Add-ons
Privacy and Security
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DKIM Verifier
Verifies the DKIM-Signature of an e-mail.
29,695 users
Most Popular See all »
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Create and Save or Send Multiple Individual and Personalized Messages from a Draft82,464 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).56,901 users -
Confirm mail address and attachments based on flexible rules.
This is enterprise edition with less updates. Another edition for regular users:
https://addons.thunderbird.net/thunderbird/addon/flex-confirm-mail/26,195 users -
Check the message contents and addresses before you send the message...21,127 users
Top Rated See all »
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Adds the ability to create and edit entries in the password manager.172 users -
Adds optional columns to the Thread Pane to allow sorting email messages by:
* Full sender address -- e.g. "someone@example.com"
* Sender's domain -- e.g. "example.com"
* Sender's local part -- e.g. "someone"
* Sender's TLD -- e.g. ".com"5 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft82,464 users
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Users of outlook.com and o365 who have Advanced Thread Protection enabled will have all URL's in emails changed to redirect them to an Microsoft filter before opening. This is a bad idea.
This plugin will change the URL back to the original value.818 users -
Removes comment, display name automatically from addresses before sending mail.228 users
Recently Added See all »
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Spaces toolbar quick access Thunderbird Add-on for Tuta Calendar0 users -
Advanced email forensics. Maps hops, detects VPNs, and provides deep security analysis.34 users -
AI-powered email phishing detection using a private, local LLM. No data leaves your device.
Supported Local LLM Providers:
- Ollama
- LM Studio
- llama.cpp server
- vLLM
- etc.11 users -
Automatically set From address to match email aliases when replying, with optional alias suggestion and identity creation5 users
See all 208 extensions in Privacy and Security »
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