SECURITY REPORT · EXTENSHI SCAN
CloseBuy
Firefox extension·by CloseBuy
0
/ 100 SAFETY SCORE
DANGEROUS
Meaningful risk surface. Avoid on managed devices without review.
Likely abandonedsafety score reduced by 30 points
- No update in over 5 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
CloseBuy's safety score vs every other extension we've scanned
Globally
2%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Shopping
1%of shopping extensions carry more risk
Riskier ←→ Safer
Ranked against 4,067 shopping extensions
Findings
72
median 6Lower is safer
Critical findings
2
median 0Severity = Critical
Permissions
9
median 4Declared in manifest
Active users
0
median 3vs category median
Findings breakdown
Automated security signal · 72 distinct issues across 6 severities
72
distinct issues
detected
detected
Scanners reported 86 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical23%
High1622%
Needs Review00%
Medium4360%
Low811%
Info34%
Permissions requested
3 risky permissions of 9 total
3 high-risk permissions require attention
This extension requests 9 permissions in total. 3 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
Access all HTTP sites
Can read and modify content on all non-encrypted websites
High
Access all HTTPS sites
Can read and modify content on all encrypted websites
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
Medium
Monitor navigation
Can observe and track tab navigation events and URL changes
Medium
Unlimited local storage
Can store large amounts of data locally without size limits
Info
http://*.amazon.com/*
No additional information available.
Info
https://*.amazon.com/*
No additional information available.
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Scan performed by extenshi.io · Aug 1, 2026
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