SECURITY REPORT · EXTENSHI SCAN
TST Focus Preceding Tab On Close
Firefox extension·by Firefox user 13934280
0
/ 100 SAFETY SCORE
CAUTION
Mostly fine, but a few things worth reviewing before you install.
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
TST Focus Preceding Tab On Close's safety score vs every other extension we've scanned
Globally
84%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Tabs
69%of tabs extensions carry more risk
Riskier ←→ Safer
Ranked against 11,722 tabs extensions
Findings
2
median 4Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
0
median 3Declared in manifest
Active users
87
median 3vs category median
Findings breakdown
Automated security signal · 2 distinct issues across 6 severities
2
distinct issues
detected
detected
Critical00%
High00%
Needs Review00%
Medium150%
Low150%
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 24, 2026
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