SECURITY REPORT · EXTENSHI SCAN
Substack Insights
Firefox extension·by Mona Mona
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
Substack Insights's safety score vs every other extension we've scanned
Globally
79.75%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
69.75%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
7
median 38Lower is safer
Risky permissions
2
median 1Critical + high perms
Total permissions
3
median 4All declared perms
Critical findings
1
median 2Severity = Critical
Findings breakdown
Automated security signal · 7 findings across 5 severities
7
findings
detected
detected
Critical114%
High229%
Medium343%
Low114%
Info00%
Permissions requested
2 risky permissions of 3 total
2 high-risk permissions require attention
This extension requests 3 permissions in total. 2 of them grant broad capabilities that are worth a careful look.
High
Access browser cookies
Can read and modify cookies, potentially accessing login sessions
High
Manage downloads
Can initiate downloads and access your download history
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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