SECURITY REPORT · EXTENSHI SCAN
AO3 Reading Companion
Firefox extension·by Disastrous-Class
84
/ 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
AO3 Reading Companion's safety score vs every other extension we've scanned
Globally
49%of extensions carry more risk
Riskier ←→ Safer
Ranked against 376,643 extensions
In Search Tools
24%of search tools extensions carry more risk
Riskier ←→ Safer
Ranked against 15,723 search tools extensions
Findings
146
median 4Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
3
median 3Declared in manifest
Active users
9
median 2vs category median
Findings breakdown
Automated security signal · 146 distinct issues across 6 severities
146
distinct issues
detected
detected
Critical00%
High00%
Needs Review00%
Medium14499%
Low21%
Info00%
Permissions requested
3 permissions declared
No risky permissions
3 permissions requested — none are flagged as risky.
Medium
Store local data
Can save data locally in the browser for persistence
Low
Schedule tasks
Can schedule periodic background tasks
Info
https://archiveofourown.org/*
No additional information available.
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Scan performed by extenshi.io · Aug 26, 2026
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