Lighthouse Mobile
· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.Detailed Report
Audit breakdown by category with detailed findings.
Performance
Insights
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
Performance issues directly impact user engagement and conversion rates.
Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling
Performance issues directly impact user engagement and conversion rates.
3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.
Performance issues directly impact user engagement and conversion rates.
A long cache lifetime can speed up repeat visits to your page. Learn more about caching.
Performance issues directly impact user engagement and conversion rates.
| Request | Cache TTL | Transfer Size |
|---|---|---|
| /images/default-source/default-album/cmr-gpo-gov-banner-p... | 15.0 s | 707.6 KiB |
| www.gpo.gov/images/default-source/other-images/ben | 15.0 s | 37.6 KiB |
| www.gpo.gov/images/default-source/government-information-resources-row2/blog | 15.0 s | 36.4 KiB |
| /images/default-source/government-information-resources-r... | 15.0 s | 30.4 KiB |
| www.gpo.gov/images/default-source/government-information-resources-row2/fdlp | 15.0 s | 29.8 KiB |
| www.gpo.gov/images/default-source/other-images/catalog1 | 15.0 s | 12.7 KiB |
| www.gpo.gov/images/default-source/default-album/banner-mobile.svg | 15.0 s | 10.2 KiB |
| www.gpo.gov/images/default-source/default-album/banner-new.svg | 15.0 s | 10.1 KiB |
| www.gpo.gov/images/default-source/other-images/2govinfo | 15.0 s | 9.9 KiB |
| /v/t39.30808-1/243325529_246482710846149_1550102713410130... | 1209600.0 s | 9.7 KiB |
Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.
Performance issues directly impact user engagement and conversion rates.
Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.
Performance issues directly impact user engagement and conversion rates.
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
… div#myCarousel > div.carousel-inner > div.item > div.container | /images/default-source/default-album/cmr-gpo-gov-banner-p... | 703.5 KiB | 625.0 KiB |
Ben’s Guide to the <br>U.S. Government div#cphImageGalleryRow1_C065_imagesFrontendThumbnailsListBasic > div.col-md-4 > figure.effect-sadie > img | www.gpo.gov/images/default-source/other-images/ben | 34.3 KiB | 24.5 KiB |
Government <br>Book Talk div#cphImageGalleryRow2_C066_imagesFrontendThumbnailsListBasic > div.col-md-4 > figure.effect-sadie > img | www.gpo.gov/images/default-source/government-information-resources-row2/blog | 33.1 KiB | 23.3 KiB |
U.S. Government Bookstore div#cphImageGalleryRow2_C066_imagesFrontendThumbnailsListBasic > div.col-md-4 > figure.effect-sadie > img | /images/default-source/government-information-resources-r... | 27.1 KiB | 17.3 KiB |
Locate a Federal Depository Library div#cphImageGalleryRow2_C066_imagesFrontendThumbnailsListBasic > div.col-md-4 > figure.effect-sadie > img | www.gpo.gov/images/default-source/government-information-resources-row2/fdlp | 26.6 KiB | 16.8 KiB |
Home Page Banner div.container > div.navbar-header > a.navbar-brand > img | www.gpo.gov/CustomResources/img/logo_text.jpg | 6.1 KiB | 5.6 KiB |
Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.
Performance issues directly impact user engagement and conversion rates.
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
Performance issues directly impact user engagement and conversion rates.
Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.
Performance issues directly impact user engagement and conversion rates.
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| gpo.gov/ | 1.1 s |
| www.gpo.gov/ | 0.0 ms |
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.
Performance issues directly impact user engagement and conversion rates.
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.
Performance issues directly impact user engagement and conversion rates.
Diagnostics
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.gpo.gov/CustomResources/css/bootstrap.css | 45.9 KiB | 12.3 KiB |
| www.gpo.gov/CustomResources/css/bootsnav.css | 10.6 KiB | 3.5 KiB |
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.gpo.gov/CustomResources/css/bootstrap.css | 42.7 KiB | 39.0 KiB |
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| /Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl11_T... | 1.4 MiB | 1.1 MiB |
| www.googletagmanager.com/gtag/js?id=G-VPP8P85209&cx=c>m=4e64h1 | 159.4 KiB | 109.2 KiB |
| www.googletagmanager.com/gtm.js?id=GTM-WKZ584V5 | 111.4 KiB | 69.1 KiB |
| www.googletagmanager.com/gtag/js?id=G-VPP8P85209 | 159.4 KiB | 63.8 KiB |
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.
Performance issues directly impact user engagement and conversion rates.
| URL | Total CPU Time | Script Evaluation | Script Parse |
|---|---|---|---|
| /Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl11_T... | 1.2 s | 744 ms | 343 ms |
| www.gpo.gov/ | 321 ms | 14 ms | 8.5 ms |
| Unattributable | 318 ms | 7.8 ms | 0.0 ms |
| www.googletagmanager.com/gtag/js?id=G-VPP8P85209 | 278 ms | 234 ms | 41 ms |
| /ScriptResource.axd?d=wIuRaUoAZ6lXIF1Yn5fO2NRpZNsHic67h2m... | 200 ms | 131 ms | 7.5 ms |
| www.googletagmanager.com/gtm.js?id=GTM-WKZ584V5 | 133 ms | 86 ms | 32 ms |
| /Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl11_T... | 86 ms | 68 ms | 8.0 ms |
| www.googletagmanager.com/gtag/js?id=G-VPP8P85209&cx=c>m=4e64h1 | 68 ms | 24 ms | 44 ms |
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work
Performance issues directly impact user engagement and conversion rates.
| Category | Time Spent |
|---|---|
| Script Evaluation | 1.3 s |
| Script Parsing & Compilation | 500 ms |
| Other | 415 ms |
| Style & Layout | 266 ms |
| Parse HTML & CSS | 74 ms |
| Rendering | 52 ms |
| Garbage Collection | 35 ms |
Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache
Performance issues directly impact user engagement and conversion rates.
| Failure reason | Failure type |
|---|---|
| The page has an unload handler in the main frame. | Actionable |
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
Performance issues directly impact user engagement and conversion rates.
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
| URL | |
|---|---|
govinfo<br>(beta release) div#cphImageGalleryRow1_C065_imagesFrontendThumbnailsListBasic > div.col-md-4 > figure.effect-sadie > img | www.gpo.gov/images/default-source/other-images/2govinfo |
Ben’s Guide to the <br>U.S. Government div#cphImageGalleryRow1_C065_imagesFrontendThumbnailsListBasic > div.col-md-4 > figure.effect-sadie > img | www.gpo.gov/images/default-source/other-images/ben |
Catalog of <br>U.S. Government Publications div#cphImageGalleryRow1_C065_imagesFrontendThumbnailsListBasic > div.col-md-4 > figure.effect-sadie > img | www.gpo.gov/images/default-source/other-images/catalog1 |
Government <br>Book Talk div#cphImageGalleryRow2_C066_imagesFrontendThumbnailsListBasic > div.col-md-4 > figure.effect-sadie > img | www.gpo.gov/images/default-source/government-information-resources-row2/blog |
U.S. Government Bookstore div#cphImageGalleryRow2_C066_imagesFrontendThumbnailsListBasic > div.col-md-4 > figure.effect-sadie > img | /images/default-source/government-information-resources-r... |
Locate a Federal Depository Library div#cphImageGalleryRow2_C066_imagesFrontendThumbnailsListBasic > div.col-md-4 > figure.effect-sadie > img | www.gpo.gov/images/default-source/government-information-resources-row2/fdlp |
div#cphHeader_T97BC6AE4028_Col00 > div.sfContentBlock > div.container > img.image-top-small div#cphHeader_T97BC6AE4028_Col00 > div.sfContentBlock > div.container > img.image-top-small | www.gpo.gov/images/default-source/default-album/banner-mobile.svg |
Home Page Banner div.container > div.navbar-header > a.navbar-brand > img | www.gpo.gov/CustomResources/img/logo_text.jpg |
More information about the performance of your application. These numbers don't directly affect the Performance score.
Accessibility
These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.
ARIA
Some ARIA parent roles must contain specific child roles to perform their intended accessibility functions. Learn more about roles and required children elements.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Congressionally Mandated Reports
Read More form#form > div#wrapper > div#myCarousel > div.carousel-inner |
When an input field doesn't have an accessible name, screen readers announce it with a generic name, making it unusable for users who rely on screen readers. Learn more about input field labels.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Congressionally Mandated Reports
Read More form#form > div#wrapper > div#myCarousel > div.carousel-inner |
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Contrast
Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Read More div.container > div.carousel-caption > p > a#ctl00_cphHeader_T97BC6AE4003_carouselList_ctrl0_slidesRepeater_ctl00_slideButton |
GPO Director Presents FY2027 Appropriations Request to Congress a > div.row > div.col-md-12 > h2.featurette-heading |
The U.S. Government Publishing Office (GPO) Director Hugh Nathanial Halpern pre… div.row > div.col-md-12 > p.lead > span.sfnewsSummary |
A Game Changer on the Press Floor a > div.row > div.col-md-12 > h2.featurette-heading |
When the new press on GPO’s production floor roars to life, it doesn’t just pri… div.row > div.col-md-12 > p.lead > span.sfnewsSummary |
Fifty Years at Laurel a > div.row > div.col-md-12 > h2.featurette-heading |
For 50 years, GPO’s Distribution Center in Laurel, Maryland, has quietly played… div.row > div.col-md-12 > p.lead > span.sfnewsSummary |
GPO Director Names Managing Director of Government Integrated Print Services a > div.row > div.col-md-12 > h2.featurette-heading |
U.S. Government Publishing Office (GPO) Director Hugh Nathanial Halpern named R… div.row > div.col-md-12 > p.lead > span.sfnewsSummary |
GPO Director Appoints Leaders To Depository Library Council a > div.row > div.col-md-12 > h2.featurette-heading |
U.S. Government Publishing Office (GPO) Director Hugh Nathanial Halpern, on the… div.row > div.col-md-12 > p.lead > span.sfnewsSummary |
GPO and the Library of Congress Digitize 10,000 Volumes of the United States Se… a > div.row > div.col-md-12 > h2.featurette-heading |
U.S. Government Publishing Office (GPO) achieved a major milestone by uploading… div.row > div.col-md-12 > p.lead > span.sfnewsSummary |
View More News div.col-md-7 > div > p > a.btn |
Testing Accessible Web Applications and Forms li.sfeventListItem > div.post-preview > a > p.lead |
Dates: April 22 – 23
Location: Online
Cost: $775 li.sfeventListItem > div.post-preview > a > p.text-muted |
Dates: div.post-preview > a > p.text-muted > strong |
Location: div.post-preview > a > p.text-muted > strong |
Cost: div.post-preview > a > p.text-muted > strong |
Testing Accessible Web Pages li.sfeventListItem > div.post-preview > a > p.lead |
Dates: April 23
Location: Online
Cost: $575 li.sfeventListItem > div.post-preview > a > p.text-muted |
Dates: div.post-preview > a > p.text-muted > strong |
Location: div.post-preview > a > p.text-muted > strong |
Cost: div.post-preview > a > p.text-muted > strong |
View All Events div.col-md-4 > div.sfContentBlock > p > a.btn |
THE OFFICIAL WEBSITE OF THE U.S. GOVERNMENT PUBLISHING OFFICE div#wrapper > div.sfContentBlock > footer > p |
Accessibility | Privacy | COOP | Inspector General div#wrapper > div.sfContentBlock > footer > p |
Accessibility div.sfContentBlock > footer > p > a |
Privacy div.sfContentBlock > footer > p > a |
COOP div.sfContentBlock > footer > p > a |
Inspector General div.sfContentBlock > footer > p > a |
These are opportunities to improve the legibility of your content.
Best Practices
User Experience
Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.
Performance issues directly impact user engagement and conversion rates.
| URL | Displayed size | Actual size | Expected size | |
|---|---|---|---|---|
Home Page Banner div.container > div.navbar-header > a.navbar-brand > img | www.gpo.gov/CustomResources/img/logo_text.jpg | 76 x 39 | 74 x 38 | 114 x 59 |
General
Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.
Performance issues directly impact user engagement and conversion rates.
| Deprecation / Warning | Source |
|---|---|
| Unload event listeners are deprecated and will be removed. | /Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl11_T... line 5, col 57515 |
Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit
Performance issues directly impact user engagement and conversion rates.
| Source | Description |
|---|---|
www.googletagmanager.com/gtag/js?id=G-VPP8P85209 line 238, col 390 | Connecting to 'https://region1.google-analytics.com/g/collect?v=2&tid=G-VPP8P85209>m=45je64h1v9207110606za200zb9207322184zd9207322184&_p=1776805255245&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=AEAAAAQ&ae=a&are=1&cid=225796773.1776805255&frm=0&pscdl=noapi&rcb=13&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=2&tag_exp=0~115938465~115938468~117266401&sid=1776805255&sct=1&seg=0&dl=https%3A%2F%2Fwww.gpo.gov%2F&dt=U.S.%20Government%20Publishing%20Office&en=scroll&epn.percent_scrolled=90&_et=9&tfd=6309' violates the following Content Security Policy directive: "connect-src 'self' d3lopmpcew67el.cloudfront.net accounts.google.com https://*.insight.sitefinity.com https://*.dec.sitefinity.com *.mktoresp.com https://display.popt.in/APIRequest/68463719072e4 https://display.popt.in/APIRequest/viewed/ee6c12968a725 https://display.popt.in/APIRequest/conversion/ https://analytics.google.com https://www.googletagmanager.com https://www.google-analytics.com https://stats.g.doubleclick.net". The action has been blocked. |
www.googletagmanager.com/gtag/js?id=G-VPP8P85209 line 238, col 390 | Connecting to 'https://region1.google-analytics.com/g/collect?v=2&tid=G-VPP8P85209>m=45je64h1v9207110606za200zb9207322184zd9207322184&_p=1776805255245&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=225796773.1776805255&frm=0&pscdl=noapi&rcb=13&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938468~117266401&sid=1776805255&sct=1&seg=0&dl=https%3A%2F%2Fwww.gpo.gov%2F&dt=U.S.%20Government%20Publishing%20Office&en=page_view&_fv=2&_nsi=1&_ss=1&_c=1&_ee=1&tfd=1297' violates the following Content Security Policy directive: "connect-src 'self' d3lopmpcew67el.cloudfront.net accounts.google.com https://*.insight.sitefinity.com https://*.dec.sitefinity.com *.mktoresp.com https://display.popt.in/APIRequest/68463719072e4 https://display.popt.in/APIRequest/viewed/ee6c12968a725 https://display.popt.in/APIRequest/conversion/ https://analytics.google.com https://www.googletagmanager.com https://www.google-analytics.com https://stats.g.doubleclick.net". The action has been blocked. |
www.googletagmanager.com/gtag/js?id=G-VPP8P85209 line 238, col 390 | Fetch API cannot load https://region1.google-analytics.com/g/collect?v=2&tid=G-VPP8P85209>m=45je64h1v9207110606za200zb9207322184zd9207322184&_p=1776805255245&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=AEAAAAQ&ae=a&are=1&cid=225796773.1776805255&frm=0&pscdl=noapi&rcb=13&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=2&tag_exp=0~115938465~115938468~117266401&sid=1776805255&sct=1&seg=0&dl=https%3A%2F%2Fwww.gpo.gov%2F&dt=U.S.%20Government%20Publishing%20Office&en=scroll&epn.percent_scrolled=90&_et=9&tfd=6309. Refused to connect because it violates the document's Content Security Policy. |
www.googletagmanager.com/gtag/js?id=G-VPP8P85209 line 238, col 390 | Fetch API cannot load https://region1.google-analytics.com/g/collect?v=2&tid=G-VPP8P85209>m=45je64h1v9207110606za200zb9207322184zd9207322184&_p=1776805255245&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=225796773.1776805255&frm=0&pscdl=noapi&rcb=13&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938468~117266401&sid=1776805255&sct=1&seg=0&dl=https%3A%2F%2Fwww.gpo.gov%2F&dt=U.S.%20Government%20Publishing%20Office&en=page_view&_fv=2&_nsi=1&_ss=1&_c=1&_ee=1&tfd=1297. Refused to connect because it violates the document's Content Security Policy. |
Refused to apply style from 'https://www.gpo.gov/' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled. |
Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.
Performance issues directly impact user engagement and conversion rates.
| Issue type |
|---|
| Content security policy |
Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.
Performance issues directly impact user engagement and conversion rates.
SEO
These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.
Content Best Practices
Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.
Performance issues directly impact user engagement and conversion rates.
Descriptive link text helps search engines understand your content. Learn how to make links more accessible.
Performance issues directly impact user engagement and conversion rates.
Format your HTML in a way that enables crawlers to better understand your app’s content.
Crawling and Indexing
Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable
Performance issues directly impact user engagement and conversion rates.
| Uncrawlable Link |
|---|
… li.dropdown > div.input-group > div.input-group-btn > a.btn |
gpo.gov li.dropdown > ul.dropdown-menu > li > a#searchbtn |
govinfo li.dropdown > ul.dropdown-menu > li > a#govinfosearchbtn |
To appear in search results, crawlers need access to your app.