SECURITY REPORT · EXTENSHI SCAN
User Scripts Manager
Firefox extension·by X X
73
/ 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
User Scripts Manager's safety score vs every other extension we've scanned
Globally
19%of extensions carry more risk
Riskier ←→ Safer
Ranked against 383,513 extensions
In Web Development
10%of web development extensions carry more risk
Riskier ←→ Safer
Ranked against 14,854 web development extensions
Findings
190
median 4Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
3
median 3Declared in manifest
Active users
1
median 2vs category median
Findings breakdown
Automated security signal · 190 distinct issues across 6 severities
190
distinct issues
detected
detected
Scanners reported 210 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical11%
High11%
Needs Review00%
Medium10254%
Low8645%
Info00%
Permissions requested
2 risky permissions of 3 total
2 high-risk permissions require attention
This extension requests 3 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
User scripts(optional)
Can register and execute user scripts in web pages
Medium
Store local data
Can save data locally in the browser for persistence
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Scan performed by extenshi.io · Aug 24, 2026
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