SECURITY REPORT · EXTENSHI SCAN
Fast-Simple Calculator
Firefox extension·by Luhut Andreas
38
/ 100 SAFETY SCORE
DANGEROUS
Meaningful risk surface. Avoid on managed devices without review.
Likely abandonedsafety score reduced by 30 points
- No update in over 6 years
Why this matters
An unmaintained extension keeps whatever flaws it shipped with, and a listing with users but no owner is an attractive target to buy and repurpose.
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
Fast-Simple Calculator's safety score vs every other extension we've scanned
Globally
12%of extensions carry more risk
Riskier ←→ Safer
Ranked against 402,636 extensions
In Alerts & Updates
4%of alerts & updates extensions carry more risk
Riskier ←→ Safer
Ranked against 7,095 alerts & updates extensions
Findings
17
median 4Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
1
median 3Declared in manifest
Active users
6
median 1vs category median
Findings breakdown
Automated security signal · 17 distinct issues across 6 severities
17
distinct issues
detected
detected
Critical16%
High1271%
Needs Review00%
Medium318%
Low16%
Info00%
Permissions requested
1 permission declared
No risky permissions
1 permission requested — none are flagged as risky.
Medium
Store local data
Can save data locally in the browser for persistence
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Scan performed by extenshi.io · Aug 6, 2026
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