NflxMultiSubs 2021 (Netflix Multi. Subtitles)

Name: NflxMultiSubs 2021 (Netflix Multi. Subtitles)
Rating: 4.6471 (17 reviews)
Author: gmertes

By: gmertes Add-on

Bilingual Subtitles for Netflix (fixed)

Overview

Firefox Add-ons Store

Daily users

2,906 ▲ 20

Data as of 2026-08-23

Rating:

4.65 ▲ 0.02

(17)

Version:

3.0.3

Last updated: 2026-06-12

Games & Entertainment

Features & Capabilities

NflxMultiSubs 2021 is a powerful Chrome and Firefox extension designed to enable bilingual subtitles on Netflix, supporting all languages including image-based scripts like Japanese and Chinese. This updated re-release fixes issues caused by the 2021 Netflix UI redesign and introduces various improvements for a smooth user experience.

Users can toggle secondary subtitles with three activation modes: disabled, automatic matching of subtitle language to audio, or remembering the last selected language. The extension integrates seamlessly with Netflix's native player UI, allowing easy language switching. Additionally, users can adjust playback speed via convenient hotkeys ([ and ]). NflxMultiSubs 2021 is free, open source, and enhances viewing accessibility and language learning on Netflix.

User Growth & Download Statistics

Add-on Communication Entertainment

By:

gmertes

Daily users:

2,906 20

Rating:

4.65

(17) 0.02

Version:

3.0.3 Last updated: 2026-06-12

Version code:

6304065

Creation date:

2021-10-20

Risk:

Permissions:

storage
https://www.netflix.com/watch/*
https://assets.nflxext.com/*

Content scripts matches:

www.netflix.com

Size:

128.88KB

Email:

ad*****@gertmertes.be

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-08-23

Compare stats and ranking:

Ranking

# 1,694 ▲ 4

Other rankings

#157 in Games & Entertainment ▲ 1#287 in Photos, Music & Videos #18 in netflix keyword 59 #89 in netsuite keyword 19 #186 in release keyword 24 ▼ 3

Other platforms

NflxMultiSubs 2021 (Netflix Multi. Subtitles) (v3.0.3)

50,000 4.70

(136)

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:

gmertes

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/nflxmultisubs-2021/

Email:

ad*****@gertmertes.be

Website:

https://github.com/gmertes/NflxMultiSubs

User Reviews

Reviews praise NflxMultiSubs for reliability, ease of use, and dual-subtitle support, with simple customization. However, recurring issues include a missing quick toggle to enable/disable, occasional subtitle overlay when switching off one stream, color customization not applying, and occasional incompatibilities with other extensions. Overall it’s a useful, lightweight tool with room for UX and compatibility improvements.

Pros

It works well and is intuitive (helpful)
Dual/multi-subtitle support
Simple and straightforward to use
Subtitle customization options (size and color)
Generally stable with no noticeable bugs

Cons

No quick toggle to enable/disable (must use Add-ons manager)
Disabling the second subtitle can cause the main subtitle to float/overlay unexpectedly
Color customization sometimes does not apply despite options
Occasional compatibility issues with other extensions

Recent reviews

Very helpful!! Thank you very much!!

by ve*****, 2026-08-23

best netflix dual sub extention ive seen so far

by re*****, 2026-02-26

View all user reviews ›

Is NflxMultiSubs 2021 (Netflix Multi. Subtitles) 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.

NflxMultiSubs 2021 (Netflix Multi. Subtitles) requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: netflix.com, nflxext.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.

NflxMultiSubs 2021 (Netflix Multi. Subtitles) is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******