SECURITY REPORT · EXTENSHI SCAN
Upside-down web
Firefox extension·by flweb
0
/ 100 SAFETY SCORE
CAUTION
Mostly fine, but a few things worth reviewing before you install.
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
Upside-down web's safety score vs every other extension we've scanned
Globally
84%of extensions carry more risk
Riskier ←→ Safer
Ranked against 368,615 extensions
In Games Entertainment
66%of games entertainment extensions carry more risk
Riskier ←→ Safer
Ranked against 8,598 games entertainment extensions
Findings
2
median 4Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
1
median 3Declared in manifest
Active users
1
median 4vs category median
Findings breakdown
Automated security signal · 2 distinct issues across 6 severities
2
distinct issues
detected
detected
Critical00%
High00%
Needs Review00%
Medium150%
Low150%
Info00%
Permissions requested
1 permission declared
No risky permissions
1 permission requested — none are flagged as risky.
Info
*://*/*
No additional information available.
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Scan performed by extenshi.io · Aug 24, 2026
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