CCaptioner

Assign a text track to a video element in a web page

CCaptioner: Add Text Track to HTML5 Video on Firefox

CCaptioner is a Firefox extension designed to enhance the video viewing experience by adding the ability to assign a text track or subtitles to HTML5 videos. Many video players do not offer this feature, but with CCaptioner, you can easily add a .srt or .vtt file as a text track. It can be injected into specific websites when clicked on its toolbar icon. Due to its activeTab and <all_urls> permissions, it can interact with loaded web pages and be used in embedded iframe elements. Additionally, it allows for time-shifting the text track, useful when synchronisation issues arise.
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Add-on stats

Users: 755
Rating: 4.10
(10)
Version: 1.1.0 (Last updated: 2020-02-26)
Creation date: 2020-01-28
Weekly download count: 59
Firefox on Android: No
Risk impact: Moderate risk impact
Risk likelihood:
High risk likelihood
Manifest version: 2
Permissions:
  • activeTab
  • <all_urls>
Size: 30.47K
URLs: Website

Other platforms

CCaptioner (v1.1.0)
3.20 (15) 1,000
Not available on Android
Not available on Edge
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Add-on summary

Analyze keywords

A very simple extension which purpose is to assign a text track to a HTML5 video element in a web page.

Many HTML5 video players do not offer the ability to import text track for captions/subtitles purpose. The purpose of this extension is to remediate this problem.

When you want to assign a text track to a video element in a web page:

  • Open the popup menu and click "Assign text track to..."
  • Move the mouse over the target video element
    • Click the video element if needed
  • A file picker will appear
  • Pick the .srt or .vtt file to use as text track

The video should now render the captions/subtitles of the file you selected.

The content scripts of CCaptioner are injected if and only if you click on its toolbar icon while on a specific web site, and only for that web site. Once the text track is embedded, the content script terminates and should be garbage-collected by your browser's JavaScript engine.

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User reviews

Would not work on any videos I tried it on...
by Firefox user 18570775, 2024-09-26
by Andreas, 2024-04-05
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Add-on safety

Risk impact

CCaptioner requires a few sensitive permissions. Exercise caution before installing.

Risk likelihood

CCaptioner may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

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