SECURITY REPORT · EXTENSHI SCAN
YouTube 4K Downloader
Firefox extension·by Extension Kit
0
/ 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
YouTube 4K Downloader's safety score vs every other extension we've scanned
Globally
79.34%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
69.34%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
8
median 38Lower is safer
Risky permissions
1
median 1Critical + high perms
Total permissions
3
median 4All declared perms
Critical findings
1
median 2Severity = Critical
Findings breakdown
Automated security signal · 8 distinct issues across 6 severities
8
distinct issues
detected
detected
Scanners reported 10 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical113%
High113%
Needs Review00%
Medium450%
Low225%
Info00%
Permissions requested
1 risky permission of 3 total
1 high-risk permission require attention
This extension requests 3 permissions in total. 1 of them grant broad capabilities that are worth a careful look.
High
Manage downloads
Can initiate downloads and access your download history
Medium
Store local data
Can save data locally in the browser for persistence
Info
https://www.youtube.com/*
No additional information available.
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Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
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