SECURITY REPORT · EXTENSHI SCAN
Data Size Lab
Firefox extension·by Chris Grundy
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
Data Size Lab's safety score vs every other extension we've scanned
Globally
51%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Other
21%of other extensions carry more risk
Riskier ←→ Safer
Ranked against 26,888 other extensions
Findings
17
median 3Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
1
median 3Declared in manifest
Active users
0
median 2vs category median
Findings breakdown
Automated security signal · 17 distinct issues across 6 severities
17
distinct issues
detected
detected
Critical00%
High00%
Needs Review00%
Medium1694%
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 3, 2026
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