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The Department of Homeland Security has a vital mission: to secure the nation from the many threats we face. This requires the dedication of more than...
dhs.gov Mobile Performance
19/100
These metrics represent real-world Chrome users experience viewing dhs.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 Paint1/100 9.2 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Time to Interactive2/100 20.0 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Speed Index6/100 11.0 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint21/100 5.6 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Total Blocking Time37/100 730 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 (21)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Eliminate render-blocking resources
Potential savings of 3,750 ms
3,750 ms
Defer offscreen images
Potential savings of 933 KiB
3,600 ms
Serve images in next-gen formats
Potential savings of 813 KiB
2,850 ms
Avoid multiple page redirects
Potential savings of 1,110 ms
1,110 ms
Remove unused JavaScript
Potential savings of 107 KiB
1,050 ms
Remove unused CSS
Potential savings of 59 KiB
450 ms
Minify JavaScript
Potential savings of 21 KiB
150 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
Ensure text remains visible during webfont load
Avoid `document.write()`
Does not use passive listeners to improve scrolling performance
Serve static assets with an efficient cache policy
90 resources found
Minimize main-thread work
5.9 s
Reduce JavaScript execution time
3.1 s
Avoid enormous network payloads
Total size was 3,148 KiB
Avoid an excessive DOM size
883 elements
Avoid chaining critical requests
17 chains found
Largest Contentful Paint element
1 element found
Avoid large layout shifts
1 element found
Keep request counts low and transfer sizes small
155 requests • 3,148 KiB
Avoid long main-thread tasks
17 long tasks found
Passed Audits (8)
Minify CSS
Properly size images
Preconnect to required origins
Preload key requests
Efficiently encode images
Use video formats for animated content
Enable text compression
Initial server response time was short
Root document took 240 ms
dhs.gov Mobile SEO
96/100
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
54% appropriately sized tap targets
Passed Audits (13)
Links have descriptive text
Document uses legible font sizes
98.99% legible text
Document avoids plugins
Page isn’t blocked from indexing
Document has a meta description
Document has a `<title>` element
Links are crawlable
Document has a valid `rel=canonical`
robots.txt is valid
Document has a valid `hreflang`
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Image elements have `[alt]` attributes
Page has successful HTTP status code
dhs.gov Mobile Best Practices
62/100
These checks highlight opportunities to improve the overall code health of dhs.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 (5)
General
Browser errors were logged to the console
Trust and Safety
Includes front-end JavaScript libraries with known security vulnerabilities
5 vulnerabilities detected
Links to cross-origin destinations are unsafe
Does not use HTTPS
1 insecure request found
User Experience
Serves images with low resolution
Passed Audits (9)
Detected JavaScript libraries
Avoids deprecated APIs
Avoids requesting the geolocation permission on page load
Page has the HTML doctype
Displays images with correct aspect ratio
Avoids requesting the notification permission on page load
Properly defines charset
Allows users to paste into password fields
Avoids Application Cache
dhs.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)
Fast and reliable
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive at 20.0 s
PWA Optimized
Does not set a theme color for the address bar.
Does not provide a valid `apple-touch-icon`
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
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
Passed Audits (4)
Redirects HTTP traffic to HTTPS
Contains some content when JavaScript is not available
Content is sized correctly for the viewport
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
dhs.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 (24)
Links have a discernible name
`[aria-hidden="true"]` is not present on the document `<body>`
`<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.
`[aria-hidden="true"]` elements do not contain focusable descendents
`<html>` element has a `[lang]` attribute
ARIA IDs are unique
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Document has a `<title>` element
`[role]`s have all required `[aria-*]` attributes
`[role]` values are valid
`[aria-*]` attributes have valid values
Background and foreground colors have a sufficient contrast ratio
`<frame>` or `<iframe>` elements have a title
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`[aria-*]` attributes are valid and not misspelled
The page contains a heading, skip link, or landmark region
Heading elements appear in a sequentially-descending order
`[aria-*]` attributes match their roles
`[lang]` attributes have a valid value
Image elements have `[alt]` attributes
`[id]` attributes on active, focusable elements are unique
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[role]`s are contained by their required parent element
Mobile Usability
98/100
These checks validate how easily a visitor can use dhs.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
38/100
These checks analyze the performance of dhs.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
Optimize images
Avoid landing page redirects
Enable compression
Minify JavaScript
Passed Audits (4)
Reduce server response time
Minify CSS
Minify HTML
Prioritize visible content
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