Add Subtitles

Name: Add Subtitles
Rating: 4.1739 (23 reviews)
Author: imadr

By: imadr

Firefox extension that let you add subtitles to any <video> element.

Download

Install

Features & Capabilities

Add Subtitles is a Firefox extension that enables users to add subtitles to any

The extension offers a simple interface accessed via toolbar icon, where you can select the video element and upload subtitles accordingly. It also supports fullscreen video mode with subtitles maintained on screen. Note that it does not work with videos embedded inside iframes unless opened in a new tab. The extension requires permission to access data across websites only to enable subtitle uploads from any URL, ensuring smooth and versatile subtitle addition.

User Growth & Download Statistics

Add-on Accessibility

By:

imadr

Daily users:

3,412 -25

Rating:

4.17

(23)

Version:

1.3 Last updated: 2020-05-03

Version code:

5017266

Creation date:

2019-12-16

Risk:

Permissions:

activeTab
<all_urls>

Size:

41.55KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-18

Compare stats and ranking:

Ranking

# 1,514 ▼ 12

Other rankings

#252 in Photos, Music & Videos ▼ 1

#88 in iframe keyword 6 ▲ 1

#125 in element keyword 27

#136 in upload keyword 28 ▼ 2

#143 in permission keyword 11 ▲ 1

Upgrade to see more rankings

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:

imadr

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/add-subtitles/

Website:

https://github.com/imadr/add-subtitles

User Reviews

Pros

User-friendly interface
Effective for adding subtitles to various video platforms
Works well for some users with specific videos
Great for older movies without needing to download them

Cons

Doesn't work for some videos
Manual upload and URL options often fail
Flickering subtitles on certain shows
Ineffective on YouTube according to multiple users

Recent reviews

by Ro*****, 2026-06-10

by 天灭*****, 2025-04-06

doesn't work for some videos, i have tried other extensions they seem to detect video better.

by Aj*****, 2025-02-15

View all user reviews ›

Is Add 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.

Add Subtitles requires a few 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.

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.

Add Subtitles has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

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