Dualsub - Dual Subtitles for YouTube

Display dual subtitles, use machine translation and speech recognition to generate subtitles.

Dualsub - Dual Subtitles for YouTube Add-on

"Dualsub - Dual Subtitles for YouTube" is a browser add-on that enables users to display dual subtitles on YouTube videos. It utilizes machine translation and speech recognition to generate subtitles, supporting a range of platforms including YouTube, Bilibili, Coursera, and Udemy. Compatible with desktop browsers like Chrome, Edge, and Firefox, as well as mobile browsers such as Firefox (Android) and Orion (iOS), Dualsub enhances accessibility and understanding for multilingual viewers.

Add-on stats

Users: 4,988
91
Version: 2.55.4 (Last updated: 2025-01-12)
Creation date: 2018-10-03
Weekly download count: 158
Firefox on Android: Yes
Risk impact: High risk impact
Risk likelihood:
Manifest version: 3
Permissions:
  • storage
Host permissions:
  • https://api.dualsub.xyz/*
Size: 37.63K
URLs: Website

Other platforms

Dualsub - Dual Subtitles for YouTube (v2.55.4)
3.65 (429) 100,000
Not available on Android
Dualsub - Dual Subtitles for YouTube (v2.55.4)
4.20 (40) 42,423
Want to check extension ranking and stats more quickly for other Firefox add-ons? Install Chrome-Stats extension to view Firefox-Stats data as you browse the Firefox Browser Add-ons.

Add-on summary

Use Dualsub to display dual subtitles on YouTube.

Feature Description

Supported browsers:

  • Supports desktop browsers: Chrome, Edge, Firefox.
  • Supports mobile browsers: Firefox (Android), Orion (iOS).

Supported video websites:

  • Supports YouTube, including mobile version.
  • Supports Bilibili, Coursera, and Udemy, totaling over 10 video websites.

For more information, please visit <https://www.dualsub.xyz/>.

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Useful for language learning
  • Works well with mobile YouTube
  • Remembers language settings between videos
  • Automatically activates subtitles for videos
  • Can leverage multiple languages for learning
Cons
  • Recent updates have made it harder to toggle subtitle visibility
  • Native subtitle support is inconsistent
  • Translation for certain languages sometimes fails
  • Users experience issues with server response
  • The need to manually set language for each video on mobile
Most mentioned
  • Issues with the latest update affecting functionality
  • Useful for learning languages
  • Problems with translating specific languages
  • Automatic subtitle display preference
  • Problems with native subtitles not working as expected
User reviews
The latest update has ruined this extension. You can no longer switch styles from the settings and there is no way to toggle the visibility of the subs now. It used to be as simple as turning off captions off, now you have to disable the extension to do this. Used to be my favorite tool. Alas.
by Prince, 2025-01-16

Native subtitle no longer works, hope it can be fixed soon, love this extension <3
by ahaste, 2025-01-12

by osobaer, 2024-12-21
View all user reviews

Add-on safety

Risk impact

Dualsub - Dual Subtitles for YouTube requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk likelihood

Dualsub - Dual Subtitles for YouTube is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Upgrade to see risk analysis details