SECURITY REPORT · EXTENSHI SCAN
404 Explorer
Firefox extension·by Hi Jon
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
404 Explorer's safety score vs every other extension we've scanned
Globally
24%of extensions carry more risk
Riskier ←→ Safer
Ranked against 120,711 extensions
In Other
10%of other extensions carry more risk
Riskier ←→ Safer
Ranked against 20,224 other extensions
Findings
7
median 3Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
3
median 3Declared in manifest
Active users
0
median 2vs category median
Findings breakdown
Automated security signal · 7 findings across 5 severities
7
findings
detected
detected
Critical114%
High229%
Medium343%
Low114%
Info00%
Permissions requested
3 risky permissions of 3 total
1 critical permission require attention
This extension requests 3 permissions in total. 3 of them grant broad capabilities that are worth a careful look.
Critical
Access to all websites
Can read and modify content on every website you visit
High
Observe web requests
Can monitor all network requests made by the browser
High
Block and modify web requests
Can intercept, block, or modify any network request before it completes
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Scan performed by extenshi.io · Jun 25, 2026
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