Add Subtitles

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

Manifest V2 Video Accessibility Productivity
By:
imadr
Daily users:
3,034+ 22
Rating:
4.14
(22)
Version:
1.3 Last updated: 2020-05-03
Version code:
5017266
Creation date:
2019-12-16
Risk:
Moderate risk impact Low risk likelihood
Permissions:
  • activeTab
  • <all_urls>
Size:
42.55K
URLs:
Website
Full description:
See detailed description
Source:
Firefox Browser Add-ons
Updated:
a day ago

Ranking

# 1,595 ▼ 14
Other rankings
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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 天灭中共退党团队保平安, 2025-04-06
doesn't work for some videos, i have tried other extensions they seem to detect video better.
by Ajay Karunakaran, 2025-02-15
by 敬念法轮大法好远离疫情, 2025-02-09
View all user reviews ›

Extension safety

Risk impact

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

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 **** ********* *** **** **** *******
Upgrade to see full risk analysis details

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