# Live Subtitle & Translator

> Real-time audio captioning and translation for browser tabs using AI speech recognition and translation APIs.

Canonical page: [https://chrome-stats.com/d/live-subtitle-translator](https://chrome-stats.com/d/live-subtitle-translator)

## Overview

- **ID:** `live-subtitle-translator`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** 梧糊
- **Category:** language-support,photos-music-videos
- **Daily users:** 106
- **Weekly downloads:** 142
- **Version:** 1.2.0
- **Last updated:** 2026-06-13
- **First published:** 2026-06-10
- **Size:** 29 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/live-subtitle-translator/)

## Description

<blockquote>Live Subtitle &amp; Translator provides real-time speech-to-text captioning and instant translation directly in your browser. Whether you're watching videos, attending web conferences, or listening to audio on any website, this extension captures the audio and displays live subtitles in a floating, draggable overlay.

<strong>Key Features:</strong>
- <strong>Real-time Captioning</strong> — Captures tab audio and generates subtitles word-by-word using AI-powered speech recognition (STT), with smooth typing animation for natural readability.
- <strong>Live Translation</strong> — Translates recognized speech in real-time using streaming AI translation APIs, displaying results token-by-token alongside the original text.
- <strong>Separate STT &amp; Translation Providers</strong> — Mix and match any combination of speech recognition and translation services. Use one provider for STT and a different one for translation.
- <strong>Multi-Provider Support</strong> — Works with OpenAI Whisper, Alibaba Cloud Paraformer, Zhipu GLM-ASR, Volcengine ASR, Tencent Cloud ASR, DeepSeek, Google Gemini, Qwen, Moonshot, Baichuan, MiniMax, SiliconFlow, and custom OpenAI-compatible endpoints.
- <strong>Smart Audio Capture</strong> — Automatically detects page media elements (video/audio) for zero-dialog capture. Falls back to microphone or screen sharing when needed.
- <strong>Pause-Aware Line Breaks</strong> — Detects natural speech pauses and starts a new subtitle line automatically, keeping the flow synchronized with the speaker.
- <strong>Customizable Appearance</strong> — Set font color and background color for both original and translated text independently. Supports transparent backgrounds with automatic text shadows for readability.
- <strong>Draggable Subtitle Overlay</strong> — Move the subtitle box anywhere on the page by dragging the handle.
- <strong>Bilingual UI</strong> — Switch between Chinese and English interface.
- <strong>Privacy First</strong> — All API keys are stored locally. Audio is processed only by your chosen provider. No data is collected by the extension itself.<strong>How to Use:</strong>
1. Open the extension popup and go to API Settings.
2. Configure your speech recognition provider and API key.
3. Optionally configure a translation provider.
4. Toggle "Subtitle" on in the popup.
5. Click the start button in the subtitle overlay to begin capturing audio.
6. If prompted, select the current tab and check "Share audio" in the dialog.</blockquote>

## Rankings

- #11,437 — Overall
- #83 — live
- #86 — speech
- #178 — deepseek
- #200 — translate

## Permissions and access

### Permissions

- `activeTab`
- `storage`
- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [FlashCaption - Live Captions](https://chrome-stats.com/d/flashcaption-live-captions) — 305 users, 1.00 / 5
- [CaptionGo – Live Captions & Dual Subtitles](https://chrome-stats.com/d/captiongo) — 423 users, 1.00 / 5
- [Real-Time Translator](https://chrome-stats.com/d/real-time-translator) — 30 users
- [AI Subtitle Translator](https://chrome-stats.com/d/ai-subtitle-translator) — 19 users
- [YouSub](https://chrome-stats.com/d/yousub) — 12 users
- [YouTube Bilingual Subtitles — AI](https://chrome-stats.com/d/youtube-bilingual-subtitles-ai) — 2 users
- [Mira Translator - Web Translation](https://chrome-stats.com/d/mira-translator) — 45 users, 5.00 / 5
- [LiveCaption](https://chrome-stats.com/d/liveccaption) — 27 users, 1.00 / 5
- [Auto-Subtitle](https://chrome-stats.com/d/auto-subtitle) — 961 users, 1.63 / 5
- [TaleTekst® Real-time Translator](https://chrome-stats.com/d/taletekst-real-time-translator) — 38 users, 1.00 / 5
- [SubText](https://chrome-stats.com/d/subtext) — 15 users, 5.00 / 5
- [VoxSub](https://chrome-stats.com/d/voxsub) — 13 users, 5.00 / 5

---

Source: [Chrome-Stats](https://chrome-stats.com/d/live-subtitle-translator)