Mira Translator by David Bai
Open-source & secure webpage translation, YouTube bilingual subtitles.
Available on Firefox for Android™Available on Firefox for Android™
3 Users3 Users
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About this extension
🌐 Immersive Translation · 🎬 YouTube Dual Subtitles · 🤖 AI Translation · 📝 Word Lookup
100% Open Source · Privacy-First · Fast & Lightweight
🆓 Core Features (Completely Free)
Instant web translation & YouTube dual subtitles out of the box (enable the video's built-in CC button for subtitles). Powered by Google & Bing.
⚡ Advanced AI Translation
Bring Your Own Key
Use your own API Key from Gemini, GPT, Groq, Claude, and more. Fully local — no middleman, no data relay. We never sell or provide Keys.
🎯 Custom Translation Zones
Use the smart selector to highlight any area on any website. Saved per domain automatically.
📚 Vocabulary Review
Double-click any word to look it up and save it. Saved words are auto-highlighted across all pages and YouTube subtitles.
✨ More Features
· Deep parsing of Facebook, Instagram, Twitter (X), Reddit, GitHub, and other complex sites
· YouTube dual subtitles with live preview and one-click download
· API Keys stored locally with WebDAV / Google Drive encrypted sync
Source code: https://github.com/os9sur/MiraTranslator/
100% Open Source · Privacy-First · Fast & Lightweight
🆓 Core Features (Completely Free)
Instant web translation & YouTube dual subtitles out of the box (enable the video's built-in CC button for subtitles). Powered by Google & Bing.
⚡ Advanced AI Translation
Bring Your Own Key
Use your own API Key from Gemini, GPT, Groq, Claude, and more. Fully local — no middleman, no data relay. We never sell or provide Keys.
🎯 Custom Translation Zones
Use the smart selector to highlight any area on any website. Saved per domain automatically.
📚 Vocabulary Review
Double-click any word to look it up and save it. Saved words are auto-highlighted across all pages and YouTube subtitles.
✨ More Features
· Deep parsing of Facebook, Instagram, Twitter (X), Reddit, GitHub, and other complex sites
· YouTube dual subtitles with live preview and one-click download
· API Keys stored locally with WebDAV / Google Drive encrypted sync
Source code: https://github.com/os9sur/MiraTranslator/
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Permissions and data
Required permissions:
- Access browser tabs
- Access your data for all websites
Optional permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 3.5.7.0
- Size
- 361.85 KB
- Last updated
- 13 hours ago (Jun 15, 2026)
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- Version History
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