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SECURITY REPORT · EXTENSHI SCAN

YouTube Video Player Preview

Firefox extension·by Baris Derin
75
/ 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

YouTube Video Player Preview's safety score vs every other extension we've scanned
Globally
75.37%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked across every extension we scan
In its category
65.37%of its category extensions carry more risk
This extension
Riskier ←→ Safer
Ranked within its category
Findings
15
median 38Lower is safer
Risky permissions
7
median 1Critical + high perms
Total permissions
11
median 4All declared perms
Critical findings
2
median 2Severity = Critical

Findings breakdown

Automated security signal · 15 distinct issues across 6 severities
15
distinct issues
detected
Scanners reported 18 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.

Permissions requested

7 risky permissions of 11 total
2 critical permissions require attention
This extension requests 11 permissions in total. 7 of them grant broad capabilities that are worth a careful look.
Critical
Manage other extensions

Can enable, disable, or uninstall other browser extensions

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
Manage downloads

Can initiate downloads and access your download history

High
Access browser cookies

Can read and modify cookies, potentially accessing login sessions

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

Medium
Add context menu items

Can add custom items to the right-click context menu

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

No additional information available.

Info
*://*.barisderin.com/*

No additional information available.

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