SECURITY REPORT · EXTENSHI SCAN
Duo Explained
Firefox extension·by Diogo Correia
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
Duo Explained's safety score vs every other extension we've scanned
Globally
67.64%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
57.64%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
34
median 38Lower is safer
Risky permissions
1
median 1Critical + high perms
Total permissions
7
median 4All declared perms
Critical findings
22
median 2Severity = Critical
Findings breakdown
Automated security signal · 34 findings across 5 severities
34
findings
detected
detected
Critical2265%
High00%
Medium926%
Low26%
Info13%
Permissions requested
1 risky permission of 7 total
1 high-risk permission require attention
This extension requests 7 permissions in total. 1 of them grant broad capabilities that are worth a careful look.
High
Execute scripts in pages
Can inject and execute JavaScript code in web pages
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Read clipboard
Can read text and data currently on your clipboard
Medium
Monitor navigation
Can observe and track tab navigation events and URL changes
Info
https://duolingo.com/*
No additional information available.
Info
https://www.duolingo.com/*
No additional information available.
Info
https://preview.duolingo.com/*
No additional information available.
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Scan performed by extenshi.io · Jun 25, 2026· partial run (some scanners failed)
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