SECURITY REPORT · EXTENSHI SCAN
CaptionSubtitleTool
Firefox extension·by Firefox user 15314155
0
/ 100 SAFETY SCORE
EXCELLENT
Looks clean. No meaningful risks detected in this scan.
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
CaptionSubtitleTool's safety score vs every other extension we've scanned
Globally
95.69%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
85.69%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
4
median 38Lower is safer
Risky permissions
10
median 1Critical + high perms
Total permissions
14
median 4All declared perms
Critical findings
0
median 2Severity = Critical
Findings breakdown
Automated security signal · 4 distinct issues across 6 severities
4
distinct issues
detected
detected
Critical00%
High125%
Needs Review00%
Medium375%
Low00%
Info00%
Permissions requested
10 risky permissions of 14 total
10 high-risk permissions require attention
This extension requests 14 permissions in total. 10 of them grant broad capabilities that are worth a careful look.
High
Execute scripts in pages
Can inject and execute JavaScript code in web pages
High
Observe web requests
Can monitor all network requests made by the browser
High
Block and modify web requests
Can intercept, block, or modify any network request before it completes
High
Filter service worker scripts
Can intercept and modify service worker scripts
High
Filter responses
Can filter and modify HTTP response bodies
High
Execute scripts in pages(optional)
Can inject and execute JavaScript code in web pages
Medium
Store local data
Can save data locally in the browser for persistence
Low
Schedule tasks
Can schedule periodic background tasks
Info
*://*/*
No additional information available.
Info
*://*.youtube.com/*
No additional information available.
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Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
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