Fluent Immigrant Firefox

Fluent Immigrant

Learn English from YouTube, Netflix and Prime Video. Interactive subtitles: click any word for a translation in Portuguese or Spanish, save it, and it becomes a flashcard. See how much English you already know.

Features & Capabilities

The Fluent Immigrant turns YouTube, Netflix and Prime Video subtitles into interactive English lessons for Portuguese and Spanish speakers.

Click any word in the subtitle to see its meaning, hear it, and save it to your vocabulary. Every saved word becomes a flashcard with spaced repetition, so what you learn while watching actually sticks. Dual subtitles (English plus your language) are one click away.

You already watch a lot of English. YouTube at lunch, Netflix at night. Almost none of it sticks, because you never do anything with the words. This extension is where you do something with them.

📺 Interactive subtitles on the sites you already use

  • Works on youtube.com, netflix.com, primevideo.com and Amazon Prime Video
  • Click any English word for a short explanation in Portuguese or Spanish
  • Hear the word spoken and read real example sentences
  • Karaoke subtitles: the full sentence on screen, each word lighting up as it is said (YouTube and Prime Video)
  • Hover the subtitle and the video pauses for you
🎨 See how much English you already know

Every word in the subtitle is coloured by how well you know it:

  • White: new word
  • Green: you recognise it when you hear it
  • Orange: it is yours, it comes out without thinking
Open any video and see, in the line itself, how much of it you already own.

🌍 Dual subtitles, when you want them

  • The translated line in Portuguese or Spanish, under the English original
  • Hidden by default. Turn it on for the hard parts, off for the rest
  • Watching something in Portuguese or Spanish? It flips around, and the English becomes the clickable line
🔁 Vocabulary builder and flashcards
  • Words you mark go straight into your Fluent Immigrant vocabulary
  • Flashcards are written from the words you actually met, not a list somebody else picked
  • Spaced repetition brings them back until they stick
  • Your progress counts the words, so you can see the finish line
🔒 What it reads 🚀 Getting started
  • Create an account at https://app.fluentimmigrant.com. It is free, and the first three days are full access. After that the program is a paid subscription
  • Install the extension, open it, press Connect account
  • Open a video. Captions turn on by themselves
💬 Who it is for

English learners who speak Portuguese (Brazil) or Spanish and want to learn English by watching videos, series and films with subtitles instead of textbooks. Immigrants, students, and anyone preparing to live or work in English.

Website: https://fluentimmigrant.com Support: support@fluentimmigrant.com

Not affiliated with YouTube, Netflix or Amazon.

The ** marks make bold text on Mozilla's page. Leave them in.

User Growth & Download Statistics

Manifest V3 Add-on
By:
Fluent Immigrant
Daily users:
1
Version:
0.2.4 Last updated: 2026-10-01
Version code:
6531569
Creation date:
2026-09-11
Firefox add-on GUID:
extension@thefluentimmigrant.com
Firefox add-on numeric ID:
3070339
Weekly download count:
1
Firefox on Android:
No
Risk:
Moderate risk impact High risk likelihood
Permissions:
Host permissions:
  • https://app.fluentimmigrant.com/*
  • https://app.thefluentimmigrant.com/*
  • https://www.youtube.com/*
  • https://www.youtube-nocookie.com/embed/*
  • https://www.netflix.com/*
  • https://*.primevideo.com/*
  • https://www.amazon.com/gp/video/*
Content scripts matches:
  • www.youtube.com
  • www.youtube-nocookie.com
  • www.netflix.com
  • *.primevideo.com
  • www.amazon.com
  • app.fluentimmigrant.com
  • app.thefluentimmigrant.com
Size:
99.77KB
Email:
su*****@fluentimmigrant.com
Website:
Privacy policy:
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-10-18
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:
Fluent Immigrant
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/fluent-immigrant/
Email:
su*****@fluentimmigrant.com
Website:
https://fluentimmigrant.com/contact/

Is Fluent Immigrant 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.
Moderate risk impactModerate risk impact

Fluent Immigrant requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Request access to the following domains: youtube.com, youtube-nocookie.com, netflix.com, primevideo.com, amazon.com, app.fluentimmigrant.com, app.thefluentimmigrant.com
  • 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.
High risk likelihoodHigh risk likelihood

Fluent Immigrant 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 **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
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