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
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
sb.scorecardresearch.com/internal-c2/15742520/cs.js	86400.0 s	1.2 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.header-wrapper > header#header > div.header-image-wrapper > a.header-image `div.header-wrapper > header#header > div.header-image-wrapper > a.header-image`	/eb2427185c9c227e0b319a2fbb72cf85/efyipna/8eEnci1bf/tumbl...	206.9 KiB	140.2 KiB
Bye, bye C3 – see you next year #35c3 `div.photo-wrapper > div.photo-wrapper-inner > a > img.u-photo`	/54c2afe5ff5dd021e69781026256f47b/tumblr_pkk7q4KxlM1qz4kv...	108.0 KiB	41.3 KiB
Rasenfunk Hauptstadtstudios. `div.photo-wrapper > div.photo-wrapper-inner > a > img.u-photo`	/80c914e93b87138aed62c5524b5ef6de/tumblr_ploey37mSW1qz4kv...	96.0 KiB	29.4 KiB
Lötroulette. Dem laufenden PC so lange Teile ausbauen bis er nicht mehr läuft. … `div.photo-wrapper > div.photo-wrapper-inner > a > img.u-photo`	/1b97a114e73794fc0ad7f11381be5e10/tumblr_pkio66WleG1qz4kv...	86.2 KiB	19.5 KiB
helmi `header#header > div.blog-title-wrapper > figure.avatar-wrapper > a.user-avatar`	64.media.tumblr.com/avatar_b6d64a2559f4_128.pnj	9.2 KiB	6.5 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: Rasenfunk Hauptstadtstudios.

path: 1,HTML,1,BODY,5,SECTION,2,SECTION,0,DIV,0,DIV,0,ARTICLE,0,DIV,1,SECTION,0,FIGURE,0,DIV,0,DIV,0,A,0,IMG

selector: div.photo-wrapper > div.photo-wrapper-inner > a > img.u-photo

snippet: <img class="u-photo" src="https://64.media.tumblr.com/80c914e93b87138aed62c5524b5ef6de/tumblr_ploey3…" alt="Rasenfunk Hauptstadtstudios." width="640" height="640">

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
/assets/scripts/pre_tumblelog.js?_v=b9f848c06fcba7eaf305d...	1.5 KiB
/assets/scripts/tumblelog_post_message_queue.js?_v=a8fadf...	541 B
assets.tumblr.com/default-theme/r1/main-min.css	13.3 KiB	151 ms
assets.tumblr.com/fonts/gibson/stylesheet.css?v=3	866 B
/client/prod/standalone/blog-network-npf/index.build.css?...	2.5 KiB	754 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.

URL	Est Savings
assets.tumblr.com/fonts/gibson/Gibson-SemiBold-webfont.woff?3	10 ms
/fonts/tumblr-icons/tumblr-icons_8a421f9ad671642549106ef5...	5.0 ms

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: 300 ms 26.8 KiB

URL	Transfer Size	Est Savings
.iframe-controls-container.iframe-controls-container--logged-in .message-button::before,.iframe-con…	17.8 KiB	16.5 KiB
assets.tumblr.com/default-theme/r1/main-min.css	12.9 KiB	10.3 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: 2.4 s 304.0 KiB

URL	Transfer Size	Est Savings
/pagead/managed/js/gpt/m202607090101/pubads_impl.js?cb=31...	192.9 KiB	146.5 KiB
/client/prod/standalone/tumblelog/index.build.js?_v=1ba6c...	190.1 KiB	78.8 KiB
/client/prod/standalone/tumblelog/index.build.js?_v=1ba6c...	190.1 KiB	78.7 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
/client/prod/standalone/tumblelog/index.build.js?_v=1ba6c...	2.1 s	1.2 s	315 ms
helmi.fm/	1.1 s	46 ms	17 ms
Unattributable	695 ms	18 ms	0.0 ms
/pagead/managed/js/gpt/m202607090101/pubads_impl.js?cb=31...	307 ms	190 ms	91 ms
assets.tumblr.com/default-theme/r1/main-min.js	301 ms	166 ms	54 ms
securepubads.g.doubleclick.net/tag/js/gpt.js	174 ms	157 ms	16 ms
www.google-analytics.com/analytics.js	145 ms	122 ms	8.8 ms
s0.wp.com/wp-content/js/bilmur.min.js?m=202629	62 ms	52 ms	2.2 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	2.0 s
Other	1.5 s
Style & Layout	527 ms
Script Parsing & Compilation	506 ms
Parse HTML & CSS	368 ms
Rendering	136 ms

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 reason	Failure type
The page has an unload handler in a sub frame.	Actionable

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.

URL	Transfer Size
/eb2427185c9c227e0b319a2fbb72cf85/efyipna/8eEnci1bf/tumbl...	1.6 MiB
/eb2427185c9c227e0b319a2fbb72cf85/efyipna/8eEnci1bf/tumbl...	207.7 KiB
/pagead/managed/js/gpt/m202607090101/pubads_impl.js?cb=31...	192.9 KiB
/client/prod/standalone/tumblelog/index.build.js?_v=1ba6c...	190.5 KiB
/client/prod/standalone/tumblelog/index.build.js?_v=1ba6c...	190.5 KiB
/54c2afe5ff5dd021e69781026256f47b/tumblr_pkk7q4KxlM1qz4kv...	108.6 KiB
/80c914e93b87138aed62c5524b5ef6de/tumblr_ploey37mSW1qz4kv...	96.6 KiB
/38dfdf51c19fd011f3c9c5c000555506/tumblr_pkeqi3Ismy1qz4kv...	88.9 KiB
/4f1d3d37f475d5ae556f71c892d1e186/tumblr_plbrdz96YW1qz4kv...	87.4 KiB
/1b97a114e73794fc0ad7f11381be5e10/tumblr_pkio66WleG1qz4kv...	86.7 KiB

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

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoid long main-thread tasks 14 long tasks found

●Avoid non-composited animations 1 animated element found

●Image elements have explicit `width` and `height`

●Network Requests

●Network Round Trip Times 300 ms

●Server Backend Latencies 1,380 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 370 ms

○INP breakdown

○User Timing marks and measures

○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
Fundstücke aus dem täglichen Streifzug durch das Web `header#header > div.blog-title-wrapper > div.title-group > span.description`
Instagram `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Photo `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
1 note `section.inline-meta > div.date-note-wrapper > span > a.meta-item`
Instagram `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Photo `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Instagram `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Photo `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Instagram `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Photo `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Instagram `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Photo `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Instagram `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Photo `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Instagram `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Photo `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Instagram `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Photo `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Instagram `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Photo `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Instagram `div.post-wrapper > section.post > section.inline-meta > a.meta-item`
Photo `div.post-wrapper > section.post > section.inline-meta > a.meta-item`

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
body.index-page > iframe.tmblr-iframe `body.index-page > iframe.tmblr-iframe`
div.controls-wrapper > div.control > div#like_button_182186811792 > iframe#like_iframe_182186811792 `div.controls-wrapper > div.control > div#like_button_182186811792 > iframe#like_iframe_182186811792`
div.controls-wrapper > div.control > div#like_button_182158360967 > iframe#like_iframe_182158360967 `div.controls-wrapper > div.control > div#like_button_182158360967 > iframe#like_iframe_182158360967`
div.controls-wrapper > div.control > div#like_button_182004925452 > iframe#like_iframe_182004925452 `div.controls-wrapper > div.control > div#like_button_182004925452 > iframe#like_iframe_182004925452`
div.controls-wrapper > div.control > div#like_button_181557201397 > iframe#like_iframe_181557201397 `div.controls-wrapper > div.control > div#like_button_181557201397 > iframe#like_iframe_181557201397`
div.controls-wrapper > div.control > div#like_button_181554298642 > iframe#like_iframe_181554298642 `div.controls-wrapper > div.control > div#like_button_181554298642 > iframe#like_iframe_181554298642`
div.controls-wrapper > div.control > div#like_button_181528950452 > iframe#like_iframe_181528950452 `div.controls-wrapper > div.control > div#like_button_181528950452 > iframe#like_iframe_181528950452`
div.controls-wrapper > div.control > div#like_button_181463041512 > iframe#like_iframe_181463041512 `div.controls-wrapper > div.control > div#like_button_181463041512 > iframe#like_iframe_181463041512`
div.controls-wrapper > div.control > div#like_button_181463040597 > iframe#like_iframe_181463040597 `div.controls-wrapper > div.control > div#like_button_181463040597 > iframe#like_iframe_181463040597`
div.controls-wrapper > div.control > div#like_button_181452959737 > iframe#like_iframe_181452959737 `div.controls-wrapper > div.control > div#like_button_181452959737 > iframe#like_iframe_181452959737`
div.controls-wrapper > div.control > div#like_button_181397012622 > iframe#like_iframe_181397012622 `div.controls-wrapper > div.control > div#like_button_181397012622 > iframe#like_iframe_181397012622`
body.index-page > iframe#ga_target `body.index-page > iframe#ga_target`

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.header-wrapper > header#header > div.header-image-wrapper > a.header-image `div.header-wrapper > header#header > div.header-image-wrapper > a.header-image`
helmi `header#header > div.blog-title-wrapper > figure.avatar-wrapper > a.user-avatar`
div.controls-wrapper > div.control > nav.pop > a.share `div.controls-wrapper > div.control > nav.pop > a.share`
section.post-controls > div.controls-wrapper > div.control > a.reblog_button `section.post-controls > div.controls-wrapper > div.control > a.reblog_button`
div.controls-wrapper > div.control > nav.pop > a.share `div.controls-wrapper > div.control > nav.pop > a.share`
section.post-controls > div.controls-wrapper > div.control > a.reblog_button `section.post-controls > div.controls-wrapper > div.control > a.reblog_button`
div.controls-wrapper > div.control > nav.pop > a.share `div.controls-wrapper > div.control > nav.pop > a.share`
section.post-controls > div.controls-wrapper > div.control > a.reblog_button `section.post-controls > div.controls-wrapper > div.control > a.reblog_button`
div.controls-wrapper > div.control > nav.pop > a.share `div.controls-wrapper > div.control > nav.pop > a.share`
section.post-controls > div.controls-wrapper > div.control > a.reblog_button `section.post-controls > div.controls-wrapper > div.control > a.reblog_button`
div.controls-wrapper > div.control > nav.pop > a.share `div.controls-wrapper > div.control > nav.pop > a.share`
section.post-controls > div.controls-wrapper > div.control > a.reblog_button `section.post-controls > div.controls-wrapper > div.control > a.reblog_button`
div.controls-wrapper > div.control > nav.pop > a.share `div.controls-wrapper > div.control > nav.pop > a.share`
section.post-controls > div.controls-wrapper > div.control > a.reblog_button `section.post-controls > div.controls-wrapper > div.control > a.reblog_button`
div.controls-wrapper > div.control > nav.pop > a.share `div.controls-wrapper > div.control > nav.pop > a.share`
section.post-controls > div.controls-wrapper > div.control > a.reblog_button `section.post-controls > div.controls-wrapper > div.control > a.reblog_button`
div.controls-wrapper > div.control > nav.pop > a.share `div.controls-wrapper > div.control > nav.pop > a.share`
section.post-controls > div.controls-wrapper > div.control > a.reblog_button `section.post-controls > div.controls-wrapper > div.control > a.reblog_button`
div.controls-wrapper > div.control > nav.pop > a.share `div.controls-wrapper > div.control > nav.pop > a.share`
section.post-controls > div.controls-wrapper > div.control > a.reblog_button `section.post-controls > div.controls-wrapper > div.control > a.reblog_button`
div.controls-wrapper > div.control > nav.pop > a.share `div.controls-wrapper > div.control > nav.pop > a.share`
section.post-controls > div.controls-wrapper > div.control > a.reblog_button `section.post-controls > div.controls-wrapper > div.control > a.reblog_button`

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.

Internationalization and localization

If a page doesn't specify a `lang` attribute, a screen reader assumes that the page is in the default language that the user chose when setting up the screen reader. If the page isn't actually in the default language, then the screen reader might not announce the page's text correctly. Learn more about the `lang` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `html`

These are opportunities to improve the interpretation of your content by users in different locales.

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`

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

●Document has a `<title>` element

●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.

●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

○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 a valid value for its `[lang]` attribute

○`<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.

○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

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
Unload event listeners are deprecated and will be removed.	/client/prod/standalone/tumblelog/index.build.js?_v=1ba6c... line 41, col 4252

●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 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

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`