SECURITY REPORT · EXTENSHI SCAN
SeikisoViewer
Firefox extension·by なかむーら
76
/ 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
SeikisoViewer's safety score vs every other extension we've scanned
Globally
16%of extensions carry more risk
Riskier ←→ Safer
Ranked against 415,874 extensions
In Photos Music Videos
9%of photos music videos extensions carry more risk
Riskier ←→ Safer
Ranked against 11,273 photos music videos extensions
Findings
145
median 7Lower is safer
Critical findings
2
median 0Severity = Critical
Permissions
5
median 3Declared in manifest
Active users
150
median 6vs category median
Findings breakdown
Automated security signal · 145 distinct issues across 6 severities
145
distinct issues
detected
detected
Critical21%
High8156%
Needs Review00%
Medium5941%
Low32%
Info00%
Permissions requested
1 risky permission of 5 total
1 high-risk permission require attention
This extension requests 5 permissions in total. 1 of them grant broad capabilities that are worth a careful look.
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
https://*.youtube.com/*
No additional information available.
Info
https://www.youtube.com/channel/*/live
No additional information available.
Info
https://*.youtube.com/live_chat*
No additional information available.
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Scan performed by extenshi.io · Oct 22, 2026
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