extenshi.io
SECURITY REPORT · EXTENSHI SCAN

UniversalVideoDownloader

Firefox extension·by John
74
/ 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

UniversalVideoDownloader's safety score vs every other extension we've scanned
Globally
22%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 383,513 extensions
In Photos Music Videos
9%of photos music videos extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 10,695 photos music videos extensions
Findings
10
median 4Lower is safer
Critical findings
2
median 0Severity = Critical
Permissions
4
median 3Declared in manifest
Active users
7
median 6vs category median

Findings breakdown

Automated security signal · 10 distinct issues across 6 severities
10
distinct issues
detected

Permissions requested

2 risky permissions of 4 total
2 critical permissions require attention
This extension requests 4 permissions in total. 2 of them grant broad capabilities that are worth a careful look.
Critical
Communicate with desktop apps

Can exchange messages with applications installed on your computer

Critical
Access to all websites

Can read and modify content on every website you visit

Medium
Add context menu items

Can add custom items to the right-click context menu

Medium
Show notifications

Can display desktop notifications outside the browser

Are you the author of UniversalVideoDownloader?

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 UniversalVideoDownloader'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/404049)](https://catalog.extenshi.io/extensions/404049/security)
HTML
<a href="https://catalog.extenshi.io/extensions/404049/security"><img src="https://catalog.extenshi.io/api/badge/404049" alt="Extenshi security score" /></a>

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

Scan performed by extenshi.io · Aug 24, 2026
Browser extensions made transparent.