Open the atbridge extension settings

Already installed atbridge.ai? Everything you configure lives in the atbridge Settings page. The quickest way there is two clicks from the AI Chat — no digging through Thunderbird’s menus.

Note

Haven’t installed the extension yet? See Set up the atbridge extension first.

Open Settings

1. Click the @b button in Thunderbird’s activity bar (the icon strip down the left) to open the atbridge AI Chat next to your mail.

2. In the AI Chat, click the ⚙ gear icon at the top right. The atbridge.ai Settings page opens in a new tab, on the Status panel.

Tip

Prefer Thunderbird’s own menus? You can also reach it via Tools → Add-ons and Themes → atbridge.ai → the ⋯ / gear → Options.

A tour of Settings

The left-hand menu groups everything:

• Status — is atbridge.ai connected to Thunderbird and your plan healthy? Start here if something’s off.
• License — activate this device or start a free trial (auto-detects your Thunderbird accounts; no key needed).
• AI providers — connect the AI you’ll chat with (OpenAI, Anthropic, Gemini, Ollama, …). Your key is encrypted on this device. → Connect your AI
• MCP setup — point an external app (Claude Desktop, an IDE) at atbridge.ai instead. → How your AI connects
• Connectors & Permissions — decide what AI may do with your data: switch the CLI and MCP connectors on (they start off) and choose, per area, which actions each connector — and the in-Thunderbird AI Chat — may perform.
• Preferences — defaults the AI Chat uses (which account to send from, which calendar, tone), Answer length, and Optional features — switch off Branded emails, Templates or Insert Image if you don’t use them.
• Prompt library — save reusable prompts for mail and calendar.
• Skill settings — your working hours/days and which skills show in the chat.
• Branded Email theme — your colours, font, logo, and signature for Branded Email. Hidden while Branded emails is switched off in Optional features.
• Templates — your saved Branded Email layouts.
• Versions — what’s installed and whether an update is available.
• Advanced — power-user toggles.

Next steps

Connect your AI Add a provider key and start chatting.

Use the atbridge AI Chat Ask across every mailbox at once.

atbridge Skills Instant slash-commands over mail + calendar.

Set up your brand theme Make every email on-brand.