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SECURITY REPORT · EXTENSHI SCAN

M-block

Firefox extension·by Matej
73
/ 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

M-block's safety score vs every other extension we've scanned
Globally
19%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 409,539 extensions
In Privacy & Security
14%of privacy & security extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 12,541 privacy & security extensions
Findings
14
median 5Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
6
median 4Declared in manifest
Active users
2
median 3vs category median

Findings breakdown

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

Permissions requested

3 risky permissions of 6 total
1 critical permission require attention
This extension requests 6 permissions in total. 3 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
Execute scripts in pages

Can inject and execute JavaScript code in web pages

Medium
Store local data

Can save data locally in the browser for persistence

Low
Block network requests (declarative)

Can block or redirect network requests using predefined rules without seeing content

Low
View blocked request stats

Can see which declarative rules matched network requests

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Scan performed by extenshi.io · Aug 30, 2026
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