SECURITY REPORT · EXTENSHI SCAN
Cross-Origin Storage
Firefox extension·by Thomas Steiner
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
Cross-Origin Storage's safety score vs every other extension we've scanned
Globally
13%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Web Development
6%of web development extensions carry more risk
Riskier ←→ Safer
Ranked against 14,329 web development extensions
Findings
57
median 4Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
7
median 3Declared in manifest
Active users
1
median 3vs category median
Findings breakdown
Automated security signal · 57 distinct issues across 6 severities
57
distinct issues
detected
detected
Critical00%
High47%
Needs Review00%
Medium4274%
Low1119%
Info00%
Permissions requested
2 risky permissions of 7 total
2 high-risk permissions require attention
This extension requests 7 permissions in total. 2 of them grant broad capabilities that are worth a careful look.
High
View open tabs
Can see URLs and titles of all open tabs
High
Access all HTTPS sites
Can read and modify content on all encrypted websites
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Unlimited local storage
Can store large amounts of data locally without size limits
Info
http://localhost/*
No additional information available.
Info
http://*.test/*
No additional information available.
Info
http://*.a.test/*
No additional information available.
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Scan performed by extenshi.io · Aug 3, 2026
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