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Historyviewer.net Mobile Performance

historyviewer.net Mobile Performance

95/100

These metrics represent real-world Chrome users experience viewing historyviewer.net on mobile devices. Reports are focused on loading performance and other critical factors that most affect user experience. Follow our guide to track, optimize, and improve the quality of your web pages.

Metrics

Total Blocking Time87/100 320 ms

Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.

Time to Interactive88/100 4.0 s

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

Speed Index99/100 2.1 s

Speed Index shows how quickly the contents of a page are visibly populated. Learn more.

Largest Contentful Paint99/100 1.7 s

Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More

First Contentful Paint100/100 1.0 s

First Contentful Paint marks the time at which the first text or image is painted. Learn more.

Cumulative Layout Shift100/100 0.002

Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.

Should Fix (12)

Opportunities

These suggestions can help your page load faster. They don't directly affect the Performance score.

Remove unused JavaScript

Potential savings of 90 KiB

780 ms

Serve images in next-gen formats

Potential savings of 19 KiB

150 ms

Enable text compression

Potential savings of 15 KiB

150 ms

Eliminate render-blocking resources

Potential savings of 100 ms

99 ms

Diagnostics

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

Reduce the impact of third-party code

Third-party code blocked the main thread for 390 ms

Serve static assets with an efficient cache policy

38 resources found

User Timing marks and measures

1 user timing

Avoid large layout shifts

5 elements found

Avoid chaining critical requests

2 chains found

Largest Contentful Paint element

1 element found

Keep request counts low and transfer sizes small

48 requests • 365 KiB

Avoid long main-thread tasks

5 long tasks found

Passed Audits (18)

Minimizes main-thread work

1.6 s

Minify JavaScript

All text remains visible during webfont loads

Avoids enormous network payloads

Total size was 365 KiB

JavaScript execution time

0.9 s

Properly size images

Avoids `document.write()`

Preconnect to required origins

Remove unused CSS

Initial server response time was short

Root document took 90 ms

Use video formats for animated content

Minify CSS

Efficiently encode images

Uses passive listeners to improve scrolling performance

Avoids an excessive DOM size

346 elements

Preload key requests

Defer offscreen images

Avoid multiple page redirects

Historyviewer.net Mobile SEO

historyviewer.net Mobile SEO

58/100

These checks ensure that your page is optimized for search engine results ranking. There are additional factors Lighthouse does not check that may affect your search ranking. Learn more. Run these additional validators on your site to check additional SEO best practices.

Should Fix (5)

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. Learn more.

Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`

Document doesn't use legible font sizes

Tap targets are not sized appropriately

Content Best Practices

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

Image elements do not have `[alt]` attributes

Passed Audits (7)

Document has a `<title>` element

Links have descriptive text

Page isn’t blocked from indexing

Document avoids plugins

Document has a meta description

Document has a valid `hreflang`

Page has successful HTTP status code

Historyviewer.net Mobile Best Practices

historyviewer.net Mobile Best Practices

62/100

These checks highlight opportunities to improve the overall code health of historyviewer.net mobile page. Current recommendations will help to make your page fast and secure, to create a good user experience and to avoid deprecated technologies.

Should Fix (5)

General

Browser errors were logged to the console

Trust and Safety

Links to cross-origin destinations are unsafe

Does not use HTTPS

39 insecure requests found

Browser Compatibility

Page lacks the HTML doctype, thus triggering quirks-mode

User Experience

Serves images with low resolution

Passed Audits (9)

Avoids Application Cache

Avoids front-end JavaScript libraries with known security vulnerabilities

Properly defines charset

Allows users to paste into password fields

Displays images with correct aspect ratio

Avoids requesting the notification permission on page load

Detected JavaScript libraries

Avoids requesting the geolocation permission on page load

Avoids deprecated APIs

Historyviewer.net Mobile Progressive Web App

historyviewer.net Mobile Progressive Web App

29/100

These checks validate the aspects of a Progressive Web App. Learn more. These checks are required by the baseline PWA Checklist but are not automatically checked by Lighthouse. They do not affect your score but it's important that you verify them manually.

Should Fix (12)

PWA Optimized

Does not redirect HTTP traffic to HTTPS

Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`

Manifest doesn't have a maskable icon

Does not set a theme color for the address bar.

Does not provide a valid `apple-touch-icon`

Content is not sized correctly for the viewport

Is not configured for a custom splash screen

Installable

Does not use HTTPS

39 insecure requests found

Web app manifest does not meet the installability requirements

Does not register a service worker that controls page and `start_url`

Fast and reliable

`start_url` does not respond with a 200 when offline

Current page does not respond with a 200 when offline

Passed Audits (2)

Page load is fast enough on mobile networks

Contains some content when JavaScript is not available

Historyviewer.net Mobile Accessibility

historyviewer.net Mobile Accessibility

85/100

These checks highlight opportunities to improve the accessibility of your web app. Only a subset of accessibility issues can be automatically detected so manual testing is also encouraged. These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.

Should Fix (4)

Navigation

These are opportunities to improve keyboard navigation in your application.

The page does not contain a heading, skip link, or landmark region

Names and labels

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.

Image elements do not have `[alt]` attributes

Links do not have a discernible name

Internationalization and localization

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

`<html>` element does not have a `[lang]` attribute

Passed Audits (16)

ARIA IDs are unique

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

`[aria-*]` attributes match their roles

`[aria-*]` attributes have valid values

Background and foreground colors have a sufficient contrast ratio

`[role]` values are valid

Document has a `<title>` element

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

Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.

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

Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

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

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

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

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

`[role]`s are contained by their required parent element

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