extenshi.io
SECURITY REPORT · EXTENSHI SCAN

Usable Browser Agent (free)

Firefox extension·by STS Ky
60
/ 100 SAFETY SCORE
RISKY
Several elevated signals. Read the findings before sharing this with your team.

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

Usable Browser Agent (free)'s safety score vs every other extension we've scanned
Globally
5%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 402,632 extensions
In Web Development
2%of web development extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 15,275 web development extensions
Findings
36
median 4Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
12
median 3Declared in manifest
Active users
2
median 2vs category median

Findings breakdown

Automated security signal · 36 distinct issues across 6 severities
36
distinct issues
detected

Permissions requested

7 risky permissions of 12 total
1 critical permission require attention
This extension requests 12 permissions in total. 7 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
Execute scripts in pages

Can inject and execute JavaScript code in web pages

High
Manage downloads

Can initiate downloads and access your download history

High
Observe web requests

Can monitor all network requests made by the browser

Medium
Access current tab

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

Medium
Monitor navigation

Can observe and track tab navigation events and URL changes

Medium
Read clipboard

Can read text and data currently on your clipboard

Medium
Write to clipboard

Can place content onto your clipboard

Medium
Show notifications

Can display desktop notifications outside the browser

Are you the author of Usable Browser Agent (free)?

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 Usable Browser Agent (free)'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/415310)](https://catalog.extenshi.io/extensions/415310/security)
HTML
<a href="https://catalog.extenshi.io/extensions/415310/security"><img src="https://catalog.extenshi.io/api/badge/415310" alt="Extenshi security score" /></a>

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

Scan performed by extenshi.io · Sep 6, 2026
Browser extensions made transparent.