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SECURITY REPORT · EXTENSHI SCAN

Is Client Challenge safe?

Checked version: 5.4.0 · Scan date (UTC): 2026-08-25

Firefox extension·by SerhiiMaksymiv
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

Client Challenge's safety score vs every other extension we've scanned
Globally
39%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 429,470 extensions
In Web Development
39%of web development extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 15,517 web development extensions
Findings
13
median 9Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
18
median 3Declared in manifest
Active users
0
median 3vs category median

Findings breakdown

Automated security signal · 13 distinct issues across 6 severities
13
distinct issues
detected

Permissions requested

5 risky permissions of 18 total
1 critical permission require attention
This extension requests 18 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
Execute scripts in pages

Can inject and execute JavaScript code in web pages

High
Control privacy settings

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

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

Medium
Access current tab

Can temporarily access the content of the active tab when you click the extension

Medium
Browser settings

Can read and modify browser-wide settings

Medium
Container tabs

Can manage Firefox container tabs and their identities

Medium
Store local data

Can save data locally in the browser for persistence

Medium
Unlimited local storage

Can store large amounts of data locally without size limits

Medium
Access session data

Can query and restore recently closed tabs and windows

Medium
Custom menus

Can add custom items to the browser context menu

Medium
Override context menu

Can override the default context menu behavior

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Scan performed by extenshi.io · Oct 22, 2026
Browser extensions made transparent.

What this assessment covers

Store listing
Firefox
Checked version
5.4.0
Current listed version
5.4.0
Scan date (UTC)
Assessment status
Completed

Recorded findings: 1 critical and 3 high severity. Read the finding details before interpreting the score; automated flags are not proof of malicious behaviour.

Automated analysis looks for suspicious code, permissions and other risk signals. It does not observe every runtime behaviour or independently audit the publisher’s servers. A low-risk result is not a guarantee of safety. How our checks work.

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