SECURITY REPORT · EXTENSHI SCAN
Open in Sumatra PDF and DJVU Reader
Firefox extension·by Andy Portmen
0
/ 100 SAFETY SCORE
DANGEROUS
Meaningful risk surface. Avoid on managed devices without review.
Likely abandonedsafety score reduced by 30 points
- No update in over 6 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
Open in Sumatra PDF and DJVU Reader'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 Privacy & Security
6%of privacy & security extensions carry more risk
Riskier ←→ Safer
Ranked against 11,537 privacy & security extensions
Findings
18
median 5Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
7
median 4Declared in manifest
Active users
227
median 3vs category median
Findings breakdown
Automated security signal · 18 distinct issues across 6 severities
18
distinct issues
detected
detected
Critical16%
High633%
Needs Review00%
Medium1056%
Low16%
Info00%
Permissions requested
3 risky permissions of 7 total
2 critical permissions require attention
This extension requests 7 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
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Scan performed by extenshi.io · Aug 21, 2026
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