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
ads.digitalcaramel.com/caramel.js?ts=1776896525507	0.0 ms	166.8 KiB
s.luxcdn.com/t/202172/360_light.js	300.0 s	126.7 KiB
mc.yandex.ru/metrika/tag.js	3600.0 s	85.4 KiB
ad.mail.ru/static/vk-adman.js?slot=1824555	600.0 s	70.5 KiB
x01.aidata.io/lib/aidata.fp.latest.js?pixel=0892394	0.0 ms	59.5 KiB
/roxot-wrapper/js/roxot-manager.js?pid=19e08d82-9ec3-4dda...	600.0 s	61.9 KiB
static.a.mts.ru/id/pixel.js	1800.0 s	60.1 KiB
privacy-cs.mail.ru/static/sync-loader.js	600.0 s	21.9 KiB
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
content.adriver.ru/AdRiverFPS.js	3600.0 s	16.2 KiB
static.kimberlite.io/js/thumbmark.umd.js	0.0 ms	12.6 KiB
static.kimberlite.io/js/botd.js	0.0 ms	8.0 KiB
abt.s3.yandex.net/expjs/latest/exp.js	0.0 ms	6.4 KiB
ad.mail.ru/static/render-runner.js	600.0 s	5.7 KiB
www.acint.net/aci.js	43200.0 s	8.9 KiB
acint.net/aci.js	43200.0 s	8.9 KiB
tube.buzzoola.com/js/lib/buzzoola_ufp.js	2226.0 s	4.8 KiB
tube.buzzoola.com//js/lib/buzzoola_ufp.js	2226.0 s	4.8 KiB
sb.scorecardresearch.com/beacon.js	86400.0 s	6.7 KiB
cdn-rtb.sape.ru/js/uids.js	86400.0 s	6.7 KiB
dic.academic.ru/images/sprites.png?150326	864000.0 s	15.4 KiB
academic.ru/js/academic.min.js?150324	1209600.0 s	12.7 KiB
/wrapper/js/rp-core-engine.js?v=s-dc1af2de-5f10-4ef6-a4db...	345600.0 s	3.7 KiB
tube.buzzoola.com/js/lib/buzzoola_ext.js	2226.0 s	773 B
academic.ru/css/academic_v2.css?20210501a	1209600.0 s	6.3 KiB
/favicon/lex-group-tekhnika-dlya-doma.clients.site?size=3...	43200.0 s	1.2 KiB
/awg/custom/119/i/i?call_source=awg&ts=1776896528440&i=17...	0.0 ms	513 B
cmr.bidderstack.com/yandex/cm?user_id=	0.0 ms	271 B
sync.gonet-ads.com/match/yandex?id=%5BbuyerUid%5D&chk=1	0.0 ms	229 B
/server_match?partner_id=N&r=https%3A%2F%2Fyandex.ru%2Fan...	0.0 ms	199 B
nr.bidderstack.com/yandex/cm?user_id={partner_user_id}	0.0 ms	181 B
dic.academic.ru/images/sprites_flags.png?150326	864000.0 s	1.6 KiB
sync.opendsp.ru/match/sp.img?chk=1	0.0 ms	157 B
mc.yandex.com/metrika/advert.gif?t=gdpr(14)ti(4)	3600.0 s	187 B
academic.ru/images/Logo.png	864000.0 s	1.5 KiB
academic.ru/images/Logo_h.png	864000.0 s	1.4 KiB
sync.digitalcaramel.com/match/sp?chk=1	0.0 ms	133 B
px.arcspire.io/yndx?id=9d4cd41a-f59d-4815-8a89-9d30806f5389	0.0 ms	124 B
ssp.adriver.ru/cgi-bin/sync.cgi?ssp_id=19	0.0 ms	101 B
ssp.adriver.ru/cgi-bin/sync.cgi?dsp_id=109	0.0 ms	100 B
/sync_cookie_image_decide_secondary?cid=70309897&scid=122...	0.0 ms	79 B
/sync_cookie_image_decide?cid=70309897&scid=b49a3d0c-221c...	0.0 ms	67 B
academic.ru/css/mobile-menu.css?20190810	1209600.0 s	624 B
static.a.mts.ru/id/pixel.js	1800.0 s	0 B
x01.aidata.io/lib/aidata.fp.latest.js?pixel=0892394	0.0 ms	0 B

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.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e `div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e`	/get-yabs_performance/15050859/hat65af4c5df305cc0c8b11f8b...	29.6 KiB	5.7 KiB
div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e `div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e`	/get-yabs_performance/1715965/hat14ec5728b52a49b19b269e67...	28.6 KiB	5.5 KiB
div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e `div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e`	/get-yabs_performance/14192306/hatd53b581c9bf25896a80fab4...	24.3 KiB	4.7 KiB
div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e `div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e`	/get-yabs_performance/10464719/hat4eab44cd6482ee927f25d04...	21.8 KiB	4.2 KiB
div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e `div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e`	/get-yabs_performance/8213184/hatf08860a1b8ed704071d2e6e1...	21.2 KiB	4.1 KiB

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:308.013 label:Time to first byte subpart:timeToFirstByte] map[duration:2256.512 label:Resource load delay subpart:resourceLoadDelay] map[duration:282.615 label:Resource load duration subpart:resourceLoadDuration] map[duration:37.325 label:Element render delay subpart:elementRenderDelay]]

lhId: page-3-IMG

nodeLabel: div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e

path: 1,HTML,1,BODY,34,DIV,0,DIV,0,DIV,2,DIV,0,DIV,0,DIV,a,#document-fragment,0,DIV,2,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,DIV,0,DIV,0,DIV,0,IMG

selector: div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e

snippet: <img data-name="adaptiveImage" src="https://avatars.mds.yandex.net/get-yabs_performance/10464719/hat4eab44cd64…" elementtiming="tgo-ssr-image" class="o24ecf12e">

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-3-IMG

nodeLabel: div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e

path: 1,HTML,1,BODY,34,DIV,0,DIV,0,DIV,2,DIV,0,DIV,0,DIV,a,#document-fragment,0,DIV,2,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,DIV,0,DIV,0,DIV,0,IMG

selector: div.t2ebeb1ce > div.kc223781a > div.d3bed6466 > img.o24ecf12e

snippet: <img data-name="adaptiveImage" src="https://avatars.mds.yandex.net/get-yabs_performance/10464719/hat4eab44cd64…" elementtiming="tgo-ssr-image" class="o24ecf12e">

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

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

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: 3.0 s 602.0 KiB

URL	Transfer Size	Est Savings
s.luxcdn.com/t/202172/360_light.js	126.5 KiB	104.5 KiB
yastatic.net/partner-code-bundles/1304651/00cc0164cd639ddf.js	129.7 KiB	85.3 KiB
ads.digitalcaramel.com/caramel.js?ts=1776896525507	166.2 KiB	80.1 KiB
www.googletagmanager.com/gtag/js?id=G-QXJR5FPYJ8&cx=c&_slc=1	150.8 KiB	62.1 KiB
mc.yandex.ru/metrika/tag.js	84.7 KiB	43.3 KiB
yandex.ru/ads/system/context.js	103.8 KiB	38.9 KiB
x01.aidata.io/lib/aidata.fp.latest.js?pixel=0892394	59.4 KiB	35.5 KiB
x01.aidata.io/lib/aidata.fp.latest.js?pixel=0892394	59.4 KiB	34.4 KiB
yastatic.net/partner-code-bundles/1304651/9c75e4fc5aa6da83.js	52.1 KiB	33.9 KiB
ad.mail.ru/static/vk-adman.js?slot=1824555	70.0 KiB	32.1 KiB
ad.mail.ru/static/vk-adman.js?slot=1824555	70.0 KiB	31.6 KiB
yastatic.net/partner-code-bundles/1304651/22d10f9d8e892aab.js	31.8 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 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	1.7 s	386 ms	0.0 ms
academic.ru/	1.3 s	163 ms	3.8 ms
static.a.mts.ru/id/pixel.js	1.0 s	729 ms	66 ms
static.kimberlite.io/js/thumbmark.umd.js	883 ms	851 ms	0.2 ms
s.luxcdn.com/t/202172/360_light.js	838 ms	719 ms	27 ms
yandex.ru/ads/system/header-bidding.js	651 ms	300 ms	9.8 ms
x01.aidata.io/lib/aidata.fp.latest.js?pixel=0892394	576 ms	433 ms	62 ms
yandex.ru/ads/system/context.js	565 ms	415 ms	27 ms
yandex.ru/ads/system/adsdk.js	547 ms	490 ms	11 ms
ads.digitalcaramel.com/caramel.js?ts=1776896525507	500 ms	417 ms	14 ms
ad.mail.ru/static/vk-adman.js?slot=1824555	344 ms	129 ms	86 ms
yastatic.net/partner-code-bundles/1304651/9c75e4fc5aa6da83.js	317 ms	213 ms	17 ms
mc.yandex.ru/metrika/tag.js	309 ms	262 ms	27 ms
yastatic.net/partner-code-bundles/1304651/22d10f9d8e892aab.js	237 ms	178 ms	13 ms
www.googletagmanager.com/gtag/js?id=G-QXJR5FPYJ8&cx=c&_slc=1	172 ms	132 ms	40 ms
yastatic.net/partner-code-bundles/1304651/00cc0164cd639ddf.js	156 ms	109 ms	44 ms
content.adriver.ru/AdRiverFPS.js	105 ms	88 ms	3.6 ms
privacy-cs.mail.ru/static/sync-loader.js	101 ms	73 ms	6.4 ms
www.google-analytics.com/analytics.js	79 ms	66 ms	4.5 ms
cdn-rtb.sape.ru/js/uids.js	54 ms	50 ms	1.6 ms
/wrapper/js/rp-core-engine.js?v=s-dc1af2de-5f10-4ef6-a4db...	54 ms	50 ms	1.8 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	6.5 s
Other	2.3 s
Style & Layout	873 ms
Script Parsing & Compilation	503 ms
Rendering	327 ms
Garbage Collection	322 ms
Parse HTML & CSS	64 ms

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 3.0 KiB

URL	Transfer Size	Est Savings
static.kimberlite.io/js/botd.js	7.7 KiB	3.0 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

●Font display

●Forced reflow

●Modern HTTP

●Render blocking requests

●Optimize viewport for mobile

●Minify CSS

●Reduce unused CSS

●Avoids enormous network payloads Total size was 2,118 KiB

●User Timing marks and measures 5 user timings

●Avoid long main-thread tasks 20 long tasks found

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

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 80 ms

●Server Backend Latencies 390 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 170 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○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

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 > iframe `body > iframe`
body > iframe `body > iframe`
body > iframe `body > iframe`

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#page > div#footer > div#liveinternet > a `div#page > div#footer > div#liveinternet > a`

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.

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
Правила русского правописания Справочник по правописанию и стилистике Словарь-с… `div#content > div#diclist > div.column > ul`

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

●Buttons have an accessible name

●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.

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

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

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

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

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

●Touch targets have sufficient size and spacing.

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

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

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

○`[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

○`<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.

○`<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

○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
academic.ru `div#header > div#logo > a > img.h`	academic.ru/images/Logo_h.png	144 x 44	144 x 44	216 x 66

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
Topics	ad.mail.ru/static/vk-adman.js?slot=1824555

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
r.utraff.com/yandex	`Failed to load resource: net::ERR_TIMED_OUT`
r.utraff.com/yandex	`Failed to load resource: net::ERR_TIMED_OUT`
/ads/meta/4624683?target-ref=https%3A%2F%2Facademic.ru%2F...	`Failed to load resource: the server responded with a status of 404 ()`
academic.ru/ line 919, col 0	`ReferenceError: googletag is not defined at https://academic.ru/:920:1`

●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

●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

○Use a strong HSTS policy

○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

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`