SECURITY REPORT · EXTENSHI SCAN
File System Access
Firefox extension·by sycxyc
75
/ 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
File System Access's safety score vs every other extension we've scanned
Globally
14%of extensions carry more risk
Riskier ←→ Safer
Ranked against 415,874 extensions
In Web Development
10%of web development extensions carry more risk
Riskier ←→ Safer
Ranked against 15,408 web development extensions
Findings
28
median 9Lower is safer
Critical findings
3
median 0Severity = Critical
Permissions
4
median 3Declared in manifest
Active users
204
median 3vs category median
Findings breakdown
Automated security signal · 28 distinct issues across 6 severities
28
distinct issues
detected
detected
Critical311%
High14%
Needs Review00%
Medium1968%
Low518%
Info00%
Permissions requested
2 risky permissions of 4 total
2 critical permissions require attention
This extension requests 4 permissions in total. 2 of them grant broad capabilities that are worth a careful look.
Critical
Communicate with desktop apps
Can exchange messages with applications installed on your computer
Critical
Access to all websites
Can read and modify content on every website you visit
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
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Scan performed by extenshi.io · Oct 22, 2026
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