SECURITY REPORT · EXTENSHI SCAN
Youtube Customiser
Firefox extension·by Erlend Eelmets
0
/ 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
Youtube Customiser's safety score vs every other extension we've scanned
Globally
61%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Social & Communication
37%of social & communication extensions carry more risk
Riskier ←→ Safer
Ranked against 12,741 social & communication extensions
Findings
7
median 4Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
3
median 3Declared in manifest
Active users
2
median 3vs category median
Findings breakdown
Automated security signal · 7 distinct issues across 6 severities
7
distinct issues
detected
detected
Scanners reported 9 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical00%
High114%
Needs Review00%
Medium457%
Low114%
Info114%
Permissions requested
3 permissions declared
No risky permissions
3 permissions requested — none are flagged as risky.
Medium
Store local data
Can save data locally in the browser for persistence
Info
http://www.youtube.com/*
No additional information available.
Info
https://www.youtube.com/*
No additional information available.
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Scan performed by extenshi.io · Aug 25, 2026
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