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amazon.es Mobile Performance
50/100
These metrics represent real-world Chrome users experience viewing amazon.es 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
First Contentful Paint
First Input Delay
Cumulative Layout Shift
Largest Contentful Paint
Metrics
Largest Contentful Paint0/100 16.2 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Speed Index24/100 7.8 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint57/100 3.7 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Time to Interactive59/100 6.5 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Total Blocking Time94/100 250 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Cumulative Layout Shift100/100 0
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (19)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Reduce initial server response time
Root document took 2,080 ms
1,480 ms
Avoid multiple page redirects
Potential savings of 1,110 ms
1,110 ms
Serve images in next-gen formats
Potential savings of 54 KiB
900 ms
Remove unused JavaScript
Potential savings of 48 KiB
860 ms
Properly size images
Potential savings of 101 KiB
600 ms
Efficiently encode images
Potential savings of 40 KiB
600 ms
Eliminate render-blocking resources
Potential savings of 150 ms
150 ms
Defer offscreen images
Potential savings of 11 KiB
120 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Does not use passive listeners to improve scrolling performance
Ensure text remains visible during webfont load
Reduce the impact of third-party code
Third-party code blocked the main thread for 840 ms
Avoid `document.write()`
Minimize main-thread work
6.8 s
Reduce JavaScript execution time
3.5 s
Avoids enormous network payloads
Total size was 2,654 KiB
Keep request counts low and transfer sizes small
133 requests • 2,654 KiB
Avoid chaining critical requests
5 chains found
Largest Contentful Paint element
1 element found
Avoid long main-thread tasks
17 long tasks found
Passed Audits (9)
Use video formats for animated content
Preload key requests
Uses efficient cache policy on static assets
18 resources found
Remove unused CSS
Potential savings of 30 KiB
Preconnect to required origins
Avoids an excessive DOM size
558 elements
Minify JavaScript
Minify CSS
Enable text compression
amazon.es Mobile SEO
99/100
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 (1)
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
95% appropriately sized tap targets
Passed Audits (13)
Page isn’t blocked from indexing
Document avoids plugins
Links have descriptive text
Document has a `<title>` element
Links are crawlable
Document has a meta description
Document uses legible font sizes
88.82% legible text
Document has a valid `hreflang`
robots.txt is valid
Document has a valid `rel=canonical`
Image elements have `[alt]` attributes
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Page has successful HTTP status code
amazon.es Mobile Best Practices
85/100
These checks highlight opportunities to improve the overall code health of amazon.es 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 (2)
General
Browser errors were logged to the console
Trust and Safety
Does not use HTTPS
1 insecure request found
Passed Audits (12)
Avoids Application Cache
Avoids requesting the geolocation permission on page load
Displays images with correct aspect ratio
Avoids front-end JavaScript libraries with known security vulnerabilities
Links to cross-origin destinations are safe
Page has the HTML doctype
Detected JavaScript libraries
Serves images with appropriate resolution
Avoids deprecated APIs
Allows users to paste into password fields
Properly defines charset
Avoids requesting the notification permission on page load
amazon.es Mobile Progressive Web App
46/100
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 (9)
PWA Optimized
Manifest doesn't have a maskable icon
Does not provide a valid `apple-touch-icon`
Is not configured for a custom splash screen
Does not set a theme color for the address bar.
Installable
Does not use HTTPS
1 insecure request 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 (5)
Redirects HTTP traffic to HTTPS
Content is sized correctly for the viewport
Page load is fast enough on mobile networks
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Contains some content when JavaScript is not available
amazon.es 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)
Navigation
These are opportunities to improve keyboard navigation in your application.
`[id]` attributes on active, focusable elements are not unique
Some elements have a `[tabindex]` value greater than 0
Best practices
These items highlight common accessibility best practices.
`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
Passed Audits (22)
`<html>` element has a `[lang]` attribute
Document has a `<title>` element
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[aria-*]` attributes are valid and not misspelled
`[aria-hidden="true"]` is not present on the document `<body>`
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`[aria-*]` attributes match their roles
`[role]`s are contained by their required parent element
The page contains a heading, skip link, or landmark region
Links have a discernible name
`[aria-hidden="true"]` elements do not contain focusable descendents
Form elements have associated labels
Image elements have `[alt]` attributes
Background and foreground colors have a sufficient contrast ratio
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Buttons have an accessible name
`<html>` element has a valid value for its `[lang]` attribute
`[aria-*]` attributes have valid values
Heading elements appear in a sequentially-descending order
`[role]` values are valid
`[role]`s have all required `[aria-*]` attributes
ARIA IDs are unique
Mobile Usability
99/100
These checks validate how easily a visitor can use amazon.es 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
Mobile Speed
55/100
These checks analyze the performance of amazon.es 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 (4)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Avoid landing page redirects
Leverage browser caching
Prioritize visible content
Passed Audits (6)
Enable compression
Reduce server response time
Minify CSS
Minify HTML
Minify JavaScript
Optimize images
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