SECURITY REPORT · EXTENSHI SCAN
MSJ Web Serial Management tool
Chrome extension·by Magellan Systems Japan, Inc.
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
MSJ Web Serial Management tool's safety score vs every other extension we've scanned
Globally
46%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Productivity
58%of productivity extensions carry more risk
Riskier ←→ Safer
Ranked against 177,133 productivity extensions
Findings
17
median 16Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
0
median 3Declared in manifest
Active users
189
median 14vs category median
Findings breakdown
Automated security signal · 17 distinct issues across 6 severities
17
distinct issues
detected
detected
Scanners reported 252 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical00%
High16%
Needs Review00%
Medium1376%
Low318%
Info00%
Permissions requested
0 permissions declared
No permissions requested
This extension doesn't request any browser permissions. That's unusually clean.
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Scan performed by extenshi.io · Aug 10, 2026
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