SECURITY REPORT · EXTENSHI SCAN
Open PDF in Default PDF Reader (Instead of FF)
Firefox extension·by Keven Lee
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
Open PDF in Default PDF Reader (Instead of FF)'s safety score vs every other extension we've scanned
Globally
9%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Appearance
2%of appearance extensions carry more risk
Riskier ←→ Safer
Ranked against 17,915 appearance extensions
Findings
22
median 3Lower is safer
Critical findings
3
median 0Severity = Critical
Permissions
9
median 2Declared in manifest
Active users
277
median 3vs category median
Findings breakdown
Automated security signal · 22 distinct issues across 6 severities
22
distinct issues
detected
detected
Critical314%
High836%
Needs Review00%
Medium1045%
Low15%
Info00%
Permissions requested
3 risky permissions of 9 total
2 critical permissions require attention
This extension requests 9 permissions in total. 3 of them grant broad capabilities that are worth a careful look.
Critical
Communicate with desktop apps
Can exchange messages with applications installed on your computer
Critical
Access to all websites
Can read and modify content on every website you visit
High
Manage downloads
Can initiate downloads and access your download history
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Add context menu items
Can add custom items to the right-click context menu
Medium
Show notifications
Can display desktop notifications outside the browser
Medium
Access current tab
Can temporarily access the content of the active tab when you click the extension
Low
Schedule tasks
Can schedule periodic background tasks
Low
Block network requests (declarative)
Can block or redirect network requests using predefined rules without seeing content
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Scan performed by extenshi.io · Aug 21, 2026
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