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fbdown.net Mobile Performance
77/100
These metrics represent real-world Chrome users experience viewing fbdown.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.
User Loading Experience
Cumulative Layout Shift
First Input Delay
First Contentful Paint
Largest Contentful Paint
Metrics
Largest Contentful Paint36/100 4.6 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Speed Index80/100 4.0 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint80/100 2.8 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Time to Interactive93/100 3.4 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Total Blocking Time100/100 110 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 (8)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Eliminate render-blocking resources
Potential savings of 970 ms
969 ms
Remove unused CSS
Potential savings of 17 KiB
300 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Ensure text remains visible during webfont load
Uses efficient cache policy on static assets
25 resources found
Largest Contentful Paint element
1 element found
Avoid long main-thread tasks
6 long tasks found
Keep request counts low and transfer sizes small
37 requests • 249 KiB
Avoid chaining critical requests
10 chains found
Passed Audits (20)
JavaScript execution time
0.5 s
Minimizes main-thread work
1.3 s
Minify JavaScript
Preconnect to required origins
Preload key requests
Efficiently encode images
Avoids enormous network payloads
Total size was 249 KiB
Uses passive listeners to improve scrolling performance
Avoid multiple page redirects
Potential savings of 630 ms
Remove unused JavaScript
Potential savings of 36 KiB
Minimize third-party usage
Third-party code blocked the main thread for 50 ms
Defer offscreen images
Enable text compression
Serve images in next-gen formats
Minify CSS
Use video formats for animated content
Avoids an excessive DOM size
394 elements
Properly size images
Potential savings of 3 KiB
Initial server response time was short
Root document took 410 ms
Avoids `document.write()`
fbdown.net Mobile SEO
86/100
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.
Links do not have descriptive text
2 links found
Image elements do not have `[alt]` attributes
Passed Audits (12)
Document uses legible font sizes
99.52% legible text
Document avoids plugins
Document has a valid `rel=canonical`
Page has successful HTTP status code
Document has a `<title>` element
Tap targets are sized appropriately
100% appropriately sized tap targets
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
robots.txt is valid
Document has a valid `hreflang`
Document has a meta description
Links are crawlable
Page isn’t blocked from indexing
fbdown.net Mobile Best Practices
69/100
These checks highlight opportunities to improve the overall code health of fbdown.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 (4)
User Experience
Displays images with incorrect aspect ratio
Trust and Safety
Does not use HTTPS
1 insecure request found
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
4 vulnerabilities detected
Passed Audits (10)
No browser errors logged to the console
Avoids deprecated APIs
Serves images with appropriate resolution
Properly defines charset
Avoids Application Cache
Avoids requesting the geolocation permission on page load
Allows users to paste into password fields
Avoids requesting the notification permission on page load
Detected JavaScript libraries
Page has the HTML doctype
fbdown.net Mobile Progressive Web App
50/100
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)
PWA Optimized
Is not configured for a custom splash screen
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Fast and reliable
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Installable
Web app manifest does not meet the installability requirements
Does not use HTTPS
1 insecure request found
Does not register a service worker that controls page and `start_url`
Passed Audits (6)
Content is sized correctly for the viewport
Provides a valid `apple-touch-icon`
Contains some content when JavaScript is not available
Page load is fast enough on mobile networks
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Redirects HTTP traffic to HTTPS
fbdown.net Mobile Accessibility
86/100
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.
Form elements do not have associated labels
Image elements do not have `[alt]` attributes
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (20)
`[aria-*]` attributes are valid and not misspelled
The page contains a heading, skip link, or landmark region
`[aria-hidden="true"]` is not present on the document `<body>`
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`[aria-hidden="true"]` elements do not contain focusable descendents
`[aria-*]` attributes match their roles
`[role]`s have all required `[aria-*]` attributes
`[aria-*]` attributes have valid values
Buttons have an accessible name
Links have a discernible name
Document has a `<title>` element
`<frame>` or `<iframe>` elements have a title
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
Heading elements appear in a sequentially-descending order
`<html>` element has a valid value for its `[lang]` attribute
`<html>` element has a `[lang]` attribute
`[role]` values are valid
ARIA IDs are unique
No element has a `[tabindex]` value greater than 0
Mobile Usability
98/100
These checks validate how easily a visitor can use fbdown.net 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 (5)
Avoid app install interstitials that hide content
Avoid plugins
Configure the viewport
Size content to viewport
Use legible font sizes
Mobile Speed
59/100
These checks analyze the performance of fbdown.net 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 (5)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Prioritize visible content
Enable compression
Optimize images
Passed Audits (5)
Avoid landing page redirects
Reduce server response time
Minify CSS
Minify HTML
Minify JavaScript
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