# A Firefox subtitle extension for watching and understanding

> A Firefox subtitle extension for ordinary video sites. Read live captions, add a translation and keep the transcript. Firefox Add-ons listing coming soon.

Canonical: https://transcript1.com/features/firefox-extension
Last updated: 2026-11-08

Follow videos in Firefox with live subtitles and an optional translation. Keep the words in your transcript1 dashboard, ready to read after the video ends.

- Built for Firefox
- Ordinary video sites; no DRM capture
- Sign in with your transcript1 account

## Keep watching in Firefox

### Read along in the player

Start subtitles on a video site and choose the text size and position. The video stays where it is.

### Add another language

Choose a translation and read it alongside the original subtitles. Change which text appears from the on-video menu.

### Save what you watched

Live-session transcripts are saved by default. Read and copy them in the dashboard, or turn saving off in settings.

## Installation availability

The Firefox Add-ons listing is coming soon. Private testers use a supplied build; an unsigned temporary add-on is removed when Firefox restarts, while a signed unlisted build can stay installed. Sign in with your transcript1 account once the extension is installed.

## Start subtitles in Firefox

### 1. Open a video and the extension

Play a video on an ordinary video site. Open transcript1 and choose Start subtitles.

### 2. Read or translate

Choose a translation language if needed. Adjust the subtitle size and position using the label on the video.

### 3. Return to the saved text

Stop subtitles when you finish. Your live transcript appears in the dashboard when saving is enabled.

## Know the Firefox limits

Firefox cannot capture audio from DRM-protected players. Use the [Chrome extension](https://transcript1.com/features/chrome-extension) for protected-video capture. On ordinary sites, permissions and player access still apply. A video muted by the site may need its sound turned on for Firefox to capture it.

## Minutes and other ways to transcribe

Live subtitles use 1 credit per started minute of connected time from your transcript1 balance. On fetchable sources, ahead-of-playback audio is charged as transcribed and whole-video mode charges for the full video length.

You can use the web dashboard now for supported recorded-video links and uploaded files. The [API](https://transcript1.com/docs/getting-started) is available for developers building their own workflows.

## Frequently asked questions

### Can I install it from Firefox Add-ons?

The Firefox Add-ons listing is coming soon. Current versions are private test builds. This page will show the verified Firefox Add-ons link when it is ready.

### Does the Firefox add-on work with Netflix or other DRM players?

No. Firefox cannot capture audio from DRM-protected players. Protected-video capture is a Chrome capability; the Firefox extension is for ordinary video sites.

### Why might I need to unmute the video?

Firefox captures the player audio. If the site has already muted the video, the extension may ask you to turn its sound on so it can hear it.

### Do I need a separate account for Firefox?

No. Use your transcript1 account and its minute balance. Live transcripts are saved to that account by default; you can disable saving in settings.

## Related

- [Browser extensions](https://transcript1.com/features/browser-extension)
- [Chrome extension](https://transcript1.com/features/chrome-extension)
- [Video to text](https://transcript1.com/features/video-to-text)
- [Getting started (docs)](https://transcript1.com/docs/getting-started)