SECURITY REPORT · EXTENSHI SCAN
MATTRN Cleaner
Chrome extension·by MATTRN Studio
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
MATTRN Cleaner's safety score vs every other extension we've scanned
Globally
22%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Productivity
30%of productivity extensions carry more risk
Riskier ←→ Safer
Ranked against 177,133 productivity extensions
Findings
12
median 16Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
4
median 3Declared in manifest
Active users
3
median 14vs category median
Findings breakdown
Automated security signal · 12 distinct issues across 6 severities
12
distinct issues
detected
detected
Critical18%
High217%
Needs Review00%
Medium867%
Low18%
Info00%
Permissions requested
3 risky permissions of 4 total
3 high-risk permissions require attention
This extension requests 4 permissions in total. 3 of them grant broad capabilities that are worth a careful look.
High
Delete browsing data
Can remove browsing history, cookies, cache, and other browsing data
High
Access browsing history
Can read and modify your complete browsing history
High
View open tabs
Can see URLs and titles of all open tabs
Medium
Store local data
Can save data locally in the browser for persistence
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Scan performed by extenshi.io · Aug 18, 2026
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