SECURITY REPORT · EXTENSHI SCAN
999 Cleaner
Firefox extension·by Михаил
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
999 Cleaner's safety score vs every other extension we've scanned
Globally
23%of extensions carry more risk
Riskier ←→ Safer
Ranked against 120,731 extensions
In Privacy & Security
16%of privacy & security extensions carry more risk
Riskier ←→ Safer
Ranked against 19,355 privacy & security extensions
Findings
9
median 4Lower is safer
Critical findings
2
median 0Severity = Critical
Permissions
3
median 3Declared in manifest
Active users
0
median 4vs category median
Findings breakdown
Automated security signal · 9 findings across 5 severities
9
findings
detected
detected
Critical222%
High00%
Medium778%
Low00%
Info00%
Permissions requested
3 permissions declared
No risky permissions
3 permissions requested — none are flagged as risky.
Medium
Store local data
Can save data locally in the browser for persistence
Info
https://999.md/*
No additional information available.
Info
https://www.999.md/*
No additional information available.
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Scan performed by extenshi.io · Jun 25, 2026
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