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.
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 | |
|---|---|---|---|
Explore Roblox in our mobile app!
Roblox for Android
Continue in App
Continue i… main#container-main > div#content > div#download-the-app-container > div.download-app-background | images.rbxcdn.com/2b36f80da6dbdf80.png | 246.2 KiB | 206.0 KiB |
HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.
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.
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 |
|---|---|---|
| www.roblox.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/e694063b5082/main.js? | 14400.0 s | 9.4 KiB |
| /www/e.png?evt=pageHeartbeat&ctx=heartbeat1&url=https%3A%... | 0.0 ms | 656 B |
| www.roblox.com/js/utilities/bundleVerifier.js?v=91dceb4978eda412b09842312dd6cbaa | 604800.0 s | 2.9 KiB |
| roblox.com/js/hsts.js?v=3 | 604800.0 s | 960 B |
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
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
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 |
|---|---|---|
| /d2eaca6faaaa8d6fa2d157344f4ab73259728ecda54ed1cc6f2d7362... | 105.0 KiB | 103.5 KiB |
| /c322b91ca81a7865f4c49ac675d1ab14df2cdec6479bc4a7fe8af14d... | 22.1 KiB | 17.2 KiB |
| /8e1cfd7bd32c2e18abd4d13279ce270d1f0f6a2c6bf05d29dbab0729... | 13.9 KiB | 13.9 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.
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.
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 | 2.6 s |
| Script Parsing & Compilation | 897 ms |
| Other | 649 ms |
| Parse HTML & CSS | 160 ms |
| Garbage Collection | 121 ms |
| Style & Layout | 117 ms |
| Rendering | 26 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 |
| Pages with cache-control:no-store header cannot enter back/forward cache. | Actionable |
| Pages whose main resource has cache-control:no-store cannot enter back/forward cache. | Not actionable |
| Back/forward cache is disabled because WebSocket has been used. | Not actionable |
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| js.rbxcdn.com/0496306d944faeb488779bad1af0738e.js | 42.8 KiB | 6.7 KiB |
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.
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.
Best Practices
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. | |
| SharedStorage | |
| StorageType.persistent is deprecated. Please use standardized navigator.storage instead. | |
| Fledge |
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 |
|---|---|
[2026-08-22T17:11:16.734Z] Error: Failed to start the connection: Error: WebSocket failed to connect. The connection could not be found on the server, either the endpoint may not be a SignalR endpoint, the connection ID is not present on the server, or there is a proxy blocking WebSockets. If you have multiple servers check that sticky sessions are enabled. | |
Failed to load resource: the server responded with a status of 401 () | |
Loading the script 'https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-inline' 'wasm-unsafe-eval' apis.roblox.com roblox.com apis.robloxapp.vnggames.com arkoselabs.robloxapp.vnggames.com *.evidon.com *.gigya.com *.google-analytics.com *.ns1p.net adservice.google.com challenges.cloudflare.com cdn.arkoselabs.com connect.facebook.net funcaptcha.com js.rbxcdn.com js.stripe.com long.open.weixin.qq.com midas.gtimg.cn radar.cedexis.com res.wx.qq.com roblox-api.arkoselabs.com arkoselabs.roblox.com roblox-load-generator-configuration.s3.us-east-2.amazonaws.com s.ytimg.com sb.scorecardresearch.com static.rbxcdn.com www.google.com www.gstatic.com www.youtube.com h.online-metrix.net request.eprotect.vantivcnp.com request.eprotect.vantivpostlive.com *.googletagmanager.com *.googleadservices.com googleads.g.doubleclick.net cdn.veriff.me *.lightstep.com client-api.arkoselabs.com api.arkoselabs.com *.sierra.chat sierra.chat sc-static.net *.sc-static.net *.snapchat.com *.tapad.com analytics.tiktok.com cdn.safecharge.com *.px-cloud.net *.px-cdn.net". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked. | |
/3bc4063d90978e122a5d55fdd0651e12df6c48badefd50214e478c84... line 5, col 384681 | WebSocket connection to 'wss://realtime.roblox.com/' failed: Error during WebSocket handshake: Unexpected response code: 404 |
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 |
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.