SECURITY REPORT · EXTENSHI SCAN
Tab Collections Manager
Firefox extension·by Mastacheata
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
Tab Collections Manager's safety score vs every other extension we've scanned
Globally
34%of extensions carry more risk
Riskier ←→ Safer
Ranked against 368,615 extensions
In Appearance
9%of appearance extensions carry more risk
Riskier ←→ Safer
Ranked against 17,698 appearance extensions
Findings
21
median 3Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
6
median 2Declared in manifest
Active users
1
median 3vs category median
Findings breakdown
Automated security signal · 21 distinct issues across 6 severities
21
distinct issues
detected
detected
Critical00%
High210%
Needs Review00%
Medium1781%
Low210%
Info00%
Permissions requested
2 risky permissions of 6 total
2 high-risk permissions require attention
This extension requests 6 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
Access browser cookies
Can read and modify cookies, potentially accessing login sessions
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Container tabs
Can manage Firefox container tabs and their identities
Low
Hide tabs
Can hide or show browser tabs
Low
Manage tab groups
Can create and manage tab groups
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Scan performed by extenshi.io · Aug 24, 2026
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