694	413 x 754	570 x 1041

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.

Description
`Error with Permissions-Policy header: Parse of permissions policy failed because of errors reported by structured header parser.`

●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

●Page has the HTML doctype

●Properly defines charset

●No issues in the `Issues` panel in Chrome Devtools

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Ensure CSP is effective against XSS attacks

○Mitigate clickjacking with XFO or CSP

○Detected JavaScript libraries

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

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`