SubText Firefox

SubText

By: SubText Add-on
Watch videos with dual-language subtitles. Get AI translations, hover over a word for a translation, click for deeper word/phrase breakdowns, and save vocabulary to review later. Works on YouTube, Netflix, Disney+, Prime Video, Hulu, Viki, and Udemy.

Features & Capabilities

Turn the shows and films you watch into language practice.

SubText shows two subtitle lines at once, the original and a translation, so you can learn languages while watching the shows you already love.

Features:

  • Dual Subtitles: original & translation, synced to playback.
  • Three translation modes: context-aware AI translations, machine translations, or the site's own caption track.
  • Word Hover: hover over a word for its meaning.
  • Phrase Selection: select a phrase for its translation.
  • Click on a word for a deeper breakdown: definition, part of speech, base form, and an example sentence.
  • Hear it out loud: play the pronunciation of a word or phrase.
  • Expression Highlights: SubText detects expressions such as idioms, phrasal verbs, collocations, sayings, and slang, allowing you to choose which kinds to highlight and in what color.
  • Follow-Along: words light up as they're spoken (for videos that support it).
  • Save to your library: save the words, phrases, and expressions you find to your personal library. Review them later with study tools like flashcards, quizzes, and the ability to create your own study sets on subtext.site.
  • Make it yours: colors, sizing, position, playback-speed, subtitle keyboard shortcuts, per-site settings, and more configurable via a menu.
  • and more.

Supported platforms: YouTube, Netflix, Disney+, Prime Video, Hulu, Viki, Udemy, Stremio, SVT Play, and NRK TV.

Free features: machine-translated dual-language subtitles, word hover, phrase translations, and pronunciations all work without an account.

A SubText paid subscription unlocks higher-quality, context-aware AI translations, expression detection, saving to your personal library, manual curation tools, and more.

User Growth & Download Statistics

Manifest V3 Add-on
By:
SubText
Daily users:
5 1
Rating:
5.00
(1)
Version:
1.2.8 Last updated: 2026-07-28
Version code:
6381098
Creation date:
2026-06-21
Risk:
Very high risk impact High risk likelihood
Permissions:
Host permissions:
  • <all_urls>
Content scripts matches:
  • *.svtplay.se
  • *.svt.se
  • *.youtube.com
  • youtube.com
  • *.udemy.com
  • *.netflix.com
  • *.disneyplus.com
  • *.primevideo.com
  • *.amazon.com
  • *.amazon.co.uk
  • See more
Size:
571.02KB
Email:
su*****@gmail.com
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-08-03
Compare stats and ranking:

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:
SubText
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/subtext/
Email:
su*****@gmail.com
Website:
https://subtext.site

Is SubText 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.

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

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
  • Critical ******* ****** ** *** ********* ******** *********** ******* ************ ********** ************ *************** *************** *********** ****** ********** ********** ********** ********** ********** ******* ****** ********** ******* ******* ********** ********** ********** ******* ********** ********** ********** ********** ********* ************ ******* ********* ************
  • High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******
  • 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.

SubText 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.
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
  • Good **** ********* *** **** **** *******
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