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SECURITY REPORT · EXTENSHI SCAN

YouTube Nyan Cat - Meow Meow

Firefox extension·by codehemu
42
/ 100 SAFETY SCORE
RISKY
Several elevated signals. Read the findings before sharing this with your team.

Abandonedsafety score reduced by 40 points

  • No update in over 4 years
  • The developer's website is no longer reachable
  • Built on Manifest V2, which Chrome and Edge are retiring
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

YouTube Nyan Cat - Meow Meow's safety score vs every other extension we've scanned
Globally
43%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 409,539 extensions
In Entertainment
35%of entertainment extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 4,552 entertainment extensions
Findings
11
median 12Lower is safer
Critical findings
2
median 0Severity = Critical
Permissions
4
median 0Declared in manifest
Active users
37
median 55vs category median

Findings breakdown

Automated security signal · 11 distinct issues across 6 severities
11
distinct issues
detected

Permissions requested

2 risky permissions of 4 total
2 high-risk permissions require attention
This extension requests 4 permissions in total. 2 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

Medium
Store local data

Can save data locally in the browser for persistence

Info
*://*.youtube.com/*

No additional information available.

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Scan performed by extenshi.io · Aug 7, 2026
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