SECURITY REPORT · EXTENSHI SCAN
CaptionMaster Ultimate
Firefox extension·by Thandor
0
/ 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
CaptionMaster Ultimate's safety score vs every other extension we've scanned
Globally
66.05%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
56.05%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
48
median 38Lower is safer
Risky permissions
0
median 1Critical + high perms
Total permissions
20
median 4All declared perms
Critical findings
0
median 2Severity = Critical
Findings breakdown
Automated security signal · 48 findings across 5 severities
48
findings
detected
detected
Critical00%
High00%
Medium3471%
Low1123%
Info36%
Permissions requested
20 permissions declared
No risky permissions
20 permissions requested — none are flagged as risky.
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Monitor navigation
Can observe and track tab navigation events and URL changes
Medium
Access user identity
Can get OAuth2 tokens and access your Google account identity
Info
https://*.youtube.com/*
No additional information available.
Info
https://*.tver.jp/*
No additional information available.
Info
https://*.nicovideo.jp/*
No additional information available.
Info
https://*.vimeo.com/*
No additional information available.
Info
https://*.bilibili.com/*
No additional information available.
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Scan performed by extenshi.io · Jun 25, 2026· partial run (some scanners failed)
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