extenshi.io
SECURITY REPORT · EXTENSHI SCAN

YouTube Design Preserver

Firefox extension·by GuyXY
48
/ 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 6 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

YouTube Design Preserver's safety score vs every other extension we've scanned
Globally
34%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 402,581 extensions
In Photos Music Videos
17%of photos music videos extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 11,114 photos music videos extensions
Findings
13
median 4Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
6
median 3Declared in manifest
Active users
79
median 6vs category median

Findings breakdown

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

Permissions requested

3 risky permissions of 6 total
3 high-risk permissions require attention
This extension requests 6 permissions in total. 3 of them grant broad capabilities that are worth a careful look.
High
Access browser cookies

Can read and modify cookies, potentially accessing login sessions

High
Block and modify web requests

Can intercept, block, or modify any network request before it completes

High
Observe web requests

Can monitor all network requests made by the browser

Medium
Store local data

Can save data locally in the browser for persistence

Info
*://youtube.com/*

No additional information available.

Info
*://www.youtube.com/*

No additional information available.

Are you the author of YouTube Design Preserver?

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 YouTube Design Preserver'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/126126)](https://catalog.extenshi.io/extensions/126126/security)
HTML
<a href="https://catalog.extenshi.io/extensions/126126/security"><img src="https://catalog.extenshi.io/api/badge/126126" alt="Extenshi security score" /></a>

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

Scan performed by extenshi.io · Aug 25, 2026
Browser extensions made transparent.