YouSub

Name: YouSub
Author: Masaru

By: Masaru

Real-time subtitle translator for YouTube

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Install

Features & Capabilities

YouSub translates YouTube subtitles in real-time using AI providers like Groq, OpenAI, Google Gemini, DeepSeek, Mistral, xAI, and OpenRouter.

Features: • Real-time subtitle translation with custom overlay • Support for 7+ AI providers — bring your own API key • Batch translation with streaming-like display • Subtitle sync engine that keeps translations aligned with video playback • Customizable overlay appearance (font, size, color, position) • Per-video translation cache to avoid re-translating • Works with any YouTube video that has subtitles/captions

No account required. Your API keys are stored locally and never sent to any third-party server.

User Growth & Download Statistics

Add-on

By:

Masaru

Daily users:

7 2

Version:

0.2.2 Last updated: 2026-05-14

Version code:

6261325

Creation date:

2026-04-25

Risk:

Permissions:

Host permissions:

*://*.youtube.com/*
https://api.groq.com/*
https://api.openai.com/*
https://api.anthropic.com/*
https://generativelanguage.googleapis.com/*
https://api.deepseek.com/*
https://api.x.ai/*
https://api.mistral.ai/*
https://openrouter.ai/*
https://translate.googleapis.com/*

Content scripts matches:

*.youtube.com

Size:

1.86MB

Email:

sy*****@gmail.com

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-17

Compare stats and ranking:

Ranking

# 37,282 ▲ 5,534

For Developers

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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:

Masaru

Firefox Add-ons Store

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

Email:

sy*****@gmail.com

Website:

https://gist.github.com/Masaru-urasaM

Is YouSub 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.

YouSub requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: youtube.com, groq.com, openai.com, anthropic.com, googleapis.com, deepseek.com, x.ai, mistral.ai, openrouter.ai
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****

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.

YouSub 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 has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****