Add-ons
Privacy and Security
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DKIM Verifier
Verifies the DKIM-Signature of an e-mail.
9,463 users
Most Popular See all »
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OpenPGP message encryption and authentication for Thunderbird.98,590 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft66,588 users -
Check the message contents and addresses before you send the message...23,063 users -
Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).12,417 users -
Confirm mail address and attachments based on flexible rules.11,736 users
Top Rated See all »
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Adds metadata and sortable tags to the password manager.30 users
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Adds the ability to create and edit entries in the password manager.719 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"42 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft66,588 users
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Identity Chooser helps you to always use the correct identity when composing a new email.7,320 users
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Removes comment, display name automatically from addresses before sending mail.1,575 users
Recently Added See all »
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Replace URLs which have been rewritten by Office 365 Advanced Threat Protection with the original URL.8 users -
When using ProtonMail Bridge to integrate Mozilla Thunderbird withProtonMail, it's not easy to tell which emails were end-to-end (E2E) encrypted. This add-on puts an icon in the toolbar above every message to show you its encryption status.27 users -
Quick & easy PGP encryption / decryption tool
* Save & use many public encryption keys to encrypt mail content
* Save & use many private decryption keys to decrypt mail content
Using openPGP.js
Open Source
https://github.com/pgpgeek/pgpgeek45 users -
Diese Erweiterung überprüft ungelesene E-Mails auf Spoofingversuche. Die E-Mails werden mithilfe von fünf unterschiedlichen Tests untersucht um deren Legitimität festzustellen. Die Tests werden einzeln erklärt auf der Einstellungsseite.22 users -
Allows to disable the S/MIME signature of messages. Afterwards, these messages are no longer recognized as signed and their attachments can be deleted or detached.15 users -
Replace URLs which have been rewritten by Office 365 Advanced Threat Protection with the original URL.22 users
See all 153 extensions in Privacy and Security »
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