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SECURITY REPORT · EXTENSHI SCAN

MetaMask Legacy Web3

Firefox extension·by danfinlay
55
/ 100 SAFETY SCORE
RISKY
Several elevated signals. Read the findings before sharing this with your team.

Likely abandonedsafety score reduced by 30 points

  • No update in over 5 years
Why this matters

An unmaintained extension keeps whatever flaws it shipped with, and a listing with users but no owner is an attractive target to buy and repurpose.

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

MetaMask Legacy Web3's safety score vs every other extension we've scanned
Globally
54%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 397,380 extensions
In Other
23%of other extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 28,696 other extensions
Findings
14
median 3Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
3
median 3Declared in manifest
Active users
1057
median 2vs category median

Findings breakdown

Automated security signal · 14 distinct issues across 6 severities
14
distinct issues
detected

Permissions requested

3 risky permissions of 3 total
3 high-risk permissions require attention
This extension requests 3 permissions in total. 3 of them grant broad capabilities that are worth a careful look.
High
Access all HTTP sites

Can read and modify content on all non-encrypted websites

High
Access all HTTPS sites

Can read and modify content on all encrypted websites

High
Access local files

Can read files on your local filesystem opened in the browser

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Scan performed by extenshi.io · Aug 17, 2026
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