SECURITY REPORT · EXTENSHI SCAN
Mobile Simulator Extension MSIM: Responsive Viewer
Firefox extension·by Mobile Simulator (MSIM)
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
Mobile Simulator Extension MSIM: Responsive Viewer's safety score vs every other extension we've scanned
Globally
42%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Appearance
15%of appearance extensions carry more risk
Riskier ←→ Safer
Ranked against 17,915 appearance extensions
Findings
11
median 3Lower is safer
Critical findings
2
median 0Severity = Critical
Permissions
3
median 2Declared in manifest
Active users
8
median 3vs category median
Findings breakdown
Automated security signal · 11 distinct issues across 6 severities
11
distinct issues
detected
detected
Critical218%
High218%
Needs Review00%
Medium545%
Low218%
Info00%
Permissions requested
1 risky permission of 3 total
1 high-risk permission require attention
This extension requests 3 permissions in total. 1 of them grant broad capabilities that are worth a careful look.
High
Execute scripts in pages
Can inject and execute JavaScript code in web pages
Medium
Access current tab
Can temporarily access the content of the active tab when you click the extension
Medium
Store local data
Can save data locally in the browser for persistence
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Scan performed by extenshi.io · Aug 18, 2026
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