extenshi.io
SECURITY REPORT · EXTENSHI SCAN

Container Tab Groups

Firefox extension·by Menhera.org
88
/ 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

Container Tab Groups's safety score vs every other extension we've scanned
Globally
88.31%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked across every extension we scan
In its category
78.31%of its category extensions carry more risk
This extension
Riskier ←→ Safer
Ranked within its category
Findings
16
median 38Lower is safer
Risky permissions
9
median 1Critical + high perms
Total permissions
18
median 4All declared perms
Critical findings
0
median 2Severity = Critical

Findings breakdown

Automated security signal · 16 distinct issues across 6 severities
16
distinct issues
detected
Scanners reported 22 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.

Permissions requested

9 risky permissions of 18 total
1 critical permission require attention
This extension requests 18 permissions in total. 9 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
View open tabs

Can see URLs and titles of all open tabs

High
Access browser cookies

Can read and modify cookies, potentially accessing login sessions

High
Control privacy settings

Can modify browser privacy settings like Do Not Track and safe browsing

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
Override context menu

Can override the default context menu behavior

Medium
Store local data

Can save data locally in the browser for persistence

Medium
Browser settings

Can read and modify browser-wide settings

Medium
Access session data

Can query and restore recently closed tabs and windows

Low
Hide tabs

Can hide or show browser tabs

Low
Customize theme

Can change the browser theme appearance

Are you the author of Container Tab Groups?

Claim this extension to respond to findings, add context, and earn a verified badge on extenshi.io.

Claim this extension

Add the badge to your README

Show Container Tab Groups's live security score on GitHub or in your docs
Extenshi security score badge preview
Markdown
[![Extenshi security score](https://catalog.extenshi.io/api/badge/12450)](https://catalog.extenshi.io/extensions/12450/security)
HTML
<a href="https://catalog.extenshi.io/extensions/12450/security"><img src="https://catalog.extenshi.io/api/badge/12450" alt="Extenshi security score" /></a>

The badge always shows the current score — it updates automatically after every scan.

Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
Browser extensions made transparent.