SECURITY REPORT · EXTENSHI SCAN
JavaScript Playground ⚡ Online JS Compiler
Firefox extension·by onyxwizard
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
JavaScript Playground ⚡ Online JS Compiler's safety score vs every other extension we've scanned
Globally
79.01%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
69.01%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
12
median 38Lower is safer
Risky permissions
1
median 1Critical + high perms
Total permissions
2
median 4All declared perms
Critical findings
9
median 2Severity = Critical
Findings breakdown
Automated security signal · 12 findings across 5 severities
12
findings
detected
detected
Critical975%
High217%
Medium18%
Low00%
Info00%
Permissions requested
1 risky permission of 2 total
1 high-risk permission require attention
This extension requests 2 permissions in total. 1 of them grant broad capabilities that are worth a careful look.
High
View open tabs
Can see URLs and titles of all open tabs
Medium
Store local data
Can save data locally in the browser for persistence
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Scan performed by extenshi.io · Jun 25, 2026· partial run (some scanners failed)
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