SECURITY REPORT · EXTENSHI SCAN
Castorus
Firefox extension·by Castorus
0
/ 100 SAFETY SCORE
EXCELLENT
Looks clean. No meaningful risks detected in this scan.
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
Castorus's safety score vs every other extension we've scanned
Globally
85.46000000000001%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
75.46000000000001%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
15
median 38Lower is safer
Risky permissions
5
median 1Critical + high perms
Total permissions
7
median 4All declared perms
Critical findings
0
median 2Severity = Critical
Findings breakdown
Automated security signal · 15 distinct issues across 6 severities
15
distinct issues
detected
detected
Critical00%
High00%
Needs Review00%
Medium640%
Low960%
Info00%
Permissions requested
5 risky permissions of 7 total
2 critical permissions require attention
This extension requests 7 permissions in total. 5 of them grant broad capabilities that are worth a careful look.
Critical
Manage other extensions
Can enable, disable, or uninstall other browser extensions
Critical
Access to all websites
Can read and modify content on every website you visit
High
View open tabs
Can see URLs and titles of all open tabs
High
Observe web requests
Can monitor all network requests made by the browser
High
Execute scripts in pages
Can inject and execute JavaScript code in web pages
Medium
Store local data
Can save data locally in the browser for persistence
Low
Schedule tasks
Can schedule periodic background tasks
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Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
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