SECURITY REPORT · EXTENSHI SCAN
Containerise
Firefox extension·by kintesh
0
/ 100 SAFETY SCORE
RISKY
Several elevated signals. Read the findings before sharing this with your team.
Likely abandonedsafety score reduced by 30 points
- No update in over 5 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
Containerise's safety score vs every other extension we've scanned
Globally
23%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Privacy & Security
17%of privacy & security extensions carry more risk
Riskier ←→ Safer
Ranked against 11,537 privacy & security extensions
Findings
16
median 5Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
7
median 4Declared in manifest
Active users
1798
median 3vs category median
Findings breakdown
Automated security signal · 16 distinct issues across 6 severities
16
distinct issues
detected
detected
Scanners reported 24 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical16%
High425%
Needs Review00%
Medium956%
Low16%
Info16%
Permissions requested
5 risky permissions of 7 total
1 critical permission require attention
This extension requests 7 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
Store local data
Can save data locally in the browser for persistence
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Scan performed by extenshi.io · Aug 1, 2026
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