Magic Translator

About this Add-on

Magic Translator is the premier translation add-on for Mozilla Thunderbird, allowing you to read, understand, and compose foreign emails seamlessly.

Reading Pane Translation

Instant translation right within the message reading pane without opening external browser tabs.
Interactive engine badge with live green connection status dot and direct settings access.
One-click original message restoration via the Original button.
Clean and complete closing to keep your email text 100% clear and unobstructed.

Compose Mode: Translate Before Sending

Dedicated toolbar button in the message composition window to translate drafts on the fly.
Flexible translation scope: translate Subject, full message Body, or selected text only.
In-place surgical text replacement preserving your existing draft layout.
One-click original draft restoration via Restore original.

Multi-Engine and LLM Translation Hub

Google Translate (default): 100% free, ready to use with zero setup.
DeepL API (Free and Pro): Industry-standard linguistic precision for professional emails.
Google Gemini API (Cloud AI): Real-time official model synchronization and ultra-fast gemini-3.5-flash-lite.
OpenAI-Compatible LLM Hub: Connect OpenAI, Groq Cloud, Mistral AI, or local Ollama and LM Studio servers for full privacy and sovereign offline translation.
LibreTranslate (Open source): Connect your private self-hosted instances.

Privacy and Performance First

Zero trackers, zero analytics, no advertisements.
Direct HTTPS connections from your device to the selected provider (or 100% offline with Ollama).
Complete UI isolation using Shadow DOM to keep email layouts intact.

Effortless Workflow

Click the dedicated Translate button in the message or compose header (or press Alt+Shift+T).
Click the active engine badge for quick access to preferences and engine settings.

Developer’s Comments

Magic Translator was designed to provide a fast, seamless, and privacy-conscious multilingual translation experience inside Mozilla Thunderbird, for both reading and drafting emails.

Issue Reporting & Support:
To report a bug, ask a question, or suggest an enhancement, feel free to open an issue on our official repository: https://github.com/mtfkarukera/magic-translator-tb/issues

Privacy & Transparency:
The add-on operates without any intermediate proxy server. Translation requests are sent directly from your device to the selected provider (or remain 100% local with Ollama / LM Studio). Your API keys and engine preferences are stored exclusively locally via the secure browser.storage.local API.

Roadmap:
Upcoming releases will continue expanding the LLM Hub with additional model presets and multilingual rewriting assistance features.

Version Information

Version 2.2.0 Released Aug. 17, 2026 77.6 KiB Works with Thunderbird 128.0 and later

Version 2.2.0 — Cloud LLMs Hub (Gemini, OpenAI, Groq, Mistral) & Local LLMs (Ollama, LM Studio)

✨ Major Highlights:
- Dedicated Google Gemini API: Native REST integration with Google AI Studio featuring real-time dynamic model synchronization and ultra-fast gemini-3.5-flash-lite by default (with full support for gemini-3.7-flash, gemini-2.5-flash, etc.).
- Universal OpenAI-Compatible Hub: Connect any Cloud or Local LLM in one click via the standard /v1/chat/completions API (OpenAI gpt-4o-mini, Groq Cloud llama-3.3-70b-versatile, Mistral AI, Ollama, LM Studio, vLLM).
- 100% Sovereign Local Translation: Seamless support for local servers like Ollama (http://localhost:11434) and LM Studio (http://localhost:1234) with zero API keys required.
- Robust Translation Prompting: Strict system prompts with automated raw text sanitation ensuring clean, high-fidelity translations without preamble or markdown fences.
- Extended Options Page: Dedicated settings forms, instant live model sync button, presets and smart autofill.

Source code released under Mozilla Public License, version 2.0

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Add-ons

Welcome to Thunderbird Add-ons.

On the go?

Magic Translator 2.2.0

by MTF Karukera

About this Add-on

Developer’s Comments

Version Information

Version 2.2.0 Released Aug. 17, 2026 77.6 KiB Works with Thunderbird 128.0 and later

Add-ons

Welcome to Thunderbird Add-ons.

On the go?

Magic Translator 2.2.0

by MTF Karukera

About this Add-on

Developer’s Comments

Version Information

Version 2.2.0 Released Aug. 17, 2026 77.6 KiB Works with Thunderbird 128.0 and later

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