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SECURITY REPORT · EXTENSHI SCAN

H.264

Firefox extension·by Kirill
78
/ 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

H.264's safety score vs every other extension we've scanned
Globally
33%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 409,596 extensions
In Photos Music Videos
16%of photos music videos extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 11,192 photos music videos extensions
Findings
10
median 4Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
8
median 3Declared in manifest
Active users
67
median 6vs category median

Findings breakdown

Automated security signal · 10 distinct issues across 6 severities
10
distinct issues
detected

Permissions requested

4 risky permissions of 8 total
1 critical permission require attention
This extension requests 8 permissions in total. 4 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

High
View open tabs

Can see URLs and titles of all open tabs

High
Observe web requests

Can monitor all network requests made by the browser

High
Block and modify web requests

Can intercept, block, or modify any network request before it completes

Medium
Store local data

Can save data locally in the browser for persistence

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

No additional information available.

Info
*://*.youtube-nocookie.com/*

No additional information available.

Info
*://*.youtu.be/*

No additional information available.

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Scan performed by extenshi.io · Sep 20, 2026
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