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https://free.fr

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
4
REVIEW
4
PASS
5
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

68
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.14 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

4.70 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

61 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.004

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.97 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.

4.75 s

Page Load Progression

468 ms
935 ms
1.4 s
1.9 s
2.3 s
2.8 s
3.3 s
3.7 s
Checks
15
5 PASS 4 REVIEW 4 FIX
F
Page Weight Budget
Action
8.5 MB transferred, 88 requests
FIX
8.5 MB transferred, 88 requests
Critical::
Page weighs 10.7 MB (8.5 MB transferred)
Warning::
Images are 7.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 7.2 MB
Info::
Fonts are 598 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 598 KB
Warning::
JavaScript is 546 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 546 KB
Info::
88 HTTP requests
Info::
Estimated 1.8 g CO2 per page load
8.5 MB / 2.4 MB budget
8.5 MB transferred
88 requests
1.8 g CO2 per page load
Images 7.2 MiB 85%
Fonts 598.1 KiB 7%
JavaScript 545.6 KiB 6%
Other 112.7 KiB 1%
CSS 44.1 KiB 1%
HTML 31.7 KiB 0%
Other 3.6 KiB 0%
Other 485 B 0%
Other 229 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (8.5 MiB of 8.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
88 resources · 8.5 MB · 104 KB savings available
FIX
88 resources · 8.5 MB · 104 KB savings available
Warning::
Page weight 7.5 MB over 1MB target
Got: 8.5 MB Expected: ≤ 1 MB
Info::
~104 KB of savings available
Warning::
87 third-party resources (100% of weight)
Info::
11 resources over 200KB
88 resources · 8.5 MiB · 87 third-party 7.5 MiB over 1MB target
Image 85% · 7.2 MiB
Font 7% · 598.1 KiB
JavaScript 6% · 545.6 KiB
Other 1% · 113.4 KiB
CSS 1% · 44.1 KiB
Document 0% · 32.0 KiB

~104.2 KiB of savings available

Remove unused JavaScript: 104.2 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
42 images, 0 KB saveable
REVIEW
42 images, 0 KB saveable
Warning::
https://www.free.fr/assets/footer/icons/plus-icon.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.free.fr/assets/navHeader/icons/free.sv... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.free.fr/assets/icon/home/logo-canal-pl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.free.fr/assets/img/freebox/home/cards/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.free.fr/assets/img/freebox/home/cards/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://freebox.cdn.scw.iliad.fr/medium_image_assi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://freebox.cdn.scw.iliad.fr/boutiques_free_df... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://freebox.cdn.scw.iliad.fr/fibre_free_3da6fc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.free.fr/assets/icon/home/logo-prime.sv... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.free.fr/data/icon_footer/free.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.free.fr/assets/icon/home/logo-7.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.free.fr/assets/icon/freeTvPlus/picto-f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.free.fr/assets/icon/home/logo-universa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.free.fr/assets/icon/home/logo-netflix.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://freebox.cdn.scw.iliad.fr/large_free_family... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.free.fr/assets/icon/home/logo-disney-p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
42 images 7.2 MB
0 oversized -0 KB
42 legacy format
16 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1432ms total JS execution
REVIEW
1432ms total JS execution
Warning::
https://www.free.fr/freebox: 437ms CPU time
Warning::
https://www.free.fr/_next/static/chunks/framework-...: 332ms CPU time
Warning::
Unattributable: 329ms CPU time
Info::
https://www.free.fr/_next/static/chunks/9287-818be...: 155ms CPU time
Info::
https://www.free.fr/_next/static/chunks/pages/_app...: 65ms CPU time
Warning::
Third-party scripts: 1432ms (100% of total)

Main Thread Breakdown

Script Evaluation 34% Other 28% Style & Layout 25% Rendering 5% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://www.free.fr/freebox437ms1ms0ms3rd
https://www.free.fr/_next/static/chunks/framework-945b357d4a851f4b.js332ms253ms7ms3rd
Unattributable329ms15ms0ms3rd
https://www.free.fr/_next/static/chunks/9287-818be36ecbda0ef2.js155ms55ms3ms3rd
https://www.free.fr/_next/static/chunks/pages/_app-1fb0f6bd6170d9ed.js65ms52ms13ms3rd
https://sdk.privacy-center.org/sdk/ccd75f3fd1e3bfdd8b4938d8a0c206149f135f03/modern/ui-web-en-web.ccd75f3fd1e3bfdd8b4938d8a0c206149f135f03.js60ms35ms12ms3rd
https://sdk.privacy-center.org/sdk/ccd75f3fd1e3bfdd8b4938d8a0c206149f135f03/modern/sdk.ccd75f3fd1e3bfdd8b4938d8a0c206149f135f03.js55ms45ms10ms3rd
B
JS Bundles
20 scripts, 104 KB unused
REVIEW
20 scripts, 104 KB unused
Warning::
https://sdk.privacy-center.org/sdk/ccd75f3fd1e3bfd...: 54 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.free.fr/_next/static/chunks/pages/_app...: 50 KB unused (31%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 104 KB
104 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://sdk.privacy-center.org/sdk/ccd75f3fd1e3bfdd8b4938d8a0c206149f135f03/modern/sdk.ccd75f3fd1e3bfdd8b4938d8a0c206149f135f03.js102 KB54 KB (53%)3rd
https://www.free.fr/_next/static/chunks/pages/_app-1fb0f6bd6170d9ed.js164 KB50 KB (31%)3rd
https://www.free.fr/_next/static/chunks/4886-7ccdba29ee1ff978.js7 KB3rd
https://www.free.fr/_next/static/chunks/6915-5b0afa43e3db5fce.js4 KB3rd
https://www.free.fr/_next/static/chunks/framework-945b357d4a851f4b.js44 KB3rd
https://www.free.fr/_next/static/chunks/c16184b3-d1c155136a7c92d1.js1 KB3rd
https://www.free.fr/_next/static/chunks/3679-a9a4da3915b4fda3.js13 KB3rd
https://www.free.fr/_next/static/chunks/9359-b953d6c4c53cdadf.js10 KB3rd
https://www.free.fr/_next/static/chunks/9603-6678331badd40003.js19 KB3rd
https://www.free.fr/_next/static/chunks/9287-818be36ecbda0ef2.js31 KB3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
8 fonts (598 KB)
PASS
8 fonts (598 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

598 KB total

Render-blocking

0

of 8

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.1 s LCP 4.7 shttps://www.free.fr/_next/static/media/Montserrat-Medium.38692f8f.woff2Montserrat-Medium.38692... https://www.free.fr/_next/static/media/Montserrat-Medium.38692f8f.woff2 — 83.4 KiB — 395 ms — font-display: swaphttps://www.free.fr/_next/static/media/icons.2e74bc6c.ttficons.2e74bc6c.ttf https://www.free.fr/_next/static/media/icons.2e74bc6c.ttf — 219.1 KiB — 448 ms — font-display: swaphttps://www.free.fr/_next/static/media/Montserrat-Bold.3b7969f4.woff2Montserrat-Bold.3b7969f... https://www.free.fr/_next/static/media/Montserrat-Bold.3b7969f4.woff2 — 83.8 KiB — 448 ms — font-display: swaphttps://www.free.fr/_next/static/media/Iliad-Bold.72c27688.woffIliad-Bold.72c27688.woff https://www.free.fr/_next/static/media/Iliad-Bold.72c27688.woff — 16.5 KiB — 493 ms — font-display: swaphttps://www.free.fr/_next/static/media/Montserrat-SemiBold.bd13e302.woff2Montserrat-SemiBold.bd1... https://www.free.fr/_next/static/media/Montserrat-SemiBold.bd13e302.woff2 — 83.3 KiB — 566 ms — font-display: swaphttps://www.free.fr/_next/static/media/Montserrat-Regular.02605988.woff2Montserrat-Regular.0260... https://www.free.fr/_next/static/media/Montserrat-Regular.02605988.woff2 — 83.4 KiB — 566 ms — font-display: swaphttps://www.free.fr/_next/static/media/Iliad-Regular.8529fb7d.woffIliad-Regular.8529fb7d.... https://www.free.fr/_next/static/media/Iliad-Regular.8529fb7d.woff — 16.1 KiB — 562 ms — font-display: swaphttps://www.free.fr/_next/static/media/Montserrat-Light.66b0cd06.woff2Montserrat-Light.66b0cd... https://www.free.fr/_next/static/media/Montserrat-Light.66b0cd06.woff2 — 12.5 KiB — 506 ms — font-display: swap
Montserrat-Medium.38692... woff2 swap
Size 83 KB
Load time 395 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
icons.2e74bc6c.ttf ttf swap
Size 219 KB
Load time 448 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Montserrat-Bold.3b7969f... woff2 swap
Size 84 KB
Load time 448 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
Iliad-Bold.72c27688.woff woff swap
Size 16 KB
Load time 493 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Montserrat-SemiBold.bd1... woff2 swap
Size 83 KB
Load time 566 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
Montserrat-Regular.0260... woff2 swap
Size 83 KB
Load time 566 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
Iliad-Regular.8529fb7d.... woff swap
Size 16 KB
Load time 562 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Montserrat-Light.66b0cd... woff2 swap
Size 13 KB
Load time 506 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
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)

Fixing the unchecked items could save ~185 KB and ~370 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
88 requests over 4295ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.1 s LCP 4.7 shttps://free.fr// https://free.fr/ — 301 — 76 B — 441 ms — h2https://www.free.fr/www.free.fr/ https://www.free.fr/ — 302 — 175 B — 154 ms — h2https://www.free.fr/freeboxwww.free.fr/freebox https://www.free.fr/freebox — 200 — 31.7 KiB — 287 ms — h2https://freebox.cdn.scw.iliad.fr/FAS_offerts_3840x640_desktop_03122025_2_53a394850c.jpgfreebox.cdn.scw.iliad.fr/FAS_offert... https://freebox.cdn.scw.iliad.fr/FAS_offerts_3840x640_desktop_03122025_2_53a394850c.jpg — 200 — 172.6 KiB — 2.8 s — h2https://www.free.fr/data/env-config.js?1776178379175www.free.fr/data/env-config.js?1776... https://www.free.fr/data/env-config.js?1776178379175 — 200 — 844 B — 151 ms — h2https://www.free.fr/_next/static/css/af4e938243dc3760.csswww.free.fr/_next/static/css/af4e93... https://www.free.fr/_next/static/css/af4e938243dc3760.css — 200 — 43.7 KiB — 151 ms — h2https://www.free.fr/_next/static/css/fe6f99b5fbcd1011.csswww.free.fr/_next/static/css/fe6f99... https://www.free.fr/_next/static/css/fe6f99b5fbcd1011.css — 200 — 480 B — 148 ms — h2https://www.free.fr/assets/navHeader/icons/free.svgwww.free.fr/assets/navHeader/icons/... https://www.free.fr/assets/navHeader/icons/free.svg — 200 — 5.5 KiB — 284 ms — h2https://www.free.fr/assets/navHeader/icons/mail.svgwww.free.fr/assets/navHeader/icons/... https://www.free.fr/assets/navHeader/icons/mail.svg — 200 — 798 B — 285 ms — h2https://www.free.fr/assets/navHeader/icons/arrow-to-right.svgwww.free.fr/assets/navHeader/icons/... https://www.free.fr/assets/navHeader/icons/arrow-to-right.svg — 200 — 1.0 KiB — 159 ms — h2https://www.free.fr/assets/navHeader/icons/contact.svgwww.free.fr/assets/navHeader/icons/... https://www.free.fr/assets/navHeader/icons/contact.svg — 200 — 957 B — 161 ms — h2https://www.free.fr/assets/navHeader/icons/portal.svgwww.free.fr/assets/navHeader/icons/... https://www.free.fr/assets/navHeader/icons/portal.svg — 200 — 829 B — 163 ms — h2https://www.free.fr/manifest.jsonwww.free.fr/manifest.json https://www.free.fr/manifest.json — 200 — 485 B — 164 ms — h2https://freebox.cdn.scw.iliad.fr/FREEBOXPOP_homepage_3840x640_cf1413c2e4.pngfreebox.cdn.scw.iliad.fr/FREEBOXPOP... https://freebox.cdn.scw.iliad.fr/FREEBOXPOP_homepage_3840x640_cf1413c2e4.png — 200 — 467.7 KiB — 2.7 s — h2https://freebox.cdn.scw.iliad.fr/EUPHORIA_Free_3840x640_8d1ec7a522.pngfreebox.cdn.scw.iliad.fr/EUPHORIA_F... https://freebox.cdn.scw.iliad.fr/EUPHORIA_Free_3840x640_8d1ec7a522.png — 200 — 518.9 KiB — 2.5 s — h2https://www.free.fr/assets/img/home/freebox-pop-player-tv.pngwww.free.fr/assets/img/home/freebox... https://www.free.fr/assets/img/home/freebox-pop-player-tv.png — 200 — 221.6 KiB — 290 ms — h2https://www.free.fr/_next/static/media/Montserrat-Medium.38692f8f.woff2www.free.fr/_next/static/media/Mont... https://www.free.fr/_next/static/media/Montserrat-Medium.38692f8f.woff2 — 200 — 83.4 KiB — 395 ms — 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https://www.free.fr/assets/footer/socialMedia/linkedin.svg — 200 — 812 B — 155 ms — h2https://www.free.fr/assets/footer/socialMedia/snapchat.svgwww.free.fr/assets/footer/socialMed... https://www.free.fr/assets/footer/socialMedia/snapchat.svg — 200 — 1.7 KiB — 157 ms — h2https://www.free.fr/assets/img/freebox/home/banner/assistance.jpgwww.free.fr/assets/img/freebox/home... https://www.free.fr/assets/img/freebox/home/banner/assistance.jpg — 200 — 2.3 MiB — 585 ms — h2https://www.free.fr/assets/img/freebox/home/cards/all-offers-bg.pngwww.free.fr/assets/img/freebox/home... https://www.free.fr/assets/img/freebox/home/cards/all-offers-bg.png — 200 — 455.8 KiB — 615 ms — h2https://www.free.fr/assets/img/freebox/devices/box-5g/our-offers-freebox/box-5g.pngwww.free.fr/assets/img/freebox/devi... https://www.free.fr/assets/img/freebox/devices/box-5g/our-offers-freebox/box-5g.png — 200 — 99.2 KiB — 617 ms — h2https://www.free.fr/assets/img/services/free-tv-plus/application-free-tv-plus.jpgwww.free.fr/assets/img/services/fre... https://www.free.fr/assets/img/services/free-tv-plus/application-free-tv-plus.jpg — 200 — 62.3 KiB — 475 ms — h2https://www.free.fr/assets/img/others/free-app/free-app.jpgwww.free.fr/assets/img/others/free-... https://www.free.fr/assets/img/others/free-app/free-app.jpg — 200 — 166.3 KiB — 621 ms — h2https://www.free.fr/assets/footer/icons/plus-icon.svgwww.free.fr/assets/footer/icons/plu... https://www.free.fr/assets/footer/icons/plus-icon.svg — 200 — 770 B — 475 ms — h2https://www.free.fr/favicon.icowww.free.fr/favicon.ico https://www.free.fr/favicon.ico — 200 — 1.8 KiB — 144 ms — h2https://www.free.fr/assets/img/shared/fav/favicon-32x32.pngwww.free.fr/assets/img/shared/fav/f... https://www.free.fr/assets/img/shared/fav/favicon-32x32.png — 200 — 1.5 KiB — 145 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 1432ms · 426KB · €6/mo
www.free.fr
Other
Costly
Execution 437ms
Transfer 32 KB
Monthly Cost €2/mo
www.free.fr
Other
Costly
Execution 332ms
Transfer 44 KB
Monthly Cost €1/mo
Unattributable
Other
Costly
Execution 329ms
Transfer 0 KB
Monthly Cost €1/mo
www.free.fr
Other
Optional
Execution 155ms
Transfer 31 KB
Monthly Cost €1/mo
www.free.fr
Other
Optional
Execution 65ms
Transfer 164 KB
Unused 31%
Monthly Cost €0/mo
sdk.privacy-center.org
Other
Optional
Execution 60ms
Transfer 54 KB
Monthly Cost €0/mo
sdk.privacy-center.org
Other
Optional
Execution 55ms
Transfer 102 KB
Unused 53%
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • www.free.fr adds 437ms and costs ~€2/month
  • www.free.fr adds 332ms and costs ~€1/month
  • Unattributable adds 329ms and costs ~€1/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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.free.fr takes 437ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.free.fr takes 332ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 329ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

53% of sdk.privacy-center.org's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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