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
16 images, 0 KB saveable
REVIEW
16 images, 0 KB saveable
Warning::
!
https://www.ericsson.com/49455b/assets/global/qban... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ericsson.com/4ab92c/assets/global/qban... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ericsson.com/4abf45/assets/global/qban... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
16images1.0 MB
0oversized-0 KB
7legacy format
3missing dimensionsCLS 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
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
5 fonts (175 KB)
PASS
5 fonts (175 KB)
Info::
i
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
175 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
ericsson-hilda-regular....woff2swap
Size38 KB
Load time39 ms
Start566 ms
RiskFOUT — text flashes from fallback to web font
ericsson-icons.ttfttfswap
Size23 KB
Load time40 ms
Start566 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
ericsson-hilda-light.woff2woff2swap
Size38 KB
Load time40 ms
Start567 ms
RiskFOUT — text flashes from fallback to web font
ericsson-hilda-bold.woff2woff2swap
Size38 KB
Load time41 ms
Start567 ms
RiskFOUT — text flashes from fallback to web font
ericsson-hilda-medium.w...woff2swap
Size38 KB
Load time40 ms
Start567 ms
RiskFOUT — 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 ~7 KB and ~14 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
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
✓
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
81 requests over 5517ms
INFO
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-party10515ms · 918KB · $140/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.ericsson.com
www.ericsson.com
Other
3585ms
28 KB
—
$48/mo
Costly
www.ericsson.com
www.ericsson.com
Other
2500ms
31 KB
—
$33/mo
Costly
Unattributable
Unattributable
Other
763ms
0 KB
—
$10/mo
Costly
js.monitor.azure.com
js.monitor.azure.com
Other
634ms
46 KB
—
$8/mo
Costly
cdn.consentmanager.net
cdn.consentmanager.net
Other
568ms
14 KB
—
$8/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
543ms
160 KB
33%
$7/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
383ms
146 KB
42%
$5/mo
Costly
www.ericsson.com
www.ericsson.com
Other
344ms
13 KB
—
$5/mo
Costly
www.ericsson.com
www.ericsson.com
Other
271ms
8 KB
—
$4/mo
Costly
cdn.consentmanager.net
cdn.consentmanager.net
Other
177ms
5 KB
—
$2/mo
Optional
www.ericsson.com
www.ericsson.com
Other
170ms
3 KB
—
$2/mo
Optional
www.ericsson.com
www.ericsson.com
Other
105ms
208 KB
58%
$1/mo
Optional
www.ericsson.com
www.ericsson.com
Other
103ms
38 KB
64%
$1/mo
Optional
cdn.consentmanager.net
cdn.consentmanager.net
Other
102ms
101 KB
39%
$1/mo
Optional
delivery.consentmanager.net
delivery.consentmanager.net
Other
74ms
3 KB
—
$1/mo
Optional
www.ericsson.com
www.ericsson.com
Other
70ms
11 KB
—
$1/mo
Optional
static.cloudflareinsights.com
static.cloudflareinsights.com
Other
69ms
11 KB
—
$1/mo
Optional
www.ericsson.com
www.ericsson.com
Other
53ms
92 KB
—
$1/mo
Optional
www.ericsson.com
Other
Costly
Execution3585ms
Transfer28 KB
Monthly Cost$48/mo
www.ericsson.com
Other
Costly
Execution2500ms
Transfer31 KB
Monthly Cost$33/mo
Unattributable
Other
Costly
Execution763ms
Transfer0 KB
Monthly Cost$10/mo
js.monitor.azure.com
Other
Costly
Execution634ms
Transfer46 KB
Monthly Cost$8/mo
cdn.consentmanager.net
Other
Costly
Execution568ms
Transfer14 KB
Monthly Cost$8/mo
Google Tag Manager
Tag Manager
Costly
Execution543ms
Transfer160 KB
Unused33%
Monthly Cost$7/mo
Google Tag Manager
Tag Manager
Costly
Execution383ms
Transfer146 KB
Unused42%
Monthly Cost$5/mo
www.ericsson.com
Other
Costly
Execution344ms
Transfer13 KB
Monthly Cost$5/mo
www.ericsson.com
Other
Costly
Execution271ms
Transfer8 KB
Monthly Cost$4/mo
cdn.consentmanager.net
Other
Optional
Execution177ms
Transfer5 KB
Monthly Cost$2/mo
www.ericsson.com
Other
Optional
Execution170ms
Transfer3 KB
Monthly Cost$2/mo
www.ericsson.com
Other
Optional
Execution105ms
Transfer208 KB
Unused58%
Monthly Cost$1/mo
www.ericsson.com
Other
Optional
Execution103ms
Transfer38 KB
Unused64%
Monthly Cost$1/mo
cdn.consentmanager.net
Other
Optional
Execution102ms
Transfer101 KB
Unused39%
Monthly Cost$1/mo
delivery.consentmanager.net
Other
Optional
Execution74ms
Transfer3 KB
Monthly Cost$1/mo
www.ericsson.com
Other
Optional
Execution70ms
Transfer11 KB
Monthly Cost$1/mo
static.cloudflareinsights.com
Other
Optional
Execution69ms
Transfer11 KB
Monthly Cost$1/mo
www.ericsson.com
Other
Optional
Execution53ms
Transfer92 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
www.ericsson.com adds 3585ms and costs ~$48/month
www.ericsson.com adds 2500ms and costs ~$33/month
Unattributable adds 763ms and costs ~$10/month
js.monitor.azure.com adds 634ms and costs ~$8/month
cdn.consentmanager.net adds 568ms and costs ~$8/month
Google Tag Manager adds 543ms and costs ~$7/month
Google Tag Manager adds 383ms and costs ~$5/month
www.ericsson.com adds 344ms and costs ~$5/month
www.ericsson.com adds 271ms and costs ~$4/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.ericsson.com takes 3585ms 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.ericsson.com takes 2500ms 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 763ms 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
js.monitor.azure.com takes 634ms 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
cdn.consentmanager.net takes 568ms 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
Google Tag Manager takes 543ms 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
Google Tag Manager takes 383ms 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.ericsson.com takes 344ms 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.ericsson.com takes 271ms 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
58% of www.ericsson.com'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
64% of www.ericsson.com'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.