SECURITY REPORT · EXTENSHI SCAN
Mr. Block
Firefox extension·by HullPerse
0
/ 100 SAFETY SCORE
EXCELLENT
Looks clean. No meaningful risks detected in this scan.
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
Mr. Block's safety score vs every other extension we've scanned
Globally
64%of extensions carry more risk
Riskier ←→ Safer
Ranked against 347,108 extensions
In Appearance
26%of appearance extensions carry more risk
Riskier ←→ Safer
Ranked against 15,709 appearance extensions
Findings
6
median 3Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
7
median 2Declared in manifest
Active users
1
median 4vs category median
Findings breakdown
Automated security signal · 6 distinct issues across 6 severities
6
distinct issues
detected
detected
Scanners reported 8 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical00%
High00%
Needs Review00%
Medium583%
Low117%
Info00%
Permissions requested
4 risky permissions of 7 total
1 critical permission require attention
This extension requests 7 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
Access browser cookies
Can read and modify cookies, potentially accessing login sessions
High
Manage downloads
Can initiate downloads and access your download history
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Access current tab
Can temporarily access the content of the active tab when you click the extension
Low
Block network requests (declarative)
Can block or redirect network requests using predefined rules without seeing content
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Scan performed by extenshi.io · Aug 18, 2026
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