SECURITY REPORT · EXTENSHI SCAN
Vessel
Firefox extension·by monokrome
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
Vessel's safety score vs every other extension we've scanned
Globally
82.44%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
72.44%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
23
median 38Lower is safer
Risky permissions
5
median 1Critical + high perms
Total permissions
10
median 4All declared perms
Critical findings
1
median 2Severity = Critical
Findings breakdown
Automated security signal · 23 distinct issues across 6 severities
23
distinct issues
detected
detected
Critical14%
High00%
Needs Review00%
Medium2296%
Low00%
Info00%
Permissions requested
5 risky permissions of 10 total
1 critical permission require attention
This extension requests 10 permissions in total. 5 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
Access browser cookies
Can read and modify cookies, potentially accessing login sessions
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
Block and modify web requests
Can intercept, block, or modify any network request before it completes
Medium
Container tabs
Can manage Firefox container tabs and their identities
Medium
Custom menus
Can add custom items to the browser context menu
Medium
Access session data
Can query and restore recently closed tabs and windows
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Monitor navigation
Can observe and track tab navigation events and URL changes
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Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
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