SECURITY REPORT · EXTENSHI SCAN
Alt-Left Closes Empty Tab
Firefox extension·by dblanchard
0
/ 100 SAFETY SCORE
EXCELLENT
Looks clean. No meaningful risks detected in this scan.
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
Alt-Left Closes Empty Tab's safety score vs every other extension we've scanned
Globally
69%of extensions carry more risk
Riskier ←→ Safer
Ranked against 347,108 extensions
In Tabs
37%of tabs extensions carry more risk
Riskier ←→ Safer
Ranked against 10,055 tabs extensions
Findings
4
median 3Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
4
median 3Declared in manifest
Active users
0
median 3vs category median
Findings breakdown
Automated security signal · 4 distinct issues across 6 severities
4
distinct issues
detected
detected
Scanners reported 5 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical00%
High125%
Needs Review00%
Medium250%
Low125%
Info00%
Permissions requested
2 risky permissions of 4 total
1 critical permission require attention
This extension requests 4 permissions in total. 2 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
Medium
Access current tab
Can temporarily access the content of the active tab when you click the extension
Medium
Monitor navigation
Can observe and track tab navigation events and URL changes
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Scan performed by extenshi.io · Jul 25, 2026
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