SECURITY REPORT · EXTENSHI SCAN
Prevent New Tabs — Per-Site Popup Blocker
Firefox extension·by Prevent New Page
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
Prevent New Tabs — Per-Site Popup Blocker's safety score vs every other extension we've scanned
Globally
24%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Tabs
9%of tabs extensions carry more risk
Riskier ←→ Safer
Ranked against 11,722 tabs extensions
Findings
16
median 4Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
6
median 3Declared in manifest
Active users
1
median 3vs category median
Findings breakdown
Automated security signal · 16 distinct issues across 6 severities
16
distinct issues
detected
detected
Critical16%
High16%
Needs Review00%
Medium1275%
Low213%
Info00%
Permissions requested
2 risky permissions of 6 total
1 critical permission require attention
This extension requests 6 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
Monitor navigation
Can observe and track tab navigation events and URL changes
Medium
Store local data
Can save data locally in the browser for persistence
Low
Schedule tasks
Can schedule periodic background tasks
Info
https://api.keygen.sh/*
No additional information available.
Are you the author of Prevent New Tabs — Per-Site Popup Blocker?
Claim this extension to respond to findings, add context, and earn a verified badge on extenshi.io.
Add the badge to your README
Show Prevent New Tabs — Per-Site Popup Blocker's live security score on GitHub or in your docs
Scan performed by extenshi.io · Aug 24, 2026
Browser extensions made transparent.