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Francebleu.fr Mobile Performance

francebleu.fr Mobile Performance

20/100

These metrics represent real-world Chrome users experience viewing francebleu.fr 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.

User Loading Experience

Largest Contentful Paint

Cumulative Layout Shift

First Input Delay

First Contentful Paint

Metrics

Total Blocking Time0/100 3,690 ms

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

Largest Contentful Paint0/100 14.5 s

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

Time to Interactive4/100 18.3 s

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

Speed Index26/100 7.6 s

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

First Contentful Paint73/100 3.1 s

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

Cumulative Layout Shift100/100 0.003

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

Should Fix (15)

Opportunities

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

Remove unused JavaScript

Potential savings of 719 KiB

4,580 ms

Remove unused CSS

Potential savings of 187 KiB

1,650 ms

Eliminate render-blocking resources

Potential savings of 1,100 ms

1,104 ms

Reduce initial server response time

Root document took 870 ms

269 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 430 ms

Minimize main-thread work

10.8 s

Avoid an excessive DOM size

2,936 elements

Reduce JavaScript execution time

6.7 s

Serve static assets with an efficient cache policy

10 resources found

Avoid chaining critical requests

9 chains found

User Timing marks and measures

3 user timings

Keep request counts low and transfer sizes small

57 requests • 1,993 KiB

Avoid large layout shifts

4 elements found

Largest Contentful Paint element

1 element found

Avoid long main-thread tasks

20 long tasks found

Passed Audits (15)

Serve images in next-gen formats

Use video formats for animated content

Uses passive listeners to improve scrolling performance

Minify JavaScript

Avoid multiple page redirects

Potential savings of 630 ms

Enable text compression

All text remains visible during webfont loads

Properly size images

Preconnect to required origins

Preload key requests

Minify CSS

Avoids `document.write()`

Efficiently encode images

Avoids enormous network payloads

Total size was 1,993 KiB

Defer offscreen images

Potential savings of 14 KiB

Francebleu.fr Mobile SEO

francebleu.fr Mobile SEO

91/100

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 (2)

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

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.

Tap targets are not sized appropriately

85% appropriately sized tap targets

Passed Audits (12)

robots.txt is valid

Document avoids plugins

Has a `<meta name="viewport">` tag with `width` or `initial-scale`

Page isn’t blocked from indexing

Document has a valid `rel=canonical`

Links are crawlable

Page has successful HTTP status code

Links have descriptive text

Document has a valid `hreflang`

Document has a meta description

Document uses legible font sizes

99.88% legible text

Document has a `<title>` element

Francebleu.fr Mobile Best Practices

francebleu.fr Mobile Best Practices

69/100

These checks highlight opportunities to improve the overall code health of francebleu.fr 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 (4)

Trust and Safety

Includes front-end JavaScript libraries with known security vulnerabilities

2 vulnerabilities detected

Links to cross-origin destinations are unsafe

Does not use HTTPS

1 insecure request found

General

Browser errors were logged to the console

Passed Audits (10)

Avoids requesting the notification permission on page load

Properly defines charset

Allows users to paste into password fields

Detected JavaScript libraries

Serves images with appropriate resolution

Displays images with correct aspect ratio

Page has the HTML doctype

Avoids requesting the geolocation permission on page load

Avoids Application Cache

Avoids deprecated APIs

Francebleu.fr Mobile Progressive Web App

francebleu.fr 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 (8)

Fast and reliable

Current page does not respond with a 200 when offline

Page load is not fast enough on mobile networks

Interactive at 18.3 s

`start_url` does not respond with a 200 when offline

PWA Optimized

Manifest doesn't have a maskable icon

Is not configured for a custom splash screen

Installable

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

Does not use HTTPS

1 insecure request found

Web app manifest does not meet the installability requirements

Passed Audits (6)

Has a `<meta name="viewport">` tag with `width` or `initial-scale`

Sets a theme color for the address bar.

Contains some content when JavaScript is not available

Provides a valid `apple-touch-icon`

Redirects HTTP traffic to HTTPS

Content is sized correctly for the viewport

Francebleu.fr Mobile Accessibility

francebleu.fr Mobile Accessibility

90/100

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 (3)

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

Contrast

These are opportunities to improve the legibility of your content.

Background and foreground colors do not have a sufficient contrast ratio.

Passed Audits (21)

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.

Buttons have an accessible name

Heading elements appear in a sequentially-descending order

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

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

ARIA IDs are unique

The page contains a heading, skip link, or landmark region

`[role]` values are valid

`[id]` attributes on active, focusable elements are unique

Form elements have associated labels

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

`[aria-*]` attributes match their roles

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

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

`[aria-*]` attributes have valid values

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

`[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

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

Francebleu.fr Mobile Usability

Mobile Usability

99/100

These checks validate how easily a visitor can use francebleu.fr on a mobile device. Test results include a list of any mobile usability problems. Mobile usability problems are issues that can affect a user that visits the page on a mobile (small screen) device, including small font sizes (which are hard to read on a small screen).

Should Fix (1)

Size tap targets appropriately

Passed Audits (4)

Avoid plugins

Configure the viewport

Size content to viewport

Use legible font sizes

Francebleu.fr Mobile PageSpeed

Mobile Speed

52/100

These checks analyze the performance of francebleu.fr on mobile devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?

Should Fix (6)

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Prioritize visible content

Optimize images

Enable compression

Leverage browser caching

Minify HTML

Passed Audits (4)

Avoid landing page redirects

Reduce server response time

Minify CSS

Minify JavaScript

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Francebleu.fr France Bleu – L'actualité en direct, info locale et nationale

L'actualité en direct, pour vous et près de chez vous avec France Bleu : info locale et nationale, sports, loisirs, musique. Écoutez, on est bien ense...

Francebleu.fr Mobile Performance

User Loading Experience

Largest Contentful Paint

Cumulative Layout Shift

First Input Delay

First Contentful Paint

Metrics

Total Blocking Time0/100 3,690 ms

Largest Contentful Paint0/100 14.5 s

Time to Interactive4/100 18.3 s

Speed Index26/100 7.6 s

First Contentful Paint73/100 3.1 s

Cumulative Layout Shift100/100 0.003

Should Fix (15)

Opportunities

Diagnostics

Passed Audits (15)

Francebleu.fr Mobile SEO

Should Fix (2)

Content Best Practices

Mobile Friendly

Passed Audits (12)

Francebleu.fr Mobile Best Practices

Should Fix (4)

Trust and Safety

General

Passed Audits (10)

Francebleu.fr Mobile Progressive Web App

Should Fix (8)

Fast and reliable

PWA Optimized

Installable

Passed Audits (6)

Francebleu.fr Mobile Accessibility

Should Fix (3)

Names and labels

Contrast

Passed Audits (21)

Francebleu.fr Mobile Usability

Should Fix (1)

Passed Audits (4)

Francebleu.fr Mobile PageSpeed

Should Fix (6)

Passed Audits (4)

Francebleu.fr Typos

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