# A subtitle extension for the videos you watch

> A subtitle extension for the videos you watch: live text, optional translation and saved transcripts in Chrome and Firefox. Public store listings coming soon.

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

Keep the video open. transcript1 adds subtitles over the player, translates them when you choose a language, and saves the words for later. Available as private builds for Chrome and Firefox.

- Chrome and Firefox
- Live subtitles with optional translation
- Sign in with your transcript1 account

## From watching to words you can keep

### Read as you watch

Start subtitles from the extension. Adjust the text size and position without leaving the video.

### Follow another language

Choose a translation and show it alongside the original. You decide which text stays on screen.

### Return to the transcript

Live sessions save to your transcripts by default. Read and copy the words in the dashboard, or turn saving off in settings.

## Choose your browser

Use the [Chrome extension](https://transcript1.com/features/chrome-extension) or the [Firefox extension](https://transcript1.com/features/firefox-extension). Both support live subtitles and translation on ordinary video sites. Chrome also supports protected-video audio capture; Firefox does not support DRM-protected players.

## Start with the video you are watching

### 1. Open the extension and sign in

Sign in on transcript1.com. There is no API key to paste into the extension.

### 2. Start subtitles

Play a video, open transcript1 and choose Start subtitles. Choose a translation language if you want one.

### 3. Read it again later

Open your transcripts in the dashboard. Live-session saving is enabled by default and can be disabled in settings.

## Live, ahead of playback, or the whole video

Live subtitles follow the audio as it plays. On supported sources transcript1 can fetch, it transcribes ahead of playback for in-sync subtitles. Switch to whole video on those sources to prepare the entire transcript before jumping around.

## Availability and minutes

The extensions are in private testing. Public Chrome Web Store and Firefox Add-ons listings are coming soon. You can use the web dashboard now to transcribe a supported link or uploaded file.

Use your transcript1 account and minute balance. Live sessions use 1 credit per started minute of connected time. Ahead-of-playback transcription is charged as audio is transcribed; whole-video mode is charged for the full video length. Stop subtitles when you finish.

## Frequently asked questions

### Can I install it from a browser store today?

Public store listings are not available yet. The extension is being tested in private builds. You can start with the web dashboard while the listings are prepared.

### Does it work on every page?

It works with ordinary video players where the extension has permission. Browser-internal pages and inaccessible players are outside its reach. DRM-protected video audio capture is supported in Chrome, not Firefox.

### Do I need an API key?

No. Sign in with your transcript1 account. The extension uses your account balance; the REST API is also available separately for building your own tools.

### Are my live subtitles saved?

Yes, live-session saving is on by default. You can turn it off in settings. Saved sessions appear in your transcripts in the dashboard.

## Related

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