SECURITY REPORT · EXTENSHI SCAN
Client Challenge
Firefox extension·by 私立メロン高校パソコン部
77
/ 100 SAFETY SCORE
CAUTION
Mostly fine, but a few things worth reviewing before you install.
Automated analysis of publicly available code — not a professional security audit. It may produce false positives and does not prove an extension is unsafe or safe. Treat it as one signal among many. Disclaimer · Report an issue
How it ranks
Client Challenge's safety score vs every other extension we've scanned
Globally
31%of extensions carry more risk
Riskier ←→ Safer
Ranked against 401,999 extensions
In Photos Music Videos
15%of photos music videos extensions carry more risk
Riskier ←→ Safer
Ranked against 11,114 photos music videos extensions
Findings
12
median 4Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
5
median 3Declared in manifest
Active users
76
median 6vs category median
Findings breakdown
Automated security signal · 12 distinct issues across 6 severities
12
distinct issues
detected
detected
Critical18%
High325%
Needs Review00%
Medium542%
Low325%
Info00%
Permissions requested
3 risky permissions of 5 total
3 high-risk permissions require attention
This extension requests 5 permissions in total. 3 of them grant broad capabilities that are worth a careful look.
High
Access browser cookies
Can read and modify cookies, potentially accessing login sessions
High
Manage downloads
Can initiate downloads and access your download history
High
View open tabs
Can see URLs and titles of all open tabs
Medium
Store local data
Can save data locally in the browser for persistence
Info
*://*/*/
No additional information available.
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Scan performed by extenshi.io · Aug 25, 2026
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