SECURITY REPORT · EXTENSHI SCAN
Client Challenge
Firefox extension·by MSTC e-COMMERCE
43
/ 100 SAFETY SCORE
RISKY
Several elevated signals. Read the findings before sharing this with your team.
Likely abandonedsafety score reduced by 30 points
- No update in over 7 years
Why this matters
An unmaintained extension keeps whatever flaws it shipped with, and a listing with users but no owner is an attractive target to buy and repurpose.
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
Client Challenge's safety score vs every other extension we've scanned
Globally
19%of extensions carry more risk
Riskier ←→ Safer
Ranked against 415,831 extensions
In Privacy & Security
16%of privacy & security extensions carry more risk
Riskier ←→ Safer
Ranked against 12,618 privacy & security extensions
Findings
8
median 9Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
5
median 4Declared in manifest
Active users
40
median 3vs category median
Findings breakdown
Automated security signal · 8 distinct issues across 6 severities
8
distinct issues
detected
detected
Scanners reported 9 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical113%
High225%
Needs Review00%
Medium225%
Low338%
Info00%
Permissions requested
1 risky permission of 5 total
1 critical permission require attention
This extension requests 5 permissions in total. 1 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
Info
http://www.mstcecommerce.com/*
No additional information available.
Info
https://www.mstcecommerce.com/*
No additional information available.
Info
http://www.mstcauction.com/*
No additional information available.
Info
https://www.mstcauction.com/*
No additional information available.
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Scan performed by extenshi.io · Aug 18, 2026
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