DuSubs: Dual Language Subs

Name: DuSubs: Dual Language Subs
Author: Finn

Dual subtitles for YouTube and Bilibili with support for language learning features such as pinyin, furigana, and hovering for definitions. Export words to anki or use www.dusubs.com to practice freely

Download

Install

Features & Capabilities

Dual subtitles on YouTube and Bilibili - show any two tracks at once Optionally enable Pinyin for Chinese characters or Furigana for Japanese while you watch

Hover any word to read its English definition or to save it to a study list Export saved words to Anki, Quizlet, or use the companion site dusubs.com Adjustable font size, position, colour, stroke, shadow, and background per track

User Growth & Download Statistics

Add-on

By:

Finn

Daily users:

Version:

1.2.3 Last updated: 2026-06-23

Version code:

6320665

Creation date:

2026-06-13

Risk:

Permissions:

activeTab
tabs
storage
webRequest
https://www.dusubs.com/*
https://dusubs.com/*
*://*.youtube.com/*
*://*.bilibili.com/*
*://*.bilivideo.com/*

Content scripts matches:

www.youtube.com
m.youtube.com
www.bilibili.com
www.dusubs.com
dusubs.com

Size:

19.69MB

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-14

Compare stats and ranking:

Ranking

# 63,448 ▼ 273

Other rankings

#27 in quizlet keyword 24 ▼ 1#186 in language keyword 46 #211 in definition keyword 25 ▼ 3

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Finn

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/dusubs/

Permission Change History

2026-06-18: Version 1.1.1 → 1.2.0

Add Permissions: https://dusubs.com/*

Is DuSubs: Dual Language Subs Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

DuSubs: Dual Language Subs requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

DuSubs: Dual Language Subs is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
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