# Add Subtitles

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

Canonical page: [https://chrome-stats.com/d/add-subtitles](https://chrome-stats.com/d/add-subtitles)

## Overview

- **ID:** `add-subtitles`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** imadr
- **Category:** photos-music-videos
- **Daily users:** 3,484
- **Weekly downloads:** 187
- **Rating:** 4.04 / 5 (24 ratings)
- **Version:** 1.3
- **Last updated:** 2020-05-03
- **First published:** 2019-12-16
- **Size:** 42 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/add-subtitles/)
- **Website:** [https://github.com/imadr/add-subtitles](https://github.com/imadr/add-subtitles)

## Description

Add Subtitles is a Firefox extension that enables users to add subtitles to any <video> element on web pages. It supports popular subtitle formats like .srt and WebVTT, allowing you to upload subtitle files from your device or via a URL. Customize subtitle appearance by adjusting color, font, and size, and fine-tune synchronization with subtitle delay settings.

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.

## Rankings

- #1,499 — Overall
- #253 — Photos, Music & Videos
- #96 — iframe
- #138 — element
- #149 — permission
- #156 — permissions

## Permissions and access

### Permissions

- `activeTab`
- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

### 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

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Source: [Chrome-Stats](https://chrome-stats.com/d/add-subtitles)