Performance
· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.83 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.12 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
256 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.211
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.01 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
4.65 s
Page Load Progression
801 ms
1.6 s
2.4 s
3.2 s 4.0 s
4.8 s 5.6 s
6.4 sFPage Weight BudgetAction4.2 MB transferred, 203 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2890ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.foxnews.com/ | 921ms | 49ms | 13ms | 3rd |
| Unattributable | 496ms | 28ms | 0ms | 3rd |
| https://prod.fennec.atp.fox/js/fennec.js | 480ms | 425ms | 54ms | 3rd |
| https://static.foxnews.com/static/orion/scripts/core/ag.core.js?v=2026416182 | 343ms | 194ms | 10ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 323ms | 281ms | 29ms | 3rd |
| https://static.foxnews.com/static/isa/core-app.js | 102ms | 74ms | 17ms | 3rd |
| https://static.foxnews.com/static/strike/ver/app.v239.js | 91ms | 46ms | 26ms | 3rd |
| https://static.foxnews.com/static/isa/app/lib/omtr_code.js | 74ms | 47ms | 2ms | 3rd |
| https://js.appboycdn.com/web-sdk/6.2/braze.min.js | 61ms | 49ms | 7ms | 3rd |
FJS BundlesAction81 scripts, 1.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 173 KB (48%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 173 KB (48%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 173 KB (48%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 173 KB (48%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 173 KB (48%) | ✓ | 3rd |
| https://static.foxnews.com/static/orion/scripts/core/ag.core.js | 92 KB | 64 KB (70%) | ✓ | 3rd |
| https://static.foxnews.com/static/strike/ver/app.v239.js | 123 KB | 49 KB (40%) | ✓ | 3rd |
| https://static.foxnews.com/static/orion/scripts/core/ag.core.js?v=2026416182 | 92 KB | 46 KB (50%) | ✓ | 3rd |
| https://js.appboycdn.com/web-sdk/6.2/braze.min.js | 63 KB | 33 KB (52%) | ✓ | 3rd |
| https://my.foxnews.com/v2/scripts/libs.js?v=v3.11.0 | 40 KB | 25 KB (64%) | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction203 resources · 4.2 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 203 resources | 4.2 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization76 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (88 KB)PASS
Web fonts
3
88 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall203 requests over 4073msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.foxnews.com www.foxnews.com | Other | 921ms | 72 KB | — | $12/mo | Costly |
Unattributable Unattributable | Other | 496ms | 0 KB | — | $7/mo | Costly |
prod.fennec.atp.fox prod.fennec.atp.fox | Other | 480ms | 187 KB | — | $6/mo | Costly |
static.foxnews.com static.foxnews.com | Other | 343ms | 92 KB | 50% | $5/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 323ms | 0 KB | 48% | $4/mo | Costly |
static.foxnews.com static.foxnews.com | Other | 102ms | 0 KB | — | $1/mo | Optional |
static.foxnews.com static.foxnews.com | Other | 91ms | 123 KB | 40% | $1/mo | Optional |
static.foxnews.com static.foxnews.com | Other | 74ms | 26 KB | — | $1/mo | Optional |
js.appboycdn.com js.appboycdn.com | Other | 61ms | 63 KB | 52% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.foxnews.com adds 921ms and costs ~$12/month
- Unattributable adds 496ms and costs ~$7/month
- prod.fennec.atp.fox adds 480ms and costs ~$6/month
- static.foxnews.com adds 343ms and costs ~$5/month
- www.gstatic.com adds 323ms and costs ~$4/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
www.foxnews.com takes 921ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 496ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
prod.fennec.atp.fox takes 480ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
static.foxnews.com takes 343ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
50% of static.foxnews.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
www.gstatic.com takes 323ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
52% of js.appboycdn.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev