SECURITY REPORT · EXTENSHI SCAN
Tab Manager JJM
Firefox extension·by Double J & M
0
/ 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 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
Tab Manager JJM's safety score vs every other extension we've scanned
Globally
28%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Tabs
10%of tabs extensions carry more risk
Riskier ←→ Safer
Ranked against 11,722 tabs extensions
Findings
13
median 4Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
7
median 3Declared in manifest
Active users
1
median 3vs category median
Findings breakdown
Automated security signal · 13 distinct issues across 6 severities
13
distinct issues
detected
detected
Critical18%
High215%
Needs Review00%
Medium969%
Low18%
Info00%
Permissions requested
3 risky permissions of 7 total
1 critical permission require attention
This extension requests 7 permissions in total. 3 of them grant broad capabilities that are worth a careful look.
Critical
Access to all websites
Can read and modify content on every website you visit
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
Access current tab
Can temporarily access the content of the active tab when you click the extension
Medium
Add context menu items
Can add custom items to the right-click context menu
Medium
Container tabs
Can manage Firefox container tabs and their identities
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Scan performed by extenshi.io · Aug 24, 2026
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