SECURITY REPORT · EXTENSHI SCAN
Client Challenge
Firefox extension·by イスターリャ
65
/ 100 SAFETY SCORE
RISKY
Several elevated signals. Read the findings before sharing this with your team.
Likely abandonedsafety score reduced by 30 points
- No update in over 5 years
Why this matters
An unmaintained extension keeps whatever flaws it shipped with, and a listing with users but no owner is an attractive target to buy and repurpose.
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
76%of extensions carry more risk
Riskier ←→ Safer
Ranked against 402,594 extensions
In Social & Communication
57%of social & communication extensions carry more risk
Riskier ←→ Safer
Ranked against 13,641 social & communication extensions
Findings
6
median 5Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
3
median 3Declared in manifest
Active users
3
median 3vs category median
Findings breakdown
Automated security signal · 6 distinct issues across 6 severities
6
distinct issues
detected
detected
Critical00%
High00%
Needs Review00%
Medium117%
Low467%
Info117%
Permissions requested
3 permissions declared
No risky permissions
3 permissions requested — none are flagged as risky.
Info
*://www.nicovideo.jp/*
No additional information available.
Info
*://www.upload.nicovideo.jp/*
No additional information available.
Info
*://nvapi.nicovideo.jp/v2/users/me/videos/*
No additional information available.
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Scan performed by extenshi.io · Aug 25, 2026
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