SECURITY REPORT · EXTENSHI SCAN
Hermes
Firefox extension·by Cassy Technology Company
75
/ 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
Hermes's safety score vs every other extension we've scanned
Globally
25%of extensions carry more risk
Riskier ←→ Safer
Ranked against 415,831 extensions
In Other
10%of other extensions carry more risk
Riskier ←→ Safer
Ranked against 28,822 other extensions
Findings
106
median 5Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
3
median 3Declared in manifest
Active users
1
median 2vs category median
Findings breakdown
Automated security signal · 106 distinct issues across 6 severities
106
distinct issues
detected
detected
Critical11%
High11%
Needs Review11%
Medium10296%
Low11%
Info00%
Permissions requested
2 risky permissions of 3 total
2 high-risk permissions require attention
This extension requests 3 permissions in total. 2 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
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
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Scan performed by extenshi.io · Oct 22, 2026
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