SECURITY REPORT · EXTENSHI SCAN
Overlay WebM
Firefox extension·by alternate-squared
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
Overlay WebM's safety score vs every other extension we've scanned
Globally
94.97%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
84.97%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
4
median 38Lower is safer
Risky permissions
1
median 1Critical + high perms
Total permissions
2
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%
High00%
Needs Review00%
Medium250%
Low250%
Info00%
Permissions requested
1 risky permission of 2 total
1 critical permission require attention
This extension requests 2 permissions in total. 1 of them grant broad capabilities that are worth a careful look.
Critical
Access to all websites
Can read and modify content on every website you visit
Medium
Store local data
Can save data locally in the browser for persistence
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Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
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