SECURITY REPORT · EXTENSHI SCAN
Youtube Thumbnail Tester
Chrome extension·by 99rabbits.com
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
Youtube Thumbnail Tester's safety score vs every other extension we've scanned
Globally
19%of extensions carry more risk
Riskier ←→ Safer
Ranked against 120,731 extensions
In Productivity
40%of productivity extensions carry more risk
Riskier ←→ Safer
Ranked against 25,973 productivity extensions
Findings
17
median 10Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
4
median 3Declared in manifest
Active users
71
median 23vs category median
Findings breakdown
Automated security signal · 17 findings across 5 severities
17
findings
detected
detected
Critical16%
High00%
Medium1694%
Low00%
Info00%
Permissions requested
1 risky permission of 4 total
1 high-risk permission require attention
This extension requests 4 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
Unlimited local storage
Can store large amounts of data locally without size limits
Medium
Access current tab
Can temporarily access the content of the active tab when you click the extension
Are you the author of Youtube Thumbnail Tester?
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Scan performed by extenshi.io · Jun 25, 2026
Browser extensions made transparent.