extenshi.io
SECURITY REPORT · EXTENSHI SCAN

YouTube™ dual subtitles

Firefox extension·by Dublicator
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™ dual subtitles's safety score vs every other extension we've scanned
Globally
25%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 409,539 extensions
In Language Support
16%of language support extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 4,529 language support extensions
Findings
18
median 5Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
10
median 3Declared in manifest
Active users
2475
median 3vs category median

Findings breakdown

Automated security signal · 18 distinct issues across 6 severities
18
distinct issues
detected
Scanners reported 23 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.

Permissions requested

10 permissions declared
No risky permissions
10 permissions requested — none are flagged as risky.
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

Low
React to page content

Can show or hide the extension icon based on page content rules

Low
Manage fonts

Can read and modify browser font settings

Info
https://www.youtube.com/

No additional information available.

Info
https://www.youtube-nocookie.com/

No additional information available.

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

No additional information available.

Info
https://www.youtube-nocookie.com/embed/*

No additional information available.

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Scan performed by extenshi.io · Aug 25, 2026
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