Live Caption Video by Rév
Local real time captions with English translation for videos playing in any active tab. (Windows only)
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Extension Metadata
About this extension
An extension for firefox and a backend server (windows only) for compute to generate real time captions in English for videos playing in browser.
Install the backend from https://github.com/revoconner/Firefox-live-caption-translation/releases
- Can be activated per tab.
- Auto detects active video playing audio
- Overlays the caption on the video frame and auto adjusts to fit properly.
- Caption UI can be customised and auto fits in the video layout as firefox is resized.
- Auto detects language in real time.
- AI models only activates if extension is turned on for any tab and has active data streaming leading to good use of compute resources when not in use.
- Server resides in windows tray and shows the connection status with access to log.
Install the backend from https://github.com/revoconner/Firefox-live-caption-translation/releases
Only works on Windows since the backend server is only supported for Windows.
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Permissions and data
Required permissions:
- Access browser tabs
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 0.1.6
- Size
- 36.59 KB
- Last updated
- 4 days ago (Sep 16, 2026)
- Related Categories
- License
- Mozilla Public License 2.0
- Version History
- Tags
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