SECURITY REPORT · EXTENSHI SCAN
ClutterZero — Ad & Cookie Shield
Firefox extension·by ClutterZero
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
ClutterZero — Ad & Cookie Shield's safety score vs every other extension we've scanned
Globally
10%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Other
3%of other extensions carry more risk
Riskier ←→ Safer
Ranked against 26,888 other extensions
Findings
33
median 3Lower is safer
Critical findings
2
median 0Severity = Critical
Permissions
8
median 3Declared in manifest
Active users
0
median 2vs category median
Findings breakdown
Automated security signal · 33 distinct issues across 6 severities
33
distinct issues
detected
detected
Critical26%
High515%
Needs Review00%
Medium2370%
Low39%
Info00%
Permissions requested
3 risky permissions of 8 total
1 critical permission require attention
This extension requests 8 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
Access browser cookies
Can read and modify cookies, potentially accessing login sessions
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Monitor navigation
Can observe and track tab navigation events and URL changes
Low
Schedule tasks
Can schedule periodic background tasks
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 9, 2026
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