Add-ons
Privacy and Security
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DKIM Verifier
Verifies the DKIM-Signature of an e-mail.
11,591 users
Most Popular See all »
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OpenPGP message encryption and authentication for Thunderbird.86,312 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft68,628 users -
Check the message contents and addresses before you send the message...18,669 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).11,811 users
Top Rated See all »
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Adds metadata and sortable tags to the password manager.28 users
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Adds the ability to create and edit entries in the password manager.654 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"39 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft68,628 users
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Identity Chooser helps you to always use the correct identity when composing a new email.6,214 users
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Removes comment, display name automatically from addresses before sending mail.1,173 users
Recently Added See all »
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Just Report It (https://justreport.it) is an email plugin which tackles spam the right way. Report emails straight to SpamCop, the Registrar, a custom email address or any combination in between!83 users -
Replace URLs which have been rewritten by Office 365 Advanced Threat Protection with the original URL.73 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.240 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/pgpgeek138 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.48 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.8 users
See all 154 extensions in Privacy and Security »
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