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uscis.gov Mobile Performance
10/100
These metrics represent real-world Chrome users experience viewing uscis.gov 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 Input Delay
Largest Contentful Paint
Cumulative Layout Shift
First Contentful Paint
Metrics
Largest Contentful Paint0/100 30.5 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Total Blocking Time1/100 2,520 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Time to Interactive1/100 27.0 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Speed Index12/100 9.5 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint18/100 5.8 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift97/100 0.064
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (16)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Serve images in next-gen formats
Potential savings of 4,846 KiB
24,450 ms
Properly size images
Potential savings of 1,169 KiB
5,850 ms
Remove unused JavaScript
Potential savings of 392 KiB
1,800 ms
Avoid multiple page redirects
Potential savings of 1,110 ms
1,110 ms
Defer offscreen images
Potential savings of 151 KiB
600 ms
Remove unused CSS
Potential savings of 14 KiB
150 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Serve static assets with an efficient cache policy
45 resources found
Ensure text remains visible during webfont load
Avoid enormous network payloads
Total size was 9,275 KiB
Minimize main-thread work
5.8 s
Reduce JavaScript execution time
3.4 s
Avoid chaining critical requests
6 chains found
Keep request counts low and transfer sizes small
57 requests • 9,275 KiB
Avoid large layout shifts
5 elements found
Avoid long main-thread tasks
13 long tasks found
Largest Contentful Paint element
1 element found
Passed Audits (13)
Avoids `document.write()`
Use video formats for animated content
Preload key requests
Preconnect to required origins
Eliminate render-blocking resources
Potential savings of 0 ms
Minimize third-party usage
Third-party code blocked the main thread for 200 ms
Enable text compression
Uses passive listeners to improve scrolling performance
Avoids an excessive DOM size
622 elements
Efficiently encode images
Initial server response time was short
Root document took 120 ms
Minify JavaScript
Minify CSS
uscis.gov Mobile SEO
83/100
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 (3)
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
68% appropriately sized tap targets
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
4 links found
Document does not have a meta description
Passed Audits (11)
Document uses legible font sizes
96.41% legible text
Document has a valid `rel=canonical`
Image elements have `[alt]` attributes
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
robots.txt is valid
Document avoids plugins
Page isn’t blocked from indexing
Page has successful HTTP status code
Document has a `<title>` element
Links are crawlable
Document has a valid `hreflang`
uscis.gov Mobile Best Practices
85/100
These checks highlight opportunities to improve the overall code health of uscis.gov 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)
Trust and Safety
Does not use HTTPS
1 insecure request found
Includes front-end JavaScript libraries with known security vulnerabilities
2 vulnerabilities detected
Passed Audits (12)
Properly defines charset
Page has the HTML doctype
Allows users to paste into password fields
Serves images with appropriate resolution
Detected JavaScript libraries
Links to cross-origin destinations are safe
Avoids deprecated APIs
No browser errors logged to the console
Avoids requesting the notification permission on page load
Displays images with correct aspect ratio
Avoids Application Cache
Avoids requesting the geolocation permission on page load
uscis.gov Mobile Progressive Web App
21/100
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 (10)
PWA Optimized
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Does not provide a valid `apple-touch-icon`
Installable
Web app manifest does not meet the installability requirements
Does not register a service worker that controls page and `start_url`
Does not use HTTPS
1 insecure request found
Fast and reliable
Page load is not fast enough on mobile networks
Interactive at 27.0 s
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Passed Audits (4)
Content is sized correctly for the viewport
Redirects HTTP traffic to HTTPS
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Contains some content when JavaScript is not available
uscis.gov Mobile Accessibility
100/100
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.
Passed Audits (26)
`[role]`s have all required `[aria-*]` attributes
`<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.
Heading elements appear in a sequentially-descending order
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Image elements have `[alt]` attributes
`[role]`s are contained by their required parent element
ARIA IDs are unique
`[id]` attributes on active, focusable elements are unique
No element has a `[tabindex]` value greater than 0
Buttons have an accessible name
`[aria-hidden="true"]` is not present on the document `<body>`
`[aria-*]` attributes have valid values
`[aria-hidden="true"]` elements do not contain focusable descendents
`<html>` element has a `[lang]` attribute
Links have a discernible name
Form elements have associated labels
`[aria-*]` attributes match their roles
`[role]` values are valid
Document has a `<title>` element
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[aria-*]` attributes are valid and not misspelled
The page contains a heading, skip link, or landmark region
Background and foreground colors have a sufficient contrast ratio
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`[lang]` attributes have a valid value
Mobile Usability
99/100
These checks validate how easily a visitor can use uscis.gov 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
49/100
These checks analyze the performance of uscis.gov 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)
Leverage browser caching
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Avoid landing page redirects
Optimize images
Enable compression
Minify JavaScript
Passed Audits (4)
Reduce server response time
Minify CSS
Minify HTML
Prioritize visible content
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